Two-storey wraparound extensions in Market Harborough

Quick reference for homeowners in Market Harborough.

Postcode districts: LE16
County / area: Northamptonshire, England
Price region: East Midlands
Guide price: £118,000–£162,000 (£2,110–£2,890 per m²)
Approval route: Planning permission is needed: the side part takes it outside permitted development in England.
Nearest towns: Desborough (4.9 miles), Corby (9.8 miles), Kettering (9.9 miles)
Distance to Northampton: about 15.8 miles
First visit: Free, no obligation

About a two-storey wraparound extension

A two-storey wraparound extension is an L-shaped addition that extends both the side and the rear of your house, on two floors. It gives one of the largest gains in floor space of any extension, typically a big open-plan kitchen and living area below and two or more bedrooms or bathrooms above. In England it needs planning permission, because the side part is more than one storey.

We cover postcode district LE16 in and around Market Harborough, along with neighbouring Desborough, Corby and Kettering.

What it costs in Market Harborough

Guide prices for two-storey wraparound extensions in the East Midlands are around £2,110–£2,890 per m² of new floor space, including VAT. For a typical project with an L-shaped footprint of about 28 m² wrapping the side and rear, on two floors (56 m² of new floor space), that's roughly £118,000–£162,000. Keep a contingency of around 10% for things nobody can see until the ground is opened up.

Spec	Per m²	An L-shaped footprint of about 28 m² wrapping the side and rear, on two floors (56 m² of new floor space)
Essential	£1,940–£2,660 per m²	£108,500–£149,000
Standard	£2,110–£2,890 per m²	£118,000–£162,000
Premium	£2,530–£3,470 per m²	£141,500–£194,500

Planning and building regulations in Market Harborough

In England, a two-storey wraparound extension needs householder planning permission, because any extension beyond a side wall must be single storey to be permitted development. The application costs £548 (or £575 for applications made from 8 December 2026). Councils weigh the side part against the street scene and the rear part against neighbours' light and outlook, and should decide within 8 weeks of validation.

Approval in England: Householder planning application: £548 (or £575 for applications made from 8 December 2026). Lawful development certificate: £274 (about £288 for applications from 8 December 2026). Councils should decide householder applications within 8 weeks of validation.

Building regulations: Building regulations approval (full plans recommended) from the council or a registered building control approver, with a completion certificate at the end.

Design points for Market Harborough homes

Two roofs that meet

A wraparound needs the side roof and rear roof to join cleanly, often with a valley or hip where they meet. Getting pitches and ridge heights right keeps rainwater moving and avoids a bulky mass at the back corner, which neighbours and planners notice.

The corner post

At the outside corner of the L, there is no existing wall to carry the floor above. Opening the ground floor fully usually means a steel frame or a corner post, and the engineer's design sets how slim it can be. We decide early whether you want a clear corner or a visible post.

How we'd run your project

Understand the brief
At your home in Market Harborough we agree what you need: bedroom count, bathroom, kitchen space, and how much garden you want to keep.
Choose the approval route
Some designs fit permitted development, most need a householder application. We decide which applies in England before drawing in detail.
Structure and building control
A structural engineer sizes the foundations and steels, and we get building regulations approval before work starts.
Build
Foundations, walls, floor, roof, windows, then first and second fix. We break through into the house as late as we can.

Questions about two-storey wraparound extensions in Market Harborough

Which postcodes do you cover around Market Harborough?

We cover Market Harborough (LE16) and nearby places including Desborough, Corby and Kettering, plus the rest of Northamptonshire. The first site visit is free.

Who handles building regulations for a project in Market Harborough?

We handle it as part of the project. What's needed in England: building regulations approval (full plans recommended) from the council or a registered building control approver, with a completion certificate at the end. We prepare the drawings and the engineer's calculations, book the inspections and pass you the completion paperwork at the end.

Do I need planning permission for a two-storey wraparound extension in Market Harborough?

Market Harborough is in England, so England planning rules apply. Planning permission is needed: the side part takes it outside permitted development in England. If in doubt, a lawful development certificate or a planning application gives you certainty before you build.

How much floor space does a wraparound extension add?

It depends on the width of the side plot and the depth at the rear. Our guide prices are based on a typical wraparound with an L-shaped footprint of about 28 m² wrapping the side and rear, on two floors (56 m² of new floor space). Yours may be larger or smaller, and the measured survey shows what your plot can take.

Can I stay at home during a wraparound extension?

Many people do, but a wraparound affects two sides of the house and usually the kitchen, so there will be weeks without a full kitchen. We plan a temporary kitchen, keep a route through the house and seal off the work area. For some families, moving out while the rear wall is opened up is easier.

Nearby

Close to Market Harborough? We work across the area, including:

Other extensions in Market Harborough

All two-storey extension services in Market Harborough · Two-storey wraparound extensions across Northamptonshire

Send us your postcode and a few details. We'll get back to you to arrange a visit and talk through your options.