Heat loss survey + thermal imaging
£450–£750
The full heat loss survey plus a thermal camera report showing exactly where heat escapes.
Credited against your installation if you go ahead
Surveys and assessments
Surveys done properly — credited if you go ahead
Heat loss, thermal imaging, air-tightness, EPC and retrofit surveys, bookable online. Paid surveys are credited against your installation if you go ahead within 90 days.
Heat loss surveys
The survey every heat pump starts with
MCS-certified heat pump installations — the kind the £7,500 Boiler Upgrade Scheme grant needs — must be designed from a room-by-room heat loss calculation. Ours measures every room and sizes the heat pump and radiators to match.
Choose your home's size to see the price.
- Every room, wall, window, floor and roof measured
- Calculated to MCS standards (BS EN 12831)
- Credited against your installation if you go ahead within 90 days
Heat loss survey: 3–4 bed house
£325–£450
- Every room, wall, window, floor and roof measured
- Room-by-room heat loss to MCS standards (BS EN 12831)
- Heat pump and radiator sizing
- Written report
Credited against your installation if you go ahead within 90 days
Want to see where heat escapes too? Add thermal imaging (£450–£750 in total)
Room-by-room or zone heat loss for heating and HVAC design in commercial buildings.
Credited against your installation if you go ahead
The right size, first time
An oversized heat pump costs more to buy and run; an undersized one leaves rooms cold. Measuring every room gets it right.
Paid-for, not pressured
You pay for a surveyor's time and keep the report. Go ahead with LINX within 90 days and the fee comes off your installation.
One record for your home
Everything you've told us in the quote builder or EPC planner goes to the surveyor, so you're not asked twice.
Not sure where to start? The free EPC Check & Upgrade Planner ranks every upgrade for your home.
Check my homeDiagnostics
Find out what's really going on
Thermal imaging, air leakage, cavity checks and condensation risk — the evidence behind the right insulation choice.
Thermal imaging survey
£200–£450
A thermal camera inspection, inside and out, with an annotated report.
Credited against your installation if you go ahead
Air-tightness (blower door) test
£250–£400
A blower door test that measures air leakage and finds draughts with a smoke pencil.
Credited against your installation if you go ahead
Cavity wall borescope survey
£95–£195
A camera check that shows whether your cavity walls are empty, filled or failed.
Credited against your installation if you go ahead
Spray foam suitability assessment
£250–£450
An independent look at roof structure, ventilation, moisture and your lender's position on spray foam.
Credited against your installation if you go ahead
Condensation risk analysis / U-value calc
£75–£150 each
U-value and condensation risk calculations for each wall, roof or floor build-up — needed for internal and external wall insulation.
Credited against your installation if you go ahead
EPCs and retrofit
Certificates, assessments and whole-house plans
From a lodged EPC to a PAS 2035 retrofit assessment and a costed, medium-term improvement plan.
Domestic EPC
£70–£150
An accredited assessor visits and lodges your Energy Performance Certificate on the government register.
Retrofit assessment (PAS 2035)
£350–£650
A PAS 2035 retrofit assessment for funded schemes and whole-house retrofit.
Credited against your installation if you go ahead
Whole-house retrofit plan
£650–£1,500
Assessment, energy model, medium-term improvement plan, costed options and EPC before and after.
Credited against your installation if you go ahead
SAP calculation (new build or extension)
£150–£350 per flat
Design-stage SAP, as-built SAP and the EPC for new dwellings and extensions.
Commercial and bespoke
Blocks, portfolios and commercial buildings
Scoped after a short call and priced to the building — request a quote and we'll come back with a fixed fee.
SBEM / commercial EPC
From £400
Non-domestic energy modelling and commercial EPCs.
Block of flats energy and fabric survey
From £1,500 per block
Whole-block survey, sample EPCs and an options report for freeholders and leaseholders.
Credited against your installation if you go ahead
Landlord portfolio EPC C plan
From £95 per property
A desktop review of every EPC in your portfolio with a costed route to C for each property.
How it works
Book in a few minutes
Pick a survey, tell us about your home, choose a date — instant confirmation and reminders.
Step 1
Pick your survey
Choose the survey that fits — or start with a heat loss survey if you're planning a heat pump.
Step 2
Tell us the size
Property type and size set the fee, within the published range.
Step 3
Choose a date
Pick a two-hour arrival window from the live calendar.
Step 4
Confirm
Your slot is confirmed straight away. Pay on the day or by invoice — no payment taken now.
Step 5
Surveyor visits
Measurements and photos of every room, with reminders the day before and on the day.
Step 6
Report and proposal
Your written report, and a proposal if you'd like one.
Prices
Every survey, every price
Published ranges, so you know where you stand before you book.
| Survey | Price |
|---|---|
| Heat loss survey: flat or small houseCredited if you go ahead | £250–£350 |
| Heat loss survey: 3–4 bed houseCredited if you go ahead | £325–£450 |
| Heat loss survey: large or detached 5+ bedCredited if you go ahead | £450–£650 |
| Heat loss survey + thermal imagingCredited if you go ahead | £450–£750 |
| Heat loss survey: commercial buildingCredited if you go ahead | From £750 |
| Thermal imaging surveyCredited if you go ahead | £200–£450 |
| Air-tightness (blower door) testCredited if you go ahead | £250–£400 |
| Cavity wall borescope surveyCredited if you go ahead | £95–£195 |
| Spray foam suitability assessmentCredited if you go ahead | £250–£450 |
| Condensation risk analysis / U-value calcCredited if you go ahead | £75–£150 each |
| Domestic EPC | £70–£150 |
| Retrofit assessment (PAS 2035)Credited if you go ahead | £350–£650 |
| Whole-house retrofit planCredited if you go ahead | £650–£1,500 |
| SAP calculation (new build or extension) | £150–£350 per flat |
| SBEM / commercial EPC | From £400 |
| Block of flats energy and fabric surveyCredited if you go ahead | From £1,500 per block |
| Landlord portfolio EPC C plan | From £95 per property |
Indicative ranges for London and the South East, supplied and installed, including VAT. Updated 11 October 2026. A survey confirms your final price.
Questions
Surveys, answered
Why do you charge for surveys?
A proper survey takes a qualified surveyor's time and gives you a written report you keep. If you go ahead with the work through LINX within 90 days, the fee is credited against your installation.
Which survey do I need?
Planning a heat pump or new radiators: a heat loss survey. Finding draughts or missing insulation: thermal imaging or an air-tightness test. Selling or letting: a domestic EPC. Funded or whole-house retrofit: a PAS 2035 retrofit assessment. Not sure? Try the free EPC Check & Upgrade Planner first.
How do I pay?
There's nothing to pay online. Your slot is confirmed straight away and you pay securely on the day or by invoice.
How is the fee worked out?
Every survey has a published price range. Your fee sits inside it, set by the size and type of your home, and you see it before you confirm.
Can I change my booking?
Yes — call us on 020 8914 7824 and we'll move it. You'll also get reminders the day before and on the day.
Which areas do you cover?
London and the South East. If you're just outside, ask — we'll tell you straight away if we can help.
Begin your project
Ready to book?
Choose a survey and a two-hour arrival window from the live calendar.