Heating Engineer Contract (UK)
This Heating Engineer Contract (the “Contract”) is entered into on [Contract Date] between:
[Client Name], of [Client Address], [Client City], [Client Postcode] (hereinafter referred to as the “Client”); and
[Engineer Name], of [Engineer Address], [Engineer City], [Engineer Postcode] (hereinafter referred to as the “Engineer”).
The Client and the Engineer are referred to collectively as the “Parties”.
1. SCOPE OF WORKS
1.1 The Engineer agrees to carry out the following works (the “Works”) at [Property Address], which is [Property Type]. The Works comprise [Heating Works Type].
1.2 The Works to be performed are as follows: [Work Description].
1.3 The Engineer shall carry out all Works in a good and workmanlike manner, using materials and components of satisfactory quality and fit for purpose, in accordance with section 49 of the Consumer Rights Act 2015 and section 13 of the Supply of Goods and Services Act 1982.
1.4 All Works shall comply with the requirements of the Building Regulations 2010 (SI 2010/2214), in particular Approved Document L1A or L1B (Conservation of Fuel and Power) and Approved Document J (Combustion Appliances and Fuel Storage Systems) where applicable. Where the Works are notifiable under the Building Regulations, the Engineer shall notify the relevant local authority building control body or, where applicable, submit a self-certification notification through an approved Competent Person Scheme.
1.5 All Works shall also comply with the requirements of the Energy Efficiency (Private Rented Property) (England and Wales) Regulations 2015 (as amended) and, for new boiler installations, the Boiler Plus standards introduced by the Energy Efficiency (Installation of Energy-Saving Materials) Regulations 2022, which require the installation of certain heating controls alongside new boilers.
2. CONTRACT PRICE AND PAYMENT
2.1 The Client shall pay the Engineer the sum of £[Contract Price] (the “Contract Price”) for the Works. [Vat Status].
2.2 Note: Under the Value Added Tax Act 1994 and HMRC Notice 708/6, the installation of energy-saving materials (including heat pumps, solar thermal systems, and certain insulation) in domestic properties may qualify for a reduced rate of VAT at 5%. The parties should confirm the applicable VAT treatment with HMRC or a qualified tax adviser.
2.3 Payment shall be made in accordance with the following terms: [Payment Terms].
2.4 If the Client fails to make any payment on the due date, the Engineer may charge interest on the overdue amount at the rate of 8% per annum above the Bank of England base rate pursuant to the Late Payment of Commercial Debts (Interest) Act 1998, and may (after giving 7 days’ written notice) suspend the Works.
2.5 Where the scope of the Works is varied by agreement (including as a result of unforeseen site conditions), the Parties shall agree the price for any variation in writing before the variation is carried out.
3. PROGRAMME AND COMPLETION
3.1 The Engineer shall commence the Works on or about [Start Date] and shall use reasonable endeavours to complete the Works by [Completion Date].
3.2 The Engineer shall notify the Client promptly of any anticipated delay and its cause. Delays caused by the Client, supply chain issues affecting the availability of equipment, or the discovery of unforeseen conditions at the property (such as asbestos, pre-existing pipework defects, or inadequate gas supply pressure) shall entitle the Engineer to a reasonable extension of the programme.
3.3 On practical completion, the Engineer shall commission the heating system in accordance with the manufacturer’s instructions and the relevant British Standards, and shall demonstrate the operation of the system and all controls to the Client. The Engineer shall provide the Client with all commissioning records, certificates, manuals, and warranties.
4. DEFECTS LIABILITY AND WARRANTIES
4.1 The Engineer provides a workmanship warranty: the Works will be free from defects in workmanship for [Defects Period] following practical completion. During this period, the Engineer shall remedy any defect arising from faulty workmanship promptly and at no additional cost to the Client.
4.2 Manufacturer warranty: [Manufacturer Warranty]. The Engineer shall carry out all necessary steps to register the Client’s equipment for the manufacturer’s warranty and shall advise the Client of any maintenance obligations required to keep the warranty valid.
4.3 The workmanship warranty does not cover defects caused by the Client’s failure to carry out manufacturer-recommended maintenance, fair wear and tear, wilful damage, or events beyond the Engineer’s control.
4.4 In accordance with the Limitation Act 1980, the Client may bring a claim in contract within 6 years of the breach (or 12 years if this Contract is executed as a deed).
5. HEALTH AND SAFETY
5.1 The Engineer shall comply with all applicable health and safety legislation, including the Health and Safety at Work etc. Act 1974, the Management of Health and Safety at Work Regulations 1999, and the Gas Safety (Installation and Use) Regulations 1998.
5.2 The Engineer shall not commission or leave in service any gas appliance that is unsafe or not to current standards. Where an unsafe appliance is discovered at the property, the Engineer shall advise the Client in writing and, if necessary, issue an “At Risk” or “Immediately Dangerous” notice and disconnect the appliance in accordance with the Gas Industry Unsafe Situations Procedure.
5.3 The Client shall inform the Engineer of any known hazards at the property (including asbestos, structural defects, or inadequate ventilation) before works commence. Where asbestos is suspected or discovered during the Works, the Engineer shall immediately cease work in the affected area and notify the Client.
6. LIABILITY AND EXCLUSIONS
6.1 The Engineer shall be liable to the Client for any loss or damage to the property directly caused by the Engineer’s negligence or breach of this Contract.
6.2 The Engineer shall not be liable for any indirect or consequential losses, including loss of use, business interruption, or loss of rental income.
6.3 Nothing in this Contract shall limit or exclude liability for death or personal injury caused by negligence, fraud, or any other matter that cannot be excluded under the Unfair Contract Terms Act 1977 or the Consumer Rights Act 2015.
6.4 Subject to clause 9.3, the Engineer’s total liability to the Client under this Contract shall not exceed the Contract Price.
7. GENERAL PROVISIONS
7.1 A person who is not a party to this Contract shall have no right to enforce any of its terms under the Contracts (Rights of Third Parties) Act 1999.
7.2 This Contract constitutes the entire agreement between the Parties relating to the Works and supersedes all prior agreements and understandings.
7.3 No amendment or variation of this Contract shall be effective unless made in writing and signed by both Parties.
7.4 In the event of any dispute arising under this Contract, the Parties shall first attempt to resolve the matter by good faith negotiation within 14 days. If the dispute cannot be resolved by negotiation, either Party may refer the matter to mediation. Where the Engineer is a member of a trade association with an ADR scheme (such as the Heating and Hotwater Industry Council (HHIC) or CORGI HomePlan), either Party may seek to use that scheme.
7.5 This Contract and any dispute or claim arising out of or in connection with it shall be governed by and construed in accordance with the laws of England and Wales. The Parties irrevocably submit to the exclusive jurisdiction of the courts of England and Wales.
IN WITNESS WHEREOF, the Parties have executed this Heating Engineer Contract as of the date first written above.
THE CLIENT
Full name: [Client Name]
Address: [Client Address], [Client City], [Client Postcode]
THE ENGINEER
Full name / Company name: [Engineer Name]
Address: [Engineer Address], [Engineer City], [Engineer Postcode]
Client
________________
Signature
Date: ________________
Engineer
________________
Signature
Date: ________________
What Is a Heating Engineer Contract (UK)?
A Heating Engineer Contract in the United Kingdom sets the scope of works, price, programme, and payment terms for the building or installation project, and is shaped by the Employment Rights Act 1996.
Heating engineering in the United Kingdom is a heavily regulated profession. Any engineer carrying out gas work — including the installation, maintenance, or repair of gas boilers, gas fires, and gas pipework — must be registered with the Gas Safe Register under the Gas Safety (Installation and Use) Regulations 1998. Working on gas appliances without Gas Safe registration is a criminal offence. A well-drafted heating engineer contract should always confirm the Gas Safe registration number of the engineer carrying out the gas work.
For new boiler installations in existing domestic properties in England, the Boiler Plus standards introduced through changes to the Building Regulations require that new boilers be condensing boilers and that certain heating controls (such as weather compensation, load compensation, or smart controls) be installed alongside the new boiler. These requirements reflect the government's commitment to improving the energy efficiency of the housing stock and reducing carbon emissions from space heating, which accounts for approximately 20% of the UK's total carbon emissions.
The heating sector is also at the forefront of the transition to low-carbon heating systems. The installation of heat pumps — both air source and ground source — is growing rapidly, driven by government incentives including the Boiler Upgrade Scheme (which provides grants of up to £7,500) and the requirement under the Heat and Buildings Strategy to phase out the installation of new gas boilers in new homes. Heat pump installers must hold F-gas qualification to handle refrigerants and should be certified by the Microgeneration Certification Scheme (MCS) to carry out installations that qualify for government grants.
A Heating Engineer Contract is distinct from a standard service agreement. It must address the specific regulatory requirements that apply to gas and heating work, including the obligation to notify certain works to the local authority building control body under the Building Regulations, the obligation to issue relevant Gas Safe certificates on completion, and — for heat pump installations — the obligation to register the installation with MCS and comply with installation standard MIS 3005.
The legal framework governing the Heating Engineer Contract (UK) in United Kingdom draws on several key statutes and regulatory bodies. Under the Employment Rights Act 1996, the Employment Tribunal adjudicates workplace disputes. Section 94 of the Employment Rights Act 1996 provides the right not to be unfairly dismissed. The Advisory, Conciliation and Arbitration Service (ACAS) provides early conciliation under Section 18A of the Employment Tribunals Act 1996. The UK GDPR and Data Protection Act 2018 govern personal data handling. HM Revenue and Customs (HMRC) administers PAYE and National Insurance contributions under the Income Tax (Earnings and Pensions) Act 2003. Parties executing a Heating Engineer Contract (UK) in United Kingdom should confirm the document reflects current law, including any amendments enacted since the original drafting date. The Employment Rights Act 1996 sets the foundational requirements.
When Do You Need a Heating Engineer Contract (UK)?
A written Heating Engineer Contract should be put in place before any heating installation, major repair, or service work begins. There are several situations in which a formal contract is particularly important.
For new boiler installations, a written contract is essential to set out the specification of the boiler to be installed, the scope of associated works (such as new pipework, radiator upgrades, and controls), the contract price, the payment structure, and the Boiler Plus compliance obligations. Without a written contract, disputes frequently arise about whether the agreed scope of work included the replacement of specific radiators, the installation of a new magnetic filter, or the flushing of the existing pipework.
For heat pump installations, a written contract is critical for setting out the complex regulatory requirements that apply to these works, including F-gas compliance, MCS certification requirements, and the obligations relating to the Boiler Upgrade Scheme grant. The contract should make clear whether the contract price is before or after the grant has been deducted, and what happens if the grant application is rejected.
For landlords and property managers commissioning annual gas safety inspections and boiler servicing under the Gas Safety (Installation and Use) Regulations 1998, a written contract establishes a clear record of the obligation to carry out annual checks and provides evidence of compliance in the event of any regulatory investigation.
For large commercial heating projects, a written contract is essential for coordinating the heating engineer's work with other trades, setting out the programme, and managing the risk of delays and variations. A formal written contract also confirms that the engineer's obligations under CDM 2015 (the Construction (Design and Management) Regulations 2015) are clearly documented.
Finally, a written heating engineer contract is important for insurance purposes. Most professional indemnity and public liability insurance policies require that the engineer's contractual obligations are consistent with the level of cover provided, and a well-drafted contract confirms that the engineer's liability is appropriately limited.
What to Include in Your Heating Engineer Contract (UK)
A well-drafted Heating Engineer Contract for use in England and Wales should include several key provisions to protect both the client and the heating engineer.
The scope of works clause should clearly describe all works to be carried out, including the specific equipment to be installed (with make and model), the scope of pipework and control installation, the commissioning process, and any works to be carried out to the existing system (such as flushing or balancing). Vague descriptions such as 'install new boiler' frequently give rise to disputes about what was included.
The regulatory compliance clause should confirm the engineer's Gas Safe registration number (for any gas work) and the Competent Person Scheme under which Building Regulations notifications will be made. For heat pump installations, it should confirm F-gas certification and MCS certification details.
The Boiler Plus compliance clause (for new gas boiler installations) should confirm which Boiler Plus control measure is to be installed alongside the new boiler and should state that the installation will comply with the requirements of the Building Regulations Approved Document L.
The manufacturer warranty clause should describe the warranty applicable to the equipment installed, the registration requirements to activate the warranty, and the engineer's obligations to carry out the registration on the client's behalf.
The contract price and payment terms clause should state the agreed price, the applicable VAT rate (noting the zero-rating for heat pump installations until 2027 and the 5% reduced rate for certain other energy efficiency measures), and the payment structure. For heat pump installations under the Boiler Upgrade Scheme, the clause should explain the grant arrangement clearly.
The certificates and documentation clause should set out the engineer's obligation to provide the client with all required certificates (including the Building Regulations Compliance Certificate, Gas Safe certificate, and MCS certificate where applicable) and operating manuals on completion.
The defects liability clause should specify the workmanship warranty period and make clear that the engineer will return to remedy any defect in workmanship at no charge during that period, while making clear that manufacturer defects are subject to the manufacturer's own warranty process.
Additional compliance elements for a Heating Engineer Contract (UK) used in United Kingdom include: Under the Employment Rights Act 1996, the Employment Tribunal adjudicates workplace disputes. Section 94 of the Employment Rights Act 1996 provides the right not to be unfairly dismissed. The Advisory, Conciliation and Arbitration Service (ACAS) provides early conciliation under Section 18A of the Employment Tribunals Act 1996. The UK GDPR and Data Protection Act 2018 govern personal data handling. HM Revenue and Customs (HMRC) administers PAYE and National Insurance contributions under the Income Tax (Earnings and Pensions) Act 2003. Forms-legal.com provides this template as a starting point for United Kingdom-compliant documentation.
Cite this page
Reference this free template in an article, syllabus, or research note:
Forms Legal. (2026). Heating Engineer Contract (UK) (United Kingdom) [Legal document template]. Forms Legal. https://forms-legal.com/uk/employment/contractor-agreements/heating-engineer-contract-uk
"Heating Engineer Contract (UK) (United Kingdom)." Forms Legal, 2026, https://forms-legal.com/uk/employment/contractor-agreements/heating-engineer-contract-uk.
@misc{formslegal-heating-engineer-contract-uk,
author = {{Forms Legal}},
title = {Heating Engineer Contract (UK) (United Kingdom)},
year = {2026},
howpublished = {\url{https://forms-legal.com/uk/employment/contractor-agreements/heating-engineer-contract-uk}},
note = {Free legal document template. Based on Employment Rights Act 1996}
}Also available for these jurisdictions:
Frequently Asked Questions
Yes. Under regulation 3 of the Gas Safety (Installation and Use) Regulations 1998, it is a criminal offence for any person to carry out gas work (including the installation, maintenance, repair, or disconnection of gas appliances, pipework, or flues) unless they are, or are supervised by, a Gas Safe registered engineer. The Gas Safe Register is the official list of engineers in the United Kingdom who are competent and legally entitled to work on gas appliances. Hiring an unregistered person to carry out gas work is not only a criminal offence (punishable by a fine or imprisonment) but also invalidates most home insurance policies and landlord gas safety obligations. Clients should always verify an engineer's Gas Safe registration at GasSafeRegister.co.uk before work commences. Each registered engineer carries a Gas Safe ID card showing the type of gas work they are qualified to carry out.
Boiler Plus is a government standard for new gas boiler installations in domestic properties in England, introduced through changes to the Building Regulations (Approved Document L) and the Energy Efficiency (Private Rented Property) (England and Wales) Regulations. It requires that all new gas boilers installed in existing domestic properties must be condensing boilers and must be installed with certain heating controls to improve energy efficiency. Specifically, for combination boilers (the most common type), the engineer must install one of the following alongside the new boiler: weather compensation controls, load compensation controls, a flue gas heat recovery device, or a smart heating control. These controls are designed to reduce the energy consumption of the heating system and lower carbon emissions. Boiler Plus requirements do not apply to new-build properties (which are covered by the higher standards of Approved Document L1A) or to commercial properties.
Heat pump systems use fluorinated greenhouse gases (F-gases) as refrigerants, and the handling of these gases is regulated by Regulation (EU) No 517/2014 as retained and amended in UK law following Brexit. Under this regulation, any person who installs, services, repairs, or decommissions equipment containing F-gases must hold a valid F-gas qualification issued by an UKAS-accredited certification body recognised by the Environment Agency. The relevant qualification for heat pump engineers in England and Wales is typically the City & Guilds 2079 (Refrigerant Handling) certificate or an equivalent REFCOM-approved qualification. Engineers without a valid F-gas certificate must not handle the refrigerant circuit of a heat pump. In addition to F-gas certification, heat pump installers who wish to carry out MCS-certified installations (required to access the Boiler Upgrade Scheme grant) must be certified by the Microgeneration Certification Scheme (MCS) to installation standard MIS 3005.
The Boiler Upgrade Scheme (BUS) is a government grant scheme administered by Ofgem that provides upfront capital grants to homeowners and small non-domestic properties in England and Wales who install eligible low-carbon heating systems, including air source heat pumps (currently £7,500), ground source heat pumps (currently £7,500), and biomass boilers (currently £5,000). To access the BUS grant, the installation must be carried out by an MCS-certified installer and the installed equipment must meet MCS standards. The installer typically claims the grant directly from Ofgem and passes it to the client as a reduction in the contract price. When drafting a heating engineer contract for a heat pump installation, it is important to clarify whether the contract price is before or after the grant has been deducted and to set out the obligations of each party in relation to the grant application process. The BUS is currently set to run until 2028 under the Energy Act 2023.
On completion of a new boiler installation or any notifiable gas work, a Gas Safe registered heating engineer in England and Wales must provide the client with a number of certificates and documents. The most important is the Building Regulations Compliance Certificate (BRCC), which confirms that the installation meets the relevant Building Regulations requirements (including Approved Document J for combustion appliances and Approved Document L for energy efficiency). The BRCC is issued through the Gas Safe Register's Competent Person Scheme, and a copy is automatically sent to the local authority building control body. For rental properties, the engineer must also issue a Landlord Gas Safety Record (CP12) following the annual service of any gas appliances. If a new boiler is installed, the engineer should also register the appliance with the manufacturer to activate the warranty, provide the client with the boiler's user manual and installation manual, issue a system commissioning record confirming that the central heating system has been balanced and pressurised correctly, and complete any documentation required by the Boiler Upgrade Scheme if applicable.
The VAT treatment of heating installations in the UK depends on the type of work and the type of property. Under the Value Added Tax Act 1994 and HMRC Notice 708/6 (Buildings and Construction), the standard rate of VAT (currently 20%) applies to most heating installations. However, the installation of certain energy-saving materials — including heat pumps, solar thermal systems, and certain forms of insulation — in residential premises qualifies for the reduced rate of VAT at 5%. Following changes made by the Spring Statement 2022, the installation of heat pumps and solar panels in residential properties in Great Britain is currently zero-rated for VAT (0%) until 31 March 2027. The reduced rate of 5% applies to certain other energy efficiency measures. The standard rate of 20% continues to apply to gas boiler installations in most circumstances, although there are limited exceptions for older dwellings. The applicable VAT rate is a complex area and both parties should seek specific advice from HMRC or a qualified tax adviser if uncertain.
This template is provided for informational purposes only and does not constitute legal advice. Laws vary by jurisdiction and change over time. Consult a qualified attorney for advice specific to your situation.Full disclaimer
Found an error? Let us knowRelated Documents
You may also find these documents useful:
Plumbing Contract (UK)
Create a professional Plumbing Contract for England and Wales. Covers Building Regulations 2010, Water Supply (Water Fittings) Regulations 1999, Gas Safe registration for gas work, WaterSafe and CIPHE accreditations, defects liability, and consumer rights under the Consumer Rights Act 2015.
Building Contract (UK)
Create a legally compliant Building Contract for construction works in England and Wales. Covering payment notices under the Housing Grants, Construction and Regeneration Act 1996, CDM 2015 obligations, defects liability, liquidated damages for delay, retention, adjudication rights, and Building Safety Act 2022 compliance — this template is suitable for residential extensions, commercial fit-outs, and new build projects.
Electrical Contract (UK)
Create a professional Electrical Contract for England and Wales. Covers Electricity at Work Regulations 1989, BS 7671 wiring regulations (18th Edition), Part P Building Regulations compliance, NICEIC/NAPIT/ELECSA registration, testing and certification, and consumer rights under the Consumer Rights Act 2015.
Home Renovation Contract (UK)
Create a Home Renovation Contract compliant with the Consumer Rights Act 2015 and Consumer Contracts Regulations 2013 for building and renovation works in England and Wales. This template protects both homeowners and contractors, covering scope of works, price and payment, start and completion dates, Building Regulations responsibility, materials, workmanship guarantee, the 14-day consumer cancellation right, and dispute resolution under English law.
Service Agreement (UK)
Create a detailed UK service agreement governed by the laws of England and Wales. Covers the Consumer Rights Act 2015, Supply of Goods and Services Act 1982, Late Payment of Commercial Debts (Interest) Act 1998, UK GDPR, IR35, VAT, intellectual property, and confidentiality. Suitable for consultants, freelancers, agencies, and businesses of all sizes.