Price guide · Updated 6 October 2026

How much do SAP calculations cost?

SAP calculations typically cost £90 to £375 per home, design stage and as-built together. The typical price is about £180.

Typical UK price

£90 to £375

Per home, design stage and as-built together · typically about £180

Prices are typical UK ranges drawn from firms’ published prices and cost guides, last checked 6 October 2026. They are a guide only: every firm sets its own prices, so get quotes for your own project. Some firms quote before VAT and some include it, so ask which a quote is.

Example prices

Job	Typical price
Flat, design + as-built SAP	£90 to £120
Semi-detached house, both stages	£120 to £195
Large detached house, both stages	£160 to £375
Five+ bedroom or complex bespoke home	£375 and up

What changes the price

Dwelling size and type (flat vs semi vs large detached)
Number of plots and repeated house types on a site
Complexity of form, heating system and renewables (heat pump, PV, MVHR)
Number of design revisions and fabric/spec iterations
Whether water calc, air test or EPC bundled in
Turnaround speed and assessor accreditation/PI cover

Why quotes for the same house differ

Most low prices you will see online are “from” prices for a simple single home. A large detached house, a heat pump or solar panels, or several rounds of design changes all add time. Compare what each quote includes before you compare the totals.

How to get a fair quote

Ask whether the quote covers both the design-stage and as-built SAP, the on-construction EPC, and a set number of design revisions.
On a site with several identical plots, ask for a per-plot price: repeat house types are usually cheaper.
Get at least three quotes for the same job, and compare what each includes as well as the total.
Check the provider’s accreditation. See how we check listings.

Common questions

How much do SAP calculations cost?

SAP calculations typically cost £90 to £375 per home, design stage and as-built together. The typical price is about £180. Some firms quote before VAT and some include it, so ask which a quote is.

Why do quotes vary so much?

The main things are: dwelling size and type (flat vs semi vs large detached); number of plots and repeated house types on a site; complexity of form, heating system and renewables (heat pump, PV, MVHR); number of design revisions and fabric/spec iterations.

Does the price include VAT?

Some firms quote before VAT and some include it, so ask which a quote is. Always check before you accept.

How do I get a fair price for SAP calculations?

Get at least three quotes for the same job, and compare what each includes as well as the total. Check the provider’s accreditation and ask for a fixed price where you can.

Where these prices come from

Researched in October 2026 from the sources below, which we compared against each other. Where sources disagreed we used the range that covered most quotes. These sites are independent of us.