Plumbing Contract (Ireland)

A Plumbing Contract in Ireland sets the scope of works, price, programme, and payment terms for the building or installation project, and takes its legal force from the Goods and Supply of Services Act 1980.

For any work involving natural gas or LPG (liquefied petroleum gas) — including the installation or replacement of boilers, gas hobs, gas fires, gas pipework, and pressure testing — the contractor must be RGI-registered (Registered Gas Installers of Ireland). RGI is operated under the Gas Safety Regulations and requires all gas installers to hold appropriate qualifications, maintain insurance, and submit to periodic competency assessment. Only RGI-registered contractors may commission gas appliances, carry out gas tightness tests, and issue the mandatory commissioning certificates required by Gas Networks Ireland and by insurers.

For plumbing works involving connections to the public water supply (including new service connections, the installation of water meters, and works within the curtilage of the boundary), the contractor must comply with Irish Water's (Uisce Éireann's) Infrastructure Development requirements and technical standards under the Water Services Acts 2007 and 2012. Irish Water requires prior approval and connection agreements for new connections to the public water main.

The Sale of Goods and Supply of Services Act 1980 implies mandatory terms into every plumbing contract that the contractor has the necessary skill, will perform the work with due skill, care and diligence, and will use materials that are sound and reasonably fit for purpose. These implied warranties cannot be excluded in consumer contracts.

The Building Regulations (Parts G, H, and J) and the associated Technical Guidance Documents set the mandatory standards for water supply, drainage, and heating appliance installations in all buildings in Ireland. The Health and Safety Authority (HSA) and the Commission for Regulation of Utilities (CRU) jointly oversee the safety framework for gas installations.

The Safety, Health and Welfare at Work Act 2005 and the Construction Regulations (S.I. No. 291 of 2013) impose obligations on both the client and the contractor in relation to health and safety on construction sites. For larger plumbing and heating projects, the client may be required to appoint a Project Supervisor for the Design Process (PSDP) and a Project Supervisor for the Construction Stage (PSCS) under the Construction Regulations. The plumbing contractor, as a principal contractor or a subcontractor, must comply with all applicable health and safety requirements and must have a current Safety Statement under section 20 of the Safety, Health and Welfare at Work Act 2005. A thorough plumbing contract should confirm the contractor's compliance with the Construction Regulations and their obligation to cooperate with the PSCS where one is appointed. For domestic clients, the Home Building Competence Scheme and the Building Control (Amendment) Regulations 2014 (S.I. No. 9 of 2014) have introduced greater accountability and certification requirements for construction works in Ireland, including plumbing and mechanical services. Under the 2014 Regulations, the builder and the assigned certifier are required to provide a Certificate of Compliance on Completion, and all inspections (including of services installations) must be carried out in accordance with the agreed inspection plan. Plumbing contractors working on new builds or substantial extensions must be prepared to cooperate with the assigned certifier and to provide all records and test certificates required to support the Certificate of Compliance on Completion.

An Irish Plumbing Contract is needed whenever a property owner, developer, or main contractor engages a plumbing or gas contractor to install, alter, maintain, or repair plumbing, drainage, or heating systems in a property. A written contract protects both parties by documenting the agreed scope, price, standards, and programme, and by establishing the contractor's certification and warranty obligations.

You need a Plumbing Contract when you are: commissioning the plumbing fit-out of a new dwelling or commercial building, including all cold and hot water supply, drainage, and sanitary ware; engaging a plumber to install or replace a central heating system (gas boiler, heat pump, or oil boiler); replacing or upgrading a gas boiler, water heater, or gas hob; installing a new bathroom, en-suite, or utility room; carrying out an extension or renovation requiring new plumbing, heating, or drainage; commissioning a gas connection or upgrading gas pipework; or engaging a contractor for any significant plumbing or heating works where the scope, price, and RGI registration status need to be documented clearly.

From the client's perspective, the plumbing contract must confirm the contractor's RGI registration (where gas work is involved), define the scope of works precisely (including the fixtures and fittings to be supplied or fitted), specify the required testing and commissioning procedures, and set out the contractor's obligation to issue all required certificates (RGI commissioning certificate, gas tightness test certificate, and — for new connections — Irish Water connection approval documentation).

From the contractor's perspective, the contract documents the agreed price and scope, establishes the client's obligations (including providing access, installing required service connections, and making prompt decisions), provides a basis for claiming additional payments for variations or unforeseen conditions in the existing installation, and protects the contractor against claims for delay caused by the client or other trades.

For properties being sold or let, properly certified plumbing and gas installations are essential. The Building Energy Rating (BER) certificate required for all properties sold or let under the European Communities (Energy Performance of Buildings) Regulations 2012 takes into account the efficiency of the heating system, and prospective buyers and tenants will require evidence that all gas and plumbing installations are certified as safe and compliant.

For residential rental properties, the landlord has additional obligations in relation to gas and plumbing installations. Under the Housing (Standards for Rented Houses) Regulations 2019 (S.I. No. 137 of 2019), every rented dwelling must have a properly functioning heating system capable of providing a room temperature of at least 18 degrees Celsius, and the dwelling must be maintained in good structural condition with all services in good repair. A landlord who engages a plumbing contractor to install, repair, or replace heating or plumbing systems in a rented property should retain the contractor's commissioning certificates, gas safety records, and any Irish Water approval documentation as evidence of compliance with the 2019 Regulations. Under the Residential Tenancies Acts 2004–2024, tenants may refer disputes about the condition of the dwelling — including failures of the heating or plumbing system — to the Residential Tenancies Board (RTB) for dispute resolution.

Under the Companies Act 2014, the Companies Registration Office (CRO) maintains the register of Irish companies. Section 343 of the Companies Act 2014 sets annual confirmation obligations. The Competition and Consumer Protection Commission (CCPC) enforces the Consumer Rights Act 2022. The Central Bank of Ireland regulates financial services under the Central Bank Act 1971. The High Court of Ireland has jurisdiction under Section 212 of the Companies Act 2014.

A thorough Irish Plumbing Contract should include the following key provisions.

The parties clause identifies the client and the plumbing contractor, including the contractor's RGI registration number (where gas works are included), CRO number if the contractor is a company, and confirmation of the contractor's public liability and employers' liability insurance cover.

The scope of works clause defines in detail the plumbing and heating works to be carried out, specifying the systems to be installed or altered (cold water, hot water, central heating, gas, drainage), the fixtures and fittings to be supplied and fitted, and any exclusions (such as tiling around sanitary ware or making good after chasing walls, which may be carried out by other trades). Precise scoping reduces the risk of disputes about what is and is not included in the agreed price.

The standards and compliance clause requires the contractor to carry out all works in accordance with the current BSEN standards applicable to plumbing and gas installations (including I.S. 813 for domestic gas installations), the Building Regulations (Parts G, H, and J), TGD G, TGD H, and TGD J, the Gas Safety Regulations, and all Irish Water technical standards and connection requirements.

The price and payment clause specifies the agreed contract price (inclusive or exclusive of VAT at the applicable rate — standard rate 23% or reduced rate 13.5% for qualifying works under the VAT Consolidation Act 2010), the payment schedule (for example, staged payments on completion of defined milestones), and the basis for pricing any additional or varied works arising during the project. The contract should specify the mechanism for agreeing and authorising variations in advance to avoid post-completion disputes about additional costs.

The programme clause should specify the agreed start date, the programme of works, and the target completion date. Where the client requires the works to be completed by a specific date (for example, before a house sale or a new tenancy commences), this should be expressly stated and the consequences of delay addressed.

The certification clause requires the contractor to carry out all required pressure testing and commissioning procedures, to issue an RGI commissioning certificate (for gas works), to provide a gas tightness test certificate, and to submit all required documentation to Gas Networks Ireland and Irish Water as applicable.

The defects liability clause requires the contractor to remedy any defects in the installation appearing within the defects liability period (typically 12 months after completion) at the contractor's own cost, distinguishing between defects in workmanship and faults in manufacturer-supplied equipment covered by product warranties. The contract should specify the procedure for notifying defects and the timeframe for remediation.

The insurance clause requires the contractor to maintain public liability insurance of at least EUR 2.5 million per occurrence and employers' liability insurance of at least EUR 13 million, and to produce evidence of cover on request.

The dispute resolution clause should specify that any disputes arising from the contract will first be referred to negotiation between the parties, then to mediation under the Mediation Act 2017, and ultimately to the Irish courts (District Court for claims up to EUR 15,000, Circuit Court for claims up to EUR 75,000, or the High Court for larger claims). The governing law clause confirms the contract is governed by the laws of Ireland. Under the European Communities (Late Payment in Commercial Transactions) Regulations 2012 (S.I. No. 580 of 2012), implementing EU Directive 2011/7/EU, the contractor is entitled to statutory interest at 8 percentage points above the ECB reference rate on late payments by business clients, plus a fixed compensation of EUR 40 per late invoice. For VAT purposes, qualifying energy-efficient heating and insulation works carried out on qualifying residential properties attract VAT at the reduced rate of 9% under section 86 of the Value-Added Tax Consolidation Act 2010, rather than the standard 13.5% rate for general construction services — the contract should confirm the correct VAT rate applicable to the works. The forms-legal.com Plumbing Contract (Ireland) template covers the mandatory elements under Companies Act 2014.