Loft conversions · March

Loft conversions in March

Planning loft conversions in March? We design and build them for houses across Cambridgeshire, and we fix the price for the agreed specification in writing before any building work starts.

Covering March

Our coverage around March (PE15) also includes Wisbech (8 miles to the north) and Peterborough.

Homes in the East of England

The East of England has a large stock of post-war and modern estate housing alongside period homes in market towns, which makes garage conversions, single-storey extensions and loft conversions popular.

What goes into a loft conversion?

We start with the head height. You need roughly 2.2 m or more from the top of the ceiling joists to the underside of the ridge for a conversion to work without raising the roof. From there we design the staircase position, the type of conversion and the en-suite, and manage the whole build including fire safety and building control.

  • Planning or lawful development certificate
  • New floor joists, steels and staircase
  • En-suite, electrics, heating and fire safety upgrades

What will a loft conversion cost?

Use these ranges to budget for loft conversions; the survey turns them into a fixed price for the agreed specification.

Loft conversionsGuide price incl. VAT
Rooflight conversion£30,000 to £45,000
Dormer conversion£50,000 to £90,000
Hip-to-gable with dormer£60,000 to £95,000
Mansard conversion£65,000 to £110,000

Planning and building rules in March

English projects need planning clearance from the local council, building regulations sign-off from building control, and party wall notices where the work is on or near a shared boundary. We prepare and manage all three.

In England many loft conversions are permitted development: the extra roof volume must stay within 40 m³ on a terraced house or 50 m³ on a semi or detached house, nothing can sit higher than the existing ridge, no dormer can face a road on the main elevation, and side windows must be obscure-glazed and non-opening below 1.7 m. Houses in conservation areas, National Parks and National Landscapes cannot use these roof-extension rights, so dormers there need planning permission (a rooflight-only conversion can still be permitted development), and flats always need permission.

What can affect a loft conversion?

  • Head height under the ridge decides whether a conversion is practical.
  • Fire safety rules can mean new fire doors on the floors below.

How does the project run?

  1. Tell us about the project. Call, use the guide price tool or send the form with a few photos and a postcode.
  2. Survey at your house. We look at the existing structure, services and access, and agree what the design needs to achieve.
  3. Price and paperwork. The design is priced line by line, and we submit the planning and building control applications.
  4. Construction and completion. One site lead co-ordinates every trade through to the building control certificate.

Questions about a loft conversion in March

Can we live at home during a loft conversion?

Yes. Most of the work is done from scaffolding until the staircase goes in near the end.

Do I need fire doors?

Often yes. Building regulations require a protected escape route from the new floor, which usually means fire doors on to the stairs and linked smoke alarms.

Do you work in March?

Yes. March is within our coverage for loft conversions, along with nearby Wisbech and Peterborough.

Loft conversions near March

Learn more about loft conversions, or see every project we cover in March.

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