Ventilation for new builds, extensions and lofts in Lothians

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.

The Lothians has every kind of building, from old terraces to new estates and business parks, and every job is designed around the building in front of us, not a standard kit.

New builds & extensions in the Lothians at a glance

Area: Lothians, Scotland
Towns listed: 13, largest Livingston
Postcode districts: EH40, EH42, EH52, EH53, EH15 and EH21
Price region: Scotland
Survey: Free survey (UK mainland)

How we do it

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 the Lothians

Ventilation for new builds, extensions and lofts guide prices in the Lothians
Work	Guide price
MVHR in a new build or full renovation (fitted at first fix), 3 to 4 bedrooms (per home)	£4,750–£7,650 inc VAT
Continuous-running extract fan (dMEV) with humidity boost, flow tested (per fan)	£330–£575 inc VAT
Airflow testing and commissioning sheet for extract fans (up to 6 fans) (per home)	£140–£285 inc VAT
MVHR or MEV commissioning test, every terminal measured and recorded (per system)	£235–£380 inc VAT

Scotland rates shown. Prices include VAT at 20%. The fixed price is confirmed in writing after we have seen the job.

Common reasons people call

Your SAP assessor has assumed a particular ventilation system
You are adding a bathroom or kitchen in an extension or loft
You are insulating and re-windowing an existing home

Rules in Scotland

In Scotland, ventilation is covered by the Building (Scotland) Regulations and section 3 of the Technical Handbooks, and most building work needs a building warrant first. Extract and whole-home rates are designed to the Scottish standards and measured at handover.

How the job runs

Drawings
Design
First fix
Second fix
Commission

Towns we cover in the Lothians

Questions about ventilation for new builds, extensions and lofts in the Lothians

Which rules apply to ventilation in the Lothians?

In Scotland, ventilation is covered by section 3 of the Building Standards Technical Handbooks. Private rented homes must meet the Repairing Standard, and workplaces must be ventilated under the Workplace (Health, Safety and Welfare) Regulations 1992.

Do loft conversions need ventilation?

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

When should MVHR be fitted in a new build?

MVHR ducts should go in at first fix, after the structure and before plasterboard. Planning it at design stage avoids clashes with joists and steels.

Which towns in the Lothians do you cover?

All of the Lothians, including Bathgate, Bonnyrigg, Penicuik, Broxburn and Mayfield. If your town is not listed, send the postcode and we will confirm.

Are prices different in the Lothians?

Our guide prices are adjusted by region. In the Lothians we use Scotland rates, so MVHR in a new build or full renovation (fitted at first fix), 3 to 4 bedrooms is typically £4,750 to £7,650 inc VAT per home.

Ventilation for new builds, extensions and lofts in the Lothians