Double-storey extensions in Bromsgrove

Before your two-storey extension in Bromsgrove

Expect to apply to Bromsgrove District Council for planning permission for a two-storey extension in Bromsgrove; 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.
The householder planning fee in England is £548 from April 2026, paid to Bromsgrove District Council when you apply.
Under permitted development, a rear extension of more than one storey can project no more than 3 metres and must be at least 7 metres from the rear boundary.

Postcode district: B61
Planning and building control: Bromsgrove District Council
From our West Bromwich base: 13 miles

Options to consider in Bromsgrove

Two-storey rear extension

Adds depth to both floors across the back of the house: a kitchen-diner below and a larger bedroom or new bathroom above. Permitted development only covers projections up to 3 metres and at least 7 metres from the rear boundary, so many rear builds still need planning. Overlooking and loss of light to neighbours are the usual tests.

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.

How much should you budget in Bromsgrove?

Expect to budget between £52,000 and £135,000 depending on size and specification in Bromsgrove. 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 Bromsgrove address.

Questions about double-storey extensions in Bromsgrove

How much does a double-storey extension cost?

In the West Midlands, most double-storey extensions cost between £52,000 and £135,000, including VAT where it applies. A typical side extension on a three-bed semi, around 32 m² across both floors, usually costs £68,000–£88,000 built to a plastered finish. Kitchen units, a bathroom suite, flooring and decorating are priced separately, so you can choose them to suit your budget.

Do you cover Bromsgrove?

Yes. Bromsgrove (B61) is about 13 miles from our West Bromwich base and inside the area we cover. Call 0800 088 6248 or send the form on this page to book a free survey.

How long does a double-storey extension take?

Plan on 14–22 weeks on site, depending on size and roof complexity. Before that, allow time for drawings, a planning decision (councils aim to decide householder applications within 8 weeks), Building Regulations drawings and party wall notices. It's worth starting the design well ahead of when you need the space, because the approvals stage can take as long as the build.

Does Bromsgrove District Council need to approve my two-storey extension?

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

Double-storey extensions near Bromsgrove

More services in Bromsgrove

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