SAP Rating Pricing
New Build Dwellings
For developers, architects, and contractors working on individual homes or larger sites.
Single Dwelling: from £200 + VAT (depending on size and complexity)
Multiple Units (2–10): from £150/unit + VAT
Larger Developments (11+ units):POA (discounted bulk pricing available)
Includes:
Full SAP calculation (design stage + as-built)
Part L compliance check
EPC lodgement
Support with building control queries
Common Questions About SAP Ratings
What is a SAP rating?
A SAP rating (Standard Assessment Procedure rating) is a government-approved measure of a home’s energy efficiency and carbon emissions. It’s a critical part of Building Regulations compliance for new dwellings in the UK (specifically Part L).
A SAP rating calculates how much energy a home uses for heating, hot water, lighting, and ventilation, and how much CO₂ it emits. The higher the rating, the more energy-efficient the home.
How long does the process take?
Standard turnaround is 15 working days from receipt of complete information. Need it faster? Contact us for expedited service options.
What information do I need to provide?
You'll need to submit dwelling drawings and complete our SAP data form. Our online process guides you through exactly what's required.
What if my building doesn't meet compliance standards?
We don't just deliver bad news. If your initial assessment falls short, we provide practical recommendations to achieve compliance without extensive revisions.
Is your assessment recognised by building control?
Absolutely. All our SAP ratings utilise Building Research Establishment (BRE) approved software and are fully submittable to building control authorities throughout the UK.
How is it scored?
- 100 = Zero energy cost (i.e., energy-neutral)
- Over 100 = Home generates more energy than it uses (net-positive)
- Lower scores mean higher energy use and worse performance
- It’s used to produce the EPC (Energy Performance Certificate) for the home.
When do you need a SAP rating?
- All new build homes
- Conversions (e.g., barns to houses, office to flats)
- Some extensions (especially with large glazing areas)
What's included in a SAP assessment?
- Fabric performance (walls, roof, windows)
- Heating and hot water system
- Ventilation system
- Lighting efficiency
- Renewable technologies (solar PV, heat pumps, etc.)
- Thermal bridging (psi-values, junctions)
- Airtightness
Why it matters?
- Ensures compliance with Building Regulations (Part L)
- Required for planning approval, Building Control sign-off, and EPCs
- Helps inform design decisions to improve performance, cut energy bills, and reduce emissions
Testimonials
“We, at Redrow Homes, have been using Watt for the past few years. They have always delivered promptly; meeting our sometimes demanding timescales without failure.”
"We have been working with Watt for several years now and their involvement in our business has grown steadily due to the fact that they consistently continue to provide excellent, cost effective advice and have an ability to articulate complicated aspects of mechanical and electrical design implications to their client in such a way as it is understandable and as such effective decisions can be taken. They have assisted us with design advice, performance specifications, EPCs and more recently targetting Net Zero Carbon and the evolving green agenda. Most importantly from my perspective, they are a very personable set of people who can integrate well into design teams and deliver first class advice."
"I have worked with Watt Energy & Consulting for over three years and found them to be very responsive. We are constantly under pressure to deliver on SAP, Part L assessments, and Energy reports and with Watts’ close support on numerous occasions, have been impressed with their continued high level of performance and keeping to deadlines."
Carver's Warehouse,
77 Dale Street,
Manchester, M1 2HG
Phone: +44 (0)161 434 3103
Mail: [email protected]
© Watt Energy & Consulting Engineers Limited | All rights reserved