How much does an air tightness test cost?
An air tightness test typically costs £150 to £350 for one house or flat. The typical price is about £225.
£150 to £350
For one house or flat · typically about £225
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 |
|---|---|
| Single house, standalone test | £200 to £350 |
| Additional plots on the same visit and site | £40 to £60 per test |
| Test as part of a retrofit package | £100 to £200 |
| Cheapest advertised start price (small unit) | from £95 to £200 |
What changes the price
- Dwelling size and type (flat, terrace, detached)
- Number of plots tested in one visit (sampling vs every plot)
- Travel distance and location
- Whether leak-sealing, pre-tests or retests are included
- Access and readiness of the building at test time
- Combined booking with SAP calculations
Testing more than one plot
The first test on a visit carries the travel and set-up cost. Further plots on the same site and visit are commonly priced at roughly £40 to £60 each, so testing a whole development on one day is much cheaper per home than separate visits.
How to get a fair quote
- If you have several plots, ask whether the price covers the whole visit. Extra plots tested on the same visit are usually a fraction of the first test.
- Ask what happens if the home fails, and what a re-test costs.
- 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 does an air tightness test cost?
An air tightness test typically costs £150 to £350 for one house or flat. The typical price is about £225. 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, terrace, detached); number of plots tested in one visit (sampling vs every plot); travel distance and location; whether leak-sealing, pre-tests or retests are included.
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 air tightness testing?
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.
- Trade2Base - Air tightness testing UK
- Axiom Eco Homes - Air tightness test costs (2026)
- Air Leakage Testing - Pricing
- AirTightnessTesting.co.uk - Pricing
- EasyEPC - Air permeability test
- UK Building Compliance - Pricing
Read next: what air tightness testing is and when you need it.