Ventilation for new builds, extensions and lofts in Derbyshire

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.

We carry out ventilation for new builds, extensions and lofts across Derbyshire, including Belper, Heanor, Derby, Chesterfield and Long Eaton. Prices use East Midlands rates. The survey is free for new installations on the UK mainland, and the quote that follows is fixed and in writing.

New builds & extensions in Derbyshire at a glance

Area: Derbyshire
Towns listed: 21, largest Derby
Postcode districts: DE1, DE22, S40, S41, DE72 and NG9
Price region: East Midlands
Survey: Free survey (UK mainland)

What ventilation for new builds, extensions and lofts 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.

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.

MEV or dMEV

Continuous extract systems where MVHR is not specified.

Guide prices in Derbyshire

Ventilation for new builds, extensions and lofts guide prices in Derbyshire
Work	Guide price
MVHR in a new build or full renovation (fitted at first fix), 3 to 4 bedrooms (per home)	£4,850–£7,800 inc VAT
Continuous-running extract fan (dMEV) with humidity boost, flow tested (per fan)	£340–£575 inc VAT
Airflow testing and commissioning sheet for extract fans (up to 6 fans) (per home)	£140–£290 inc VAT
MVHR or MEV commissioning test, every terminal measured and recorded (per system)	£240–£385 inc VAT

Guide prices using East Midlands 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

You are insulating and re-windowing an existing home
A self-build with an airtightness target
Ceilings are about to be boarded

Rules in England

In England, ventilation is covered by Part F of the Building Regulations and its guidance, Approved Document F (2021 edition). 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 Derbyshire

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

Are prices different in Derbyshire?

Our guide prices are adjusted by region. In Derbyshire we use East Midlands rates, so MVHR in a new build or full renovation (fitted at first fix), 3 to 4 bedrooms is typically £4,850 to £7,800 inc VAT per home.

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.

Is the survey free in Derbyshire?

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.

Which rules apply to ventilation in Derbyshire?

In England, ventilation in new and altered homes is covered by Approved Document F of the Building Regulations. Landlords also have duties under the Housing Health and Safety Rating System, and workplaces must be ventilated under the Workplace (Health, Safety and Welfare) Regulations 1992.