Two-storey extensions for end-of-terrace houses in the West Midlands

West Midlands at a glance

Nation: England
Price region: West Midlands
Postcode areas: B, CV, DY, WS, WV
Towns covered: 33 listed below, plus surrounding villages
Approval route: Planning permission is needed: in England, permitted development only allows single-storey extensions to the side.
Site visits: Free, no obligation

What a two-storey extension for an end-of-terrace house involves

A two-storey extension for an end-of-terrace house is a two-floor addition to the open side or the rear of the last house in a row. The side plot is often the best opportunity, because it adds width without taking rear garden. The design has to work with the terrace's roofline and the street, and any corner plot facing a road needs extra care.

The main places we list in the West Midlands are Birmingham (B1), Coventry (CV1), Wolverhampton (WV1), Dudley (DY1), Walsall (WS1) and Solihull (B91). We cover the villages in between too.

Guide price in the West Midlands

Using our West Midlands rates, a two-storey extension for an end-of-terrace house with a 3 m × 7 m footprint on two floors (42 m² of new floor space) comes to about £86,000–£115,500, including VAT. Bigger or more glazed designs cost more per m². Keep a contingency of around 10% for things nobody can see until the ground is opened up.

Spec	Per m²	Typical project
Essential	£1,890–£2,530 per m²	£79,000–£106,500
Standard	£2,050–£2,750 per m²	£86,000–£115,500
Premium	£2,460–£3,300 per m²	£103,500–£138,500

Rules in England

In England, a two-storey side extension on an end-of-terrace house always needs planning permission, costing £548 (or £575 for applications made from 8 December 2026). A two-storey rear extension can be permitted development within 3 m of the original rear wall and 7 m from the rear boundary. On a corner plot, nothing can go beyond a side wall that fronts a highway under permitted development.

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.

The Party Wall etc. Act 1996 applies, so notices may be needed for work on or near a shared wall or boundary.

Getting the design right

Continuing the terrace roof

A side extension on an end-of-terrace house usually continues the roofline of the row, so the pitch, eaves height and tiles must match. A small step down in the ridge and a set-back at the front often help the extension read as an addition rather than an extra house.

Corner plots

Many end-of-terrace houses sit on corners, where the side wall faces a road. In England nothing can be built beyond a side wall that fronts a highway under permitted development, and councils guard open corners, so we keep a gap to the pavement and design the side wall as a second front.

How we work in the West Midlands

Start at your house
We come to your home in the West Midlands, measure up, check the ground floor walls and roof structure, and note anything near the boundaries.
Drawings and permission
Our designers produce plans and elevations, then we take care of planning or permitted development checks with the council covering West Midlands.
Price it properly
Once the engineer's calculations are in, we fix the build price in writing, with a clear list of what's included.
Build and hand over
We manage the build from groundworks to decoration-ready finish and hand over with the completion paperwork.

Towns we cover in the West Midlands

Two-storey extensions for end-of-terrace houses in the West Midlands: questions

How much does a two-storey extension for an end-of-terrace house cost in the West Midlands?

In the West Midlands our guide is £2,050–£2,750 per m² including VAT, so about £86,000–£115,500 for a 3 m × 7 m footprint on two floors (42 m² of new floor space). Essential and Premium specs move that by roughly 8% down or 20% up.

Will my end-of-terrace extension look like a new house on the end?

It should not, if it is designed well. A slightly lower ridge, a set-back from the front wall and a different front door position help it read as an extension. Councils often ask for this to avoid an extension that looks like an extra terraced house.

Can I build a two-storey side extension on a corner plot?

Often, but it needs planning permission and careful design. Councils protect the openness of corners and the view along the road, so they usually expect a gap to the pavement, a set-back from the front and a side wall with windows rather than a blank wall. We check local guidance and nearby examples first.

Are old terrace foundations strong enough to extend next to?

Usually, but they need checking. Older terraces often have shallow brick footings, and a new two-storey extension sits on deeper, modern foundations alongside them. The structural engineer designs the junction so the two can move slightly without cracking, and we dig trial holes to see what is there before the design is fixed.

Will I need planning permission in the West Midlands?

West Midlands is in England. Planning permission is needed: in England, permitted development only allows single-storey extensions to the side.

Neighbouring areas

All extension services in the West Midlands · About two-storey extensions for end-of-terrace houses