Double-storey extensions in Rubery

Double-storey extensions in Rubery: approvals and local details

Expect to apply to Bromsgrove District Council for planning permission for a two-storey extension in Rubery; 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.
Scaffolding is usually up for most of the build, so think about access along the side of the house early.
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: B45
Planning and building control: Bromsgrove District Council
From our West Bromwich base: 8 miles

Options to consider in Rubery

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.

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.

How much should you budget in Rubery?

Expect to budget between £52,000 and £135,000 depending on size and specification in Rubery. 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. Access, parking and the state of what's there now can move the price — the survey settles it.

Double-storey extensions in Rubery: common questions

What paperwork will I have at the end?

You'll get the building control completion certificate, the electrical installation certificate, your planning decision notice and the manufacturers' guarantee documents for windows, doors and roof products, with their terms set out in your quote. Keep these together, as a buyer's solicitor will ask for them when you sell. Ask us for current insurance details with your quote.

Do you cover Rubery?

Yes. Rubery (B45) is about 8 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 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.

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.

Also covering nearby

Other home improvements in Rubery

Ask for a free survey in Rubery and we'll tell you what's likely to get planning before you pay for drawings.