Compliance Checklist for London Property Developers: Plumbing, Gas, and Electrical

Building Regulations Compliance for London Residential Developments

The primary statutory compliance requirement for a London residential development is the Building Regulations completion certificate from the Building Control body that has overseen the project. This certificate confirms that the development has been inspected at key stages and that the inspector is satisfied that the work has been carried out in accordance with the approved drawings and the requirements of the Building Regulations. For developers using a private approved inspector rather than the local authority Building Control service, the certificate takes the form of a final certificate issued by the approved inspector. The completion certificate or final certificate should be obtained for every dwelling in the development, and copies should be retained in the developer records and provided to purchasers on legal completion.

Alongside the Building Regulations completion certificate, a number of discipline-specific compliance documents must be in place for a London residential development. The gas installations in each dwelling must be covered by a Gas Safe commissioning record, typically completed on the Benchmark commissioning checklist, which records the details of the boiler or gas appliance installation, the commissioning data, and the Gas Safe registered engineer who carried out the installation. The electrical installation in each dwelling must be covered by an Electrical Installation Certificate or a Minor Electrical Installation Works Certificate, issued by the NICEIC or NAPIT registered electrician who completed the electrical installation, confirming that the installation complies with BS 7671. These certificates must be provided to Building Control and to the purchaser as part of the legal completion documentation.

Water Regulations and Thames Water Compliance for London Developers

The Water Supply (Water Fittings) Regulations 1999 require that all plumbing installations in new London dwellings comply with the requirements of the Water Regulations, and that any installation that could contaminate the public water supply is carried out only by an approved contractor and is notified to the water supplier before work commences. In London, Thames Water is the relevant water supplier, and a notification to Thames Water is required for any new water supply connection, any significant alteration to the cold water system, and any installation of a system that includes a connection to a non-mains water source such as a rainwater harvesting system. Thames Water may inspect the installation before and after completion, and the developer should retain records of the notification and any inspection correspondence as part of the building completion file.

For London developments that required Thames Water build over agreements, drainage impact assessments, or sewer connection agreements as part of the development process, the relevant Thames Water acceptance documents should be retained in the completion file and referenced in the legal completion pack. Purchasers of new London dwellings will often ask their solicitors to check that all statutory utility agreements have been properly obtained and discharged, and missing documentation can cause delays at the legal completion stage. The water efficiency compliance calculation under Part G of the Building Regulations, which demonstrates that each dwelling meets the applicable water consumption standard, must also be completed and submitted to Building Control as part of the completion documentation. Prestige Engineers provide compliance documentation packages for London residential developers, including Gas Safe commissioning records, water efficiency calculations, and Building Regulations certificates across all London boroughs.

Fire Safety and Drainage Compliance for London Residential Developments

London residential developments must also comply with fire safety requirements that have implications for building services installations. The fire strategy for the development will specify the fire resistance requirements for penetrations in fire-rated floors and walls made by plumbing and heating pipework, the requirements for fire dampers or intumescent collars where services penetrate compartment boundaries, and the requirements for fire stopping around all service penetrations. The building services contractor must ensure that all penetrations are fire-stopped in accordance with the approved fire strategy, and the fire stopping works should be inspected and certified by the fire safety consultant or Building Control inspector before the floors and walls are finished.

The drainage installation for the development must be tested and certified before practical completion. A hydraulic pressure test should be carried out on all pressure pipework, and a water flow test should be carried out on the drainage system to confirm adequate drainage rates. For developments that included new public sewer connections, the Thames Water connection agreement must be discharged and the connection inspected and approved by Thames Water before the drainage system is brought into service. CCTV surveys of the completed drainage system may be required by Building Control or by the build over agreement conditions, and the CCTV survey reports should be retained in the completion file. Prestige Engineers co-ordinate all of these compliance elements for London residential developers and can provide a single point of accountability for the plumbing, gas, drainage, and water regulatory sign-offs required at practical completion.