Ventilation for new builds, extensions and lofts in Warwickshire

New homes, extensions and loft conversions need ventilation that meets the building regulations and is tested before sign-off. We design the system, install it at the right stage of the build, measure the airflows and provide the commissioning information building control asks for.

If you are anywhere in Warwickshire, send the postcode and a few photos and we will tell you what we would recommend. Towns we cover include Warwick, Bedworth, Stratford-upon-Avon, Kenilworth and Hartshill.

New builds & extensions in Warwickshire at a glance

Area: Warwickshire
Towns listed: 9, largest Nuneaton
Postcode districts: CV8, CV9, CV10, CV9, CV10 and CV10
Price region: West Midlands
Survey: Free survey (UK mainland)

What the work involves

For new dwellings in England, Approved Document F sets whole-home ventilation rates and requires mechanical systems to be commissioned and the results given to building control. Extensions and loft conversions have their own triggers: a new wet room needs extract, a new habitable room needs background ventilation or a connection to the ducted system, and energy-efficiency work can mean the existing home needs more ventilation too. We work for self-builders, small developers, builders and architects.

Extensions and lofts

Extract for new bathrooms and kitchens, background ventilation for new rooms.

Commissioning only

Testing and paperwork for systems installed by others.

MVHR for new builds

Design, first fix, second fix and commissioning for whole-home heat recovery.

Guide prices in Warwickshire

Ventilation for new builds, extensions and lofts guide prices in Warwickshire
Work	Guide price
MVHR in a new build or full renovation (fitted at first fix), 3 to 4 bedrooms (per home)	£4,950–£7,950 inc VAT
Continuous-running extract fan (dMEV) with humidity boost, flow tested (per fan)	£345–£595 inc VAT
Airflow testing and commissioning sheet for extract fans (up to 6 fans) (per home)	£145–£295 inc VAT
MVHR or MEV commissioning test, every terminal measured and recorded (per system)	£245–£395 inc VAT

These ranges use our West Midlands rates. Prices include VAT at 20%. You get a fixed written price before any work is booked.

When to get it looked at

You are adding a bathroom or kitchen in an extension or loft
You are insulating and re-windowing an existing home
A self-build with an airtightness target

Rules in England

English building work follows Approved Document F (2021 edition) for ventilation rates, installation and commissioning. It sets extract rates for kitchens, bathrooms and utilities and asks for mechanical ventilation to be commissioned and recorded.

How the job runs

Drawings
Design
First fix
Second fix
Commission

Towns we cover in Warwickshire

Questions about ventilation for new builds, extensions and lofts in Warwickshire

Which towns in Warwickshire do you cover?

All of Warwickshire, including Warwick, Bedworth, Stratford-upon-Avon, Kenilworth and Hartshill. If your town is not listed, send the postcode and we will confirm.

Do loft conversions need ventilation?

Yes. New bedrooms need background ventilation, and a new en-suite or bathroom needs extract to outside.

Does an extension need extractor fans?

A new kitchen, bathroom, utility room or WC in an extension needs mechanical extract to meet Approved Document F in England, and new habitable rooms need background ventilation or a connection to a ducted system.

Are prices different in Warwickshire?

Our guide prices are adjusted by region. In Warwickshire we use West Midlands rates, so MVHR in a new build or full renovation (fitted at first fix), 3 to 4 bedrooms is typically £4,950 to £7,950 inc VAT per home.

Is the survey free in Warwickshire?

For new installations on the UK mainland, yes. The survey is free and the quote that follows is fixed and in writing. Servicing, testing and repair visits are charged, and we confirm the cost before booking.