Double-storey extensions in Brownhills

Before your two-storey extension in Brownhills

Expect to apply to Walsall Council for planning permission for a two-storey extension in Brownhills; side extensions over one storey always need it. We prepare the drawings, and the structural work also needs Building Regulations approval.

Party wall notices take one or two months to run, so they're best served as soon as planning is granted.
An upstairs en-suite is simplest when the new bathroom sits close to the existing soil stack.
New first-floor bedrooms normally need an escape window with at least 0.33 m² of clear openable area.

Postcode district: WS8
Planning and building control: Walsall Council
From our West Bromwich base: 8 miles

Which option fits your home?

Combined side and rear

An L-shaped two-storey build wrapping the side and back of the house gives the biggest gain, sometimes two extra bedrooms. It's a substantial project with more steel and a complex roof junction, and it will need a householder planning application. Expect a longer programme and a careful plan for keeping the house secure while the roofs are joined.

Two-storey side extension

Built over the side of the house, often where a driveway or old garage sits. It can create a garage, utility or study downstairs with a double bedroom above. Councils often expect the upper floor to be set back from the front and the roof to sit lower than the main ridge, so the design needs care to win approval.

What does your two-storey extension cost in Brownhills?

Expect to budget between £52,000 and £135,000 depending on size and specification in Brownhills. A two-storey side extension on a three-bed semi, about 32 m² over two floors: typically £68,000–£88,000.

Guide prices for double-storey extensions
Option	Guide price	Good to know
Compact two-storey rear (20–28 m² total)	£52,000 – £72,000	Bigger kitchen below, bedroom or bathroom above
Two-storey side or rear (30–40 m² total)	£68,000 – £98,000	The usual size on a three-bed semi
Large or combined side and rear (45 m²+)	£95,000 – £135,000	More steel, a complex roof and a longer programme

Guide ranges include VAT where it applies. Your fixed price for the agreed specification follows a free survey at your Brownhills address.

Your questions answered

Can we stay in the house while you build?

Most families do. The early stages are outside, and the existing house stays closed off until the shell is weathertight. The harder weeks are when openings are cut through on both floors, which brings dust and noise into bedrooms and the kitchen. We sheet off openings, lock up securely every night and agree in advance which rooms you'll lose and when.

Which postcodes in Brownhills do you work in?

We cover WS8 and the streets around them. If you're on the edge of Brownhills, neighbouring Walsall Wood and Pelsall are covered too.

What will the council look at when deciding planning?

Councils judge two-storey extensions mainly on their effect on neighbours and the street. They look at loss of light and outlook next door, overlooking from upstairs windows, and whether the extension sits comfortably with the house, often expecting side extensions to be set back and lower than the main roof. Many councils publish householder design guides, and following yours closely improves the chance of approval.

Does Walsall Council need to approve my two-storey extension?

Usually both. Most two-storey extensions need a planning application to Walsall Council, and the structural work needs Building Regulations approval from its building control team or a registered building control approver.

Nearby places we cover

Other home improvements in Brownhills

Want a guide figure first? Use our quote tool for your Brownhills extension, then book a survey for a fixed price for the agreed specification.