Room-by-room heat loss to MCS standards for a flat or small house, with heat pump and radiator sizing.
Credited against your installation if you go ahead
Heat loss survey
Heat loss survey: 3–4 bed house
Room-by-room heat loss to MCS standards for a 3–4 bedroom house, with heat pump and radiator sizing.
Book online
£325–£450
Your fee is set by the size and type of your home, shown before you confirm.
Credited against your installation if you go ahead within 90 days.
Choose a date Or call 020 8914 7824Other sizes
- flat or small house£250–£350
- 3–4 bed house£325–£450
- large or detached 5+ bed£450–£650
What you get
What's included
- A surveyor visits and measures every room, wall, window, floor and roof
- Room-by-room heat loss calculation to MCS standards (BS EN 12831)
- Heat pump sizing, plus radiator or underfloor heating sizing for each room
- A written report emailed to you as a PDF
Who it's for
- Homeowners planning an air or ground source heat pump
- Anyone replacing radiators or adding underfloor heating
- Homes that feel cold in some rooms and not others
The visit
Your surveyor arrives within your chosen two-hour window and needs access to every room, the loft and the heating system.
What happens next
From booking to report
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
Heat loss survey prices by size
Choose your size when you book — the fee updates as you go.
| Survey | Price |
|---|---|
| Heat loss survey: flat or small house | £250–£350 |
| Heat loss survey: 3–4 bed house | £325–£450 |
| Heat loss survey: large or detached 5+ bed | £450–£650 |
| Heat loss survey + thermal imaging | £450–£750 |
Indicative ranges for London and the South East, supplied and installed, including VAT. Updated 11 October 2026. A survey confirms your final price.
Questions
About the heat loss survey: 3–4 bed house
Do I need a heat loss survey before a heat pump?
Yes. An MCS-certified heat pump installation — which the £7,500 Boiler Upgrade Scheme grant requires — has to be designed from a room-by-room heat loss calculation. This survey provides it, so the heat pump and radiators are sized properly.
Is the survey fee refunded?
If you go ahead with the work through LINX within 90 days, the survey fee is credited against your installation. If you don't, you still keep the report.
What do I need to do before the visit?
Make sure the surveyor can get into every room, the loft hatch and the boiler or heating controls. Recent energy bills are useful if you have them.
Related
Other surveys you might need
Room-by-room heat loss to MCS standards for a large or detached home, with heat pump and radiator sizing.
Credited against your installation if you go ahead
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
Begin your project
Not sure which survey?
The free EPC Check & Upgrade Planner ranks every upgrade for your home and tells you which survey confirms the figures.