- Area
- Gloucestershire
- Postcode district
- BS35
- Nation
- England
- Guide price
- Priced after survey
- Survey
- Free for installation enquiries
Before you book: heat loss surveys in Thornbury
A heat pump suits most Thornbury homes, but the details decide how efficiently it runs. Our survey looks at insulation, radiators and hot water use room by room.
For Thornbury homes with extensions or loft conversions, each part of the house is assessed on its own construction. Homeowners in Thornbury thinking about insulation work can use the survey to see how it would change their heat pump size.
Every heat pump we quote starts with a room-by-room heat loss survey, free with installation enquiries and also available as a stand-alone report.
- Self-builders and architects who need emitter and system sizes early
- Homeowners planning insulation or building work who want to know the effect on heat demand
- Anyone getting a heat pump quote, as the first step
What's included
- Room-by-room heat loss calculation using the MCS method
- Recommended heat pump size and design flow temperature
- Written results in your quote, or a stand-alone report if you order one
- Outdoor unit siting options and noise check
- Hot water cylinder sizing for your household
A surveyor visits your Thornbury home to measure each room, window and wall before any heat pump is sized.
Grants and rules for heat pumps in England
Homes in Thornbury can use the Boiler Upgrade Scheme, which takes £7,500 off the cost of an air source heat pump when it replaces fossil-fuel or electric heating. Replacing oil or LPG heating qualifies for £9,000 for installations from 21 July 2026 to 31 March 2027, and air-to-air systems for £2,500. The MCS-certified installer named in your quote applies for the grant and deducts it from the price.
Installing heat pumps is zero-rated for VAT across the UK until 31 March 2027. Since 29 May 2025, permitted development in England allows up to two air source heat pumps on a house, each up to 1.5 m³, with no blanket 1 m boundary rule — the installation must still meet the MCS planning standards, including the noise check. Listed buildings, flats and some conservation-area positions need extra consent, which we check at survey.
What to budget for heat loss surveys in Thornbury
The ranges below are typical installed prices for homes in Gloucestershire, including VAT. A survey sets the exact figure, because two similar-looking houses in Thornbury can need quite different radiators and pipework.
| Survey | Guide price |
|---|---|
| Home survey and heat loss calculation with an installation quote | Free |
| Stand-alone heat loss survey and report | £150–£400 |
Inc VAT. A stand-alone report is for homeowners who want the design without an installation quote.
Winter daylight and heating in Thornbury
Thornbury has about 7 hours 48 minutes of daylight at midwinter and 16 hours 40 minutes at midsummer. That swing matters if you pair a heat pump with solar panels: summer generation can cover much of the hot water, winter generation far less.
The steps for heat loss surveys in Thornbury
- Start online with a guide price or call us.
- A home survey in Thornbury gives us the room-by-room heat loss.
- Your written quote sets out the design, the price and the grant position where you live.
- Installation is booked for dates that suit you; most homes take 2–4 days on site.
- After commissioning you get a handover of the controls and settings, plus the certificates.
Heat loss surveys in Thornbury: questions
Can you service a heat pump in Thornbury that someone else installed?
Yes. We arrange servicing and repairs for most air source heat pumps in Thornbury, whoever fitted them. Tell us the make and model when you book.
Do you cover Yate as well as Thornbury?
Yes. We arrange surveys and installation in Yate, which is about 6 miles south-east of Thornbury, and across Gloucestershire.
How long does installation take in Thornbury?
Most installations take 2–4 days on site. Jobs with several radiator changes or new pipework take longer, and your quote for a Thornbury home states the expected time.
Is the heat loss survey free?
Yes, for installation enquiries the home survey and heat loss calculation are free, and the results form the basis of your written quote. If you only want the calculation and report, for example for building plans or comparing quotes, a stand-alone heat loss survey has a guide price of £150–£400, including VAT. We confirm which applies when you book.
Why can't you size the heat pump from my boiler?
Boilers are often much larger than a home's real heat loss, because they are sized for fast hot water and quick warm-ups. Matching a heat pump to the boiler's output usually means an oversized unit that costs more and switches on and off too often. A room-by-room calculation finds the actual heat demand, which is what the heat pump needs to meet.