Design stage and as-built SAP calculations from £100. Experienced in-house team covering all Bristol postcodes. Part L compliance for new builds, conversions and extensions.
SAP (Standard Assessment Procedure) is the government-approved methodology for calculating the energy performance of dwellings. It produces an energy rating from 1 to 100+ and is the basis for the energy performance certificates (EPCs) issued on all new homes.
SAP calculations assess a dwelling's energy use and carbon emissions by modelling the building fabric, heating systems, ventilation, lighting and renewable energy sources. They are required to demonstrate compliance with Part L of the Building Regulations (Conservation of Fuel and Power).
Our experienced in-house SAP assessors handle calculations for developments across all Bristol postcodes, from single self-build homes in Westbury-on-Trym (BS9) to large new-build schemes in East Bristol (BS5, BS15, BS16).
Every new dwelling in Bristol requires SAP calculations at both design stage and as-built stage. This applies whether you are building one house or a development of 100 homes.
Converting a barn, office, shop or other building into a dwelling? SAP calculations are required to demonstrate the converted property meets Part L energy standards.
Large extensions or those involving significant changes to heating systems may require SAP calculations. Building control will advise if SAP is needed for your specific project.
Building your own home in Bristol? You will need design stage SAP before work starts and as-built SAP before you can occupy the property. We guide you through the process.
Part L of the Building Regulations sets energy efficiency standards for new and renovated buildings. SAP calculations are the method used to demonstrate that a new dwelling meets these standards.
The as-built SAP calculation directly produces the Energy Performance Certificate (EPC) for the completed dwelling. So if you are building a new home in Bristol, the SAP assessment and the EPC are part of the same process — and we handle both.
Need an EPC for an existing property that is being sold or rented? That uses a different assessment method (RdSAP for domestic, or SBEM for commercial). See our Domestic EPC Bristol or Commercial EPC Bristol services.
To produce your SAP calculations, we typically need the following. Don't worry if you're not sure what to provide — we'll guide you through it.
Floor plans, elevations and sections showing dimensions, window sizes and door positions.
Details of wall, floor and roof construction including insulation types and thicknesses.
Proposed heating system, hot water system, and any renewable energy (solar panels, heat pumps).
U-values, glazing specifications and air permeability data if available.
Our SAP assessors are directly employed — not outsourced. You get consistent quality, fast turnaround and a dedicated point of contact from start to finish.
We handle design stage SAP, as-built SAP and the final EPC all under one roof. No need to coordinate between multiple providers for your Bristol development.
Covering all Bristol postcodes from BS1 to BS16. We work with local builders, architects and building control teams across the city.
From £100
Prices depend on the number of dwellings and complexity of the build. Design stage and as-built can be quoted individually or as a package. Volume discounts available for larger developments. See full pricing for all our services.
SAP calculations in Bristol start from £100. The exact cost depends on the size and complexity of the dwelling and whether you need design stage, as-built or both. Call 0117 304 8347 for a free quote.
SAP (Standard Assessment Procedure) is the government-approved method for assessing the energy performance of dwellings. It produces an energy rating from 1 to 100+ and is required to demonstrate compliance with Part L of the Building Regulations for new builds, conversions and some extensions.
You need a SAP calculation for any new-build dwelling, conversion to a dwelling (such as barn conversions or office-to-residential), or certain extensions. A design stage SAP is typically required before building work begins, and an as-built SAP is required before the building can be occupied.
A design stage SAP is based on architectural drawings and specifications, produced before construction starts to demonstrate Part L compliance to building control. An as-built SAP reflects what was actually constructed, including any changes during the build, and produces the final EPC for the completed dwelling.
Not all extensions require a SAP calculation. However, if the extension is large or involves significant changes to the heating system, building control may request one. Extensions that create a new dwelling (e.g. subdividing a house) will require full SAP calculations.
We cover all Bristol postcodes including BS1, BS2, BS3, BS4, BS5, BS6, BS7, BS9, BS10, BS13, BS14, BS15 and BS16. Our experienced in-house team handles SAP calculations for developments across Central, South, North and East Bristol.
Building a new home or converting a property? You may also need an EPC once the build is complete, or electrical and energy certificates for existing properties.
Get in touch for a free, no-obligation quote from our experienced in-house team.
