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Drafting General Terms and Conditions for Installation Companies

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Our services include a free consultation, a draft document, a revision round, and a final document. We invoice after sending the draft document.

Experience with legal services for entrepreneurs since 2001
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An incorrect document often provides a false sense of security.
You think everything is taken care of, but only discover whether the document actually works during a conflict or claim.

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Mr. Jaime Boogaers
Mr. Jaime Boogaers
Corporate Law
Attorney, 16 years of experience

In installation work, it must be clear which installation is being supplied, which technical principles apply, and what the customer needs to prepare. Without proper terms and conditions, disputes regarding additional work, malfunctions, warranty, and damage quickly arise

  • For installation companies, technicians, and technical service providers
  • Attention to installation, materials, safety, and delivery
  • Additional work, warranty, maintenance, breakdowns, and liability arranged
  • Practical for quotations, work orders, and maintenance contracts

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About us

Our expertise in general terms and conditions for installation companies

Our lawyers and in-house counsel assist installation companies, technicians, service companies, and technical service providers with general terms and conditions, contracting agreements, maintenance contracts, and SLAs. We examine technical scope, materials, access, safety, additional work, delivery, warranty, maintenance, malfunctions, payment, and liability.

Custom solutions for your installation company

An electrical installer, plumber, HVAC installer, solar panel company, or data installer does not need the same terms and conditions. Therefore, we tailor the terms and conditions to your technology, customers, projects, materials, and risks.

Our facts

  • Active since 2001
  • Lawyers and in-house counsel
  • Experience with installation, contracting, service, and maintenance
  • Attention to additional work, delivery, warranty, and liability
  • Fixed rates in advance where possible
  • Customization
  • About us
from 99.- per document

Do you already have a document, but are unsure if it is still correct? We check content, risks, and practical usability.

  • Our legal expert spends 0.5 to 1.5 hours on the check
  • Telephone intake with a lawyer
  • Checks on content, risks, and practical usability
  • Attention to liability, payment, and termination
  • Concrete points for improvement and legal advice
  • Delivered within 3 working days, express delivery possible
from 199.- per document

Is your document outdated, copied, generated with AI, or no longer suitable? We check and adjust the document.

  • Our legal expert spends 1.5 to 2.5 hours checking and making adjustments
  • Telephone intake with a lawyer
  • Verification of the existing document
  • Adaptation to your business and working methods
  • Suitable for new services, customers, or risks
  • Delivered within 5 working days, express delivery possible

About us

Our expertise in general terms and conditions for installation companies

Our lawyers and in-house counsel assist installation companies, technicians, service companies, and technical service providers with general terms and conditions, contracting agreements, maintenance contracts, and SLAs. We examine technical scope, materials, access, safety, additional work, delivery, warranty, maintenance, malfunctions, payment, and liability.

Custom solutions for your installation company

An electrical installer, plumber, HVAC installer, solar panel company, or data installer does not need the same terms and conditions. Therefore, we tailor the terms and conditions to your technology, customers, projects, materials, and risks.

Our facts

  • Active since 2001
  • Lawyers and in-house counsel
  • Experience with installation, contracting, service, and maintenance
  • Attention to additional work, delivery, warranty, and liability
  • Fixed rates in advance where possible

Reviews (21)

Zakaria

We came in with a vague idea, but were immediately presented with concrete steps. We received valuable tips on how to present the documents to our clients in practice. The quality fully met our expectations.

Bjorn

The nuances of our business operations were listened to carefully. They immediately recognized where the sensitivities lay within our collaboration. Our business partners were impressed by the professionalism of the contracts.

Najat

Practical advice that we could use immediately. It was nice that they didn't charge by the hour for a simple extra question. The service was professional and personal.

Naomi

Professional approach without unnecessarily complicated language. We received a clear explanation of the risks. The quality fully met our expectations.

Henk

I was struck by how customer-oriented the initial approach was. It was very pleasant that we could review the drafts digitally and quickly. Our business partners were impressed by the professionalism of the contracts.

Driss

I had not expected legal assistance could be so accessible. Communication by email and phone was clear. A reliable partner who strives for perfection in their documents.

Claudia

The approach was professional and personal. The concept was ready quickly and highly usable. A party that delivers on what it promises on the website.

Gijs

From the very first moment, we felt heard. It was nice that we could call in immediately if anything in the draft was unclear. Our business partners were impressed by the professionalism of the contracts.

Amin

We quickly gained the certainty we were looking for. Reviewing and editing our general terms and conditions has significantly improved the quality. A party that delivers on what it promises on its website.

Safae

The direct contact and the absence of hidden costs were the deciding factors. We were also able to ask questions after the initial consultation. Fantastic value for money for this level of expertise.

Amani

They really thought along with our situation. The contact was approachable and professional. A reliable partner that strives for perfection in their documents.

Sabri

The flexibility in scheduling an appointment was very pleasant. They considered not only preventing disputes but also finding practical solutions. Everything was delivered neatly and on time.

Blackbird

The openness regarding the expected result was very welcome. The documents are written in such a way that they grow with the future of our company. The service was professional and personal.

Nour

The personal touch during the initial meeting was a major plus. Every adjustment we wanted was incorporated seamlessly and legally correctly. Everything was delivered neatly and on time.

Emma

It is clear that they know what they are talking about, right from the first word. The complexity of our shareholder structure was effortlessly translated into the agreement. Everything was delivered neatly and on time.

Ilse

The clear start gave us a lot of confidence for the rest of the process. We were also able to ask questions after receiving the document. The document was accepted flawlessly by our investors.

Thijs

The review of the document was thorough. The flexibility to add an extra provision at the last minute was highly appreciated. The document was accepted flawlessly by our investors.

Oussama

It was immediately apparent that the lawyer had extensive experience in our sector. The telephone consultation regarding the final details provided just that little bit of extra confidence. The final result aligns 100% with our high standards.

Teun

The direct and no-nonsense mentality appealed to us greatly. The legal language was firm and assertive where necessary, but lenient where possible. The quality fully met our expectations.

Victor

The first impression was simply excellent. Even outside regular hours, we received a quick response to an urgent question. A reliable partner that strives for perfection in their documents.

Hajar

The lawyer's sharp questions immediately got us thinking. The draft was delivered faster than promised in the quotation. Fantastic value for money for this level of expertise.

Meet our office

Our ContractCheck, simply explained what can all go wrong.

Why MKB Juristen?

Since 2001, we have been active as a no-nonsense legal firm for entrepreneurs. We quickly get to the heart of the matter: with a thorough assessment, clear answers, and a document that works practically.

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What you can expect from us

We translate your situation into a legal document that you can actually use. You won't receive a loose template, but a document tailored to your business, agreements, and risks.

  • A clear roadmap: intake, concept, revision round, and final version
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  • Legal attention to liability, payment, and termination
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Are you unsure whether you should have the document drafted, checked, or amended?
During the initial consultation, we will determine the sensible course of action together. Afterward, you will know exactly where you stand.

Why customization?

A legal document only works well if it aligns with your business, agreements, risks, and industry. That is why we do not work with a standard generator, but with legal experts who assess your situation.

  • Prepared for your company
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  • No standard template
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What do you get?

You will receive a legal document that is practical and aligns with the agreements you wish to make.

  • Draft document or legal review
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The founders of MKB Juristen

Our organization consists of several small teams working within various legal fields. Each legal field has its own senior in-house counsel and/or lawyers.

Denian Wielhouwer

Corporate lawyer in corporate law & business expert

Denian Wielhouwer

Annelore Hendriks

Corporate lawyer, corporate law, administrative law

Annelore Hendriks

Ilja van Driel

Corporate law attorney, employment law

Ilja van Driel

Jaime Boogaers

Corporate law, ICT & privacy law, energy law attorney

Jaime Boogaers
Custom choices

Which choices determine the content?

The terms that best suit you depend on your type of work and clients. The questions below determine which agreements need to be given more weight.

Choice or question Why this matters legally
Do you work for consumers or business clients? For consumers, many clauses are more quickly deemed unreasonably onerous and invalid; if you focus on businesses, you have more scope to limit liability and clearly define payment terms.
Do you carry out standalone installations or larger contracted works? In contracting work, completion, variations, and deadlines play a greater role than in small assembly jobs.
Do you work with subcontractors or hired technicians? Then you must arrange who is liable for their errors and how you pass on or limit that liability.
Do you supply the materials yourself or does the customer? This determines your warranty and liability position regarding defective materials and the necessity of retention of title.
Do you work with fixed prices or with cost-plus pricing? With post-calculation and target prices, clear agreements regarding hours, materials, and additional work are necessary to avoid disputes over the final invoice.
Clauses and provisions

Which elements belong in general terms and conditions for installation companies?

A good set of terms and conditions for an installation company covers the entire chain from quotation to completion and aftercare. Below you will see the components that belong in almost every set, when they apply, and why they are important.

Provision Relevant to Legal point of attention
Applicability and precedence With every quotation and order Ensures that your terms and conditions apply and take precedence over the customer's purchasing terms and conditions; prevents the so-called battle of forms.
Quotation, price and additional work Before and during execution Specifies the duration of a quotation and that additional work and changed material prices will be charged separately.
Delivery and transfer of risk Upon completion of the work Determines when the work is considered completed and when the risk passes to the client.
Warranty and repair After delivery Describes the warranty you provide on installation and materials, and how complaints are reported and rectified.
Liability and limitation In case of damage or defects Limit your liability, for example to the contract sum or the amount paid out by your insurer, and exclude consequential damages as much as possible.
Payment and retention of title Upon invoicing Manages payment terms, interest, and costs for late payment and holds delivered materials as your property until full payment.
Force majeure and stagnation In case of delay beyond your control Arranges for deferral or chargeback for causes such as delivery problems, weather, or access that the customer does not arrange.
Complaints, suspension and disputes In case of conflict Determines the time limit for complaints, your right to suspension, and which court or regulation applies in the event of a dispute.
Use in practice

How do you use this document correctly?

General terms and conditions are only effective if the customer is aware of and accepts them before the agreement is concluded. Therefore, follow the steps below.

Situation What should you do? Point of attention
With the quotation Refer to your terms and conditions in the quotation and provide them simultaneously or send them along. Terms and conditions bind the customer only if he could have known them before or at the time of concluding the agreement.
Upon order confirmation Have the client confirm the order and the applicability of the terms and conditions. A confirmation prevents later discussion as to whether the terms and conditions have been accepted.
In case of changes or additional work Document deviations and additional work in writing, with reference to the terms and conditions. In this way, the agreed risk allocation remains intact and additional work has been demonstrably agreed upon.
For invoicing and complaints Consistently apply the agreed payment terms, complaint periods, and warranty rules. Whoever fails to comply with his own terms weakens their enforceability.
Common mistakes

Common mistakes

In practice, things usually go wrong not in the text, but in the application of the terms and conditions. These are the mistakes installation companies make most often.

Wrong Consequence Better approach
Mention conditions only on the invoice The terms and conditions do not apply because they were provided too late. Refer to the terms and conditions in the quotation and make them available.
Blindly copying consumer clauses from a business set Clauses are unreasonably burdensome and therefore voidable. Use a set tailored to your customer type or a separate consumer variant.
No retention of title on delivered materials In the event of the customer's bankruptcy, you lose your materials and your money. Include a clear retention of title clause until full payment.
Agree on additional work verbally You cannot prove the extra costs and often have to bear them yourself. Always confirm additional work in writing before carrying it out.
Failure to limit liability or limiting it too vaguely You are liable for high consequential damages that are not covered by your insurance. Limit liability specifically, for example to the contract sum or the insurance payout.
Risk profile

What is your situation and what do you pay attention to?

Depending on your working practices, the emphasis of your terms and conditions shifts. Identify your situation below and what to pay extra attention to.

Risk profile Example Focus in the document
You install at private homes You work for consumers with legal protection. Keep clauses reasonable, provide a clear warranty, and pay attention to the rules regarding repair and liability for consumers.
You work as a subcontractor for main contractors Your work is part of a larger project, and the schedule depends on others. Rule stagnation, connecting to the work of others, and passing on delays not caused by you.
You work with expensive installations and sensitive systems A malfunction can cause significant consequential damage, such as water damage or downtime. Strictly limit consequential damage and align this with your liability insurance.
You work extensively with post-calculation The final invoice is not fixed in advance and may lead to discussion. Document hours, rates, and material costs transparently, and notify in a timely manner of any overruns.
Additional documents

When is this document not enough?

General terms and conditions govern your standard agreements, but not every situation. In the following cases, you will need additional documents or assistance.

Situation Supplementary document Why
Situation Related document Explanation
You are taking on a larger project with specific agreements regarding work, planning, and delivery Construction contract For custom projects, you record the specific agreements in a contract for services, based on the general terms and conditions.
You work structurally with another party or subcontractor Cooperation Agreement A collaboration agreement regulates roles, costs, and liability between collaborating companies.
Your customer does not pay invoices despite reminders Debt collection In the event of persistent non-payment, you can have your debt collected instead of continuing to try to collect it yourself.
Explanation of this document

Drafting General Terms and Conditions for Installation Companies, why?

Not every entrepreneur knows exactly what general terms and conditions for installation companies are, when you need them, and which risks they must cover. That is why we explain below what this document entails, what you should look out for, and why legal customization is important.

What are the general terms and conditions for an installation company?
General Terms and Conditions for installation companies are the standard clauses applied by an installer to all assignments: central heating installations and heating systems, electrical installations, sanitary and plumbing work, climate control and ventilation, solar panel installations, charging station installations, security installations, and home automation. They regulate matters not exhaustively listed in the quotation: liability for installation damage and consequential damage to the building and inventory, the rules for additional work in the event of unforeseen situations behind walls and ceilings, the warranty on installed equipment and own work, the client's maintenance obligations to retain the warranty, inspection and certification obligations, and payment terms. Installers work with systems that have direct consequences for the safety of residents and users — a faulty gas connection, a defective electrical installation, or a leaking water supply system can lead to fire, explosion, flooding, or personal injury. Well-drafted General Terms and Conditions are essential for an installation company, not only commercially but also from a safety perspective. Our legal experts draft general terms and conditions for installation companies that correctly limit liability for installation damage and consequential damage, watertightly establish the regulations regarding additional work in hidden situations, formulate the warranty on installations and equipment in accordance with industry standards, and correctly address safety inspection obligations.
How do you handle liability for installation damage and consequential damage?
Liability for installation damage presents a unique risk landscape for installation companies. Water damage caused by a leaking fitting, a fire due to an electrical short circuit, carbon monoxide poisoning from a defective drain — these are not hypothetical risks but real consequences of installation errors that are assessed annually in court. Your General Terms and Conditions must carefully structure the liability provisions. The liability of the installation company is limited to damage that is demonstrably the direct result of an attributable shortcoming during installation. Consequential damage to the home, the interior, the inventory, and household contents is expressly excluded for business clients. For consumer clients, complete exclusion of consequential damage in the event of fire, flooding, or injury resulting from a demonstrable installation error is not possible — liability for death or injury is mandatory towards consumers at all times. The maximum amount of liability for business clients is limited to the contract sum of the assignment or the payout under the installation company's liability insurance. Particular point of attention: if the client has requested the installation company to carry out an installation on an existing system whose condition has not been inspected by the installation company, liability for damage related to the condition of the existing system lapses or is reduced. Your General Terms and Conditions must stipulate the inspection obligation when connecting to existing installations. Our legal experts formulate a liability structure that reflects your company's safety practices.
How do you handle the additional work regulations for hidden situations behind walls and ceilings?
Hidden situations in installation work are structural: only when walls are opened or ceilings are removed does it become visible which pipes, cabling, structural elements, or insulation are present. Defective existing cabling that needs to be replaced, insulation suspected of containing asbestos that requires special disposal, an aberrant pipe routing that makes the planned route impossible, or an outdated system that is incompatible with the new installation — any of these situations significantly increases costs. Your General Terms and Conditions must stipulate that the quotation is based on the situation visible and known at the time of measurement. Circumstances that only come to light when walls, floors, or ceilings are considered additional work. Upon the discovery of suspected asbestos materials, there is a legal obligation for investigation and remediation by a certified company — these costs are always borne by the client. Your additional work policy must establish the procedure: the installer informs the client immediately upon the discovery of an unforeseen situation, provides a supplementary quotation, and awaits written approval before incurring the additional costs. In the event of a cost overrun exceeding ten percent of the original contract sum, written agreement is required; for smaller overruns, verbal agreement suffices, provided it is recorded on the work order. Our legal experts draft an additional work arrangement that protects your margin in unforeseen situations.
How do you arrange the warranty on installations and the maintenance obligations of the client?
The warranty on installations consists of two components that your General Terms and Conditions must distinguish: the workmanship warranty on the work performed by the installation company, and the manufacturer's warranty on the installed equipment. The workmanship warranty —typically one to two years on own labor—covers defects resulting from faulty assembly, incorrect material processing, or deviation from applicable standards. It lapses if the client has made modifications to the installation, neglected maintenance to which they were obligated, or had third parties carry out repair work without consultation. The manufacturer's warranty on equipment is passed on to the client and depends on the manufacturer's warranty conditions—the installation company is not independently liable for this. A particular point of attention for central heating installers, heat pump installers, and solar panel installers: many manufacturer's warranties lapse if the system is not maintained annually by a certified installer. Your General Terms and Conditions must stipulate the client's maintenance obligations as a warranty condition: the warranty applies only if the client has the system maintained annually in accordance with the manufacturer's maintenance instructions. Upon signing the contract, the client confirms having received and accepts this maintenance obligation. Our legal experts draft a warranty clause that aligns with the manufacturer's requirements for the equipment you install.
How do you manage safety inspection and certification obligations?
Installers are bound by statutory inspection and certification obligations that vary by branch of installation. For electrical installations, NEN 1010 serves as the standard; an inspection report is required following the completion of a new electrical installation or a substantial modification. For gas installations, KIWA standards and the requirements of the grid operator apply; approval from the grid operator is required for connection to the gas network. For solar panel installations, there is an obligation to notify the grid operator and an obligation for the installation company to possess a recognized installer registration. For charging station installations , the electrical installation must be carried out by a certified installer in accordance with NEN 1010. Your General Terms and Conditions must specify the division of responsibility for inspections and certificates: the installation company ensures execution in accordance with the applicable standards and provides the corresponding inspection report. The client is responsible for applying for the necessary permits and connections from grid operators, unless the installation company has explicitly accepted this assistance as part of the assignment. Damage resulting from missing permits that the client has not applied for is at the client's risk. Our legal experts draft a certification and permit section that aligns with your specific installation sector.
How do you regulate payment terms and the right of suspension?
Installation companies make large material purchases — heating elements, electrical components, sanitary parts — which they pre-finance. Your General Terms and Conditions must specify the payment structure that protects your cash flow. For larger installation contracts: a thirty percent down payment upon awarding the contract for material procurement, an interim payment of forty percent at the start of the work, and the remainder upon completion and delivery of the inspection report. For consumer clients, the statutory limit of twenty percent down payment applies pursuant to Article 7:767 of the Dutch Civil Code. The right of suspension gives the installation company the right to cease work if an overdue payment term is not settled within an agreed rectification period following written notice of default. A particular point of attention regarding unfinished installations: an installation suspended due to an unpaid interim term must be left safe — a gas connection that has been shut off halfway through the work and has not been shut off creates a dangerous situation for which the installation company can be held liable. Your General Terms and Conditions must specify the safety protocols for suspension: the installation company is obliged to safely shut off or temporarily secure the work that has already been opened before work is stopped. Our legal experts draft a payment and suspension arrangement that protects your cash flow without creating security issues.
How does it work at MKBjuristen?
After a brief intake regarding your installation sector, your client portfolio, and your certifications, our legal experts draft general terms and conditions for your installation company that correctly limit liability for installation damage and consequential damage, watertightly establish the rules for additional work in hidden situations, formulate the warranty on installations and equipment in accordance with industry standards, correctly address safety inspection obligations, and ensure payment terms protect your cash flow. Do you already have general terms and conditions? If so, we check them for completeness, compliance with current installation standards — NEN 1010, KIWA, NEN 7250 — and legal validity for consumer clients.
Are you unsure whether your document is legally correct? We would be happy to assess the sensible course of action: drafting, reviewing, or amending.
Request a quote

Why not use a standard document?

A standard document often seems like a quick solution, but usually does not fully align with your company, agreements, risks, and way of working. Our legal experts draft documents that fit your situation.

Standard document
SME Lawyers
Not tailored to your business
Tailored to your company, industry, and working methods
No control over your specific situation
Consultation with a lawyer and assessment of your risks
Possibly outdated or incomplete
Verification of current and practical provisions
No personal explanation
Explanation regarding the use of the document

A standard document seems cheap, until it doesn't fit your situation properly. That is why we provide custom legal solutions tailored to your business.

Customization per installation company

Not every installation company faces the same risks. Therefore, we do not make terms and conditions generic, but tailored to installations, location, materials, maintenance, and customer type.

Electrical Engineering

Attention to safety, standards, testing, distribution boards, lighting, and faults.

Plumbing work

Attention to leakage, accessibility, materials, repair, warranty, and consequential damage.

Climate & ventilation

Attention to capacity, maintenance, usage, breakdowns, and service contracts.

Solar panels & energy

Attention to the roof, connection, monitoring, yield expectation, and guarantees.

Data & security

Attention to cabling, systems, privacy, malfunctions, testing, and liability.

Maintenance & service

Attention to response time, exclusions, components, rates, and cancellation.


General terms and conditions for installation companies must link technical practice and liability. Therefore, we look at scope, materials, access, safety, additional work, delivery, warranty, and maintenance.

Common mistakes in installation company terms and conditions

Things often go wrong at installation companies because the technical scope, existing situation, additional work, and warranty are not sufficiently clearly defined.

  • Do not concretely define technical specifications and assumptions
  • Make no reservation for existing construction or hidden defects
  • Do not confirm additional work and extra parts in writing
  • Do not document delivery, testing, and commissioning
  • Warranty formulated too broadly for parts or misuse
  • Do not separate maintenance and breakdown service
  • Do not limit liability for consequential damages or business losses
  • Do not reject purchasing terms and conditions of contractors or business clients

Draft general terms and conditions for your installation company properly and prevent unnecessary problems in the future. Good terms and conditions prevent disputes regarding installation, additional work, completion, warranty, maintenance, and liability.

Are general terms and conditions mandatory for installation companies?

No, but they are highly recommended because they record agreements regarding installation, materials, planning, additional work, warranty, maintenance, and liability.

How do I arrange additional work for installation work?

Stipulate that additional work, extra parts, or changed situations qualify as additional work and must be confirmed in writing.

Can I limit the warranty on installation work?

Yes, provided care is taken. Distinguish between labor, parts, manufacturer's warranty, maintenance, wear and tear, and misuse.

What do I need to arrange regarding maintenance and breakdowns?

Define response time, parts, exclusions, rates, and service windows.

Can MKB Juristen review existing terms and conditions for my installation company?

Yes. We check, among other things, scope, materials, additional work, delivery, warranty, maintenance, payment, and liability.

Contact us

Annelore Hendriks

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SME Lawyers at the Chamber of Commerce Source: Chamber of Commerce 2019
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