Ventilation for new builds, extensions and lofts in Bedfordshire

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.

Every job in Bedfordshire gets a written quote before it starts and a commissioning record when it finishes. We cover Kempston, Biggleswade, Flitwick, Luton and Bedford and the villages around them.

New builds & extensions in Bedfordshire at a glance

Area: Bedfordshire
Towns listed: 10, largest Luton
Postcode districts: SG16, SG18, SG19, LU1, LU2 and MK40
Price region: East of England
Survey: Free survey (UK mainland)

What ventilation for new builds, extensions and lofts involves

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. Fitting ducts at first fix is far cheaper than retrofitting, so it pays to involve us before the ceilings go up.

MEV or dMEV

Continuous extract systems where MVHR is not specified.

Extensions and lofts

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

Commissioning only

Testing and paperwork for systems installed by others.

Guide prices in Bedfordshire

Ventilation for new builds, extensions and lofts guide prices in Bedfordshire
Work	Guide price
MVHR in a new build or full renovation (fitted at first fix), 3 to 4 bedrooms (per home)	£5,200–£8,350 inc VAT
Continuous-running extract fan (dMEV) with humidity boost, flow tested (per fan)	£360–£625 inc VAT
Airflow testing and commissioning sheet for extract fans (up to 6 fans) (per home)	£150–£310 inc VAT
MVHR or MEV commissioning test, every terminal measured and recorded (per system)	£255–£415 inc VAT

Guide prices using East of England rates. Prices include VAT at 20%. A guide price is not a quote: we confirm a fixed price in writing first.

Common reasons people call

A self-build with an airtightness target
Ceilings are about to be boarded
Building control has asked for a ventilation strategy or commissioning sheet

Rules in England

English building work follows Approved Document F (2021 edition) for ventilation rates, installation and commissioning. For homes, it sets minimum extract rates such as 15 litres a second for a bathroom and 30 or 60 for a kitchen, and expects mechanical systems to be airflow-tested.

How the job runs

Drawings
Design
First fix
Second fix
Commission

Towns we cover in Bedfordshire

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

Which towns in Bedfordshire do you cover?

All of Bedfordshire, including Kempston, Biggleswade, Flitwick, Luton and Bedford. 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 Bedfordshire?

Our guide prices are adjusted by region. In Bedfordshire we use East of England rates, so MVHR in a new build or full renovation (fitted at first fix), 3 to 4 bedrooms is typically £5,200 to £8,350 inc VAT per home.

Is the survey free in Bedfordshire?

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.