Double-storey extensions in Edgbaston

Before your two-storey extension in Edgbaston

Planning permission from Birmingham City Council is the first hurdle for most double-storey extensions in Edgbaston. Householder applications have an eight-week target for a decision, and Building Regulations approval and the Party Wall Act may also apply.

Scaffolding is usually up for most of the build, so think about access along the side of the house early.
New first-floor bedrooms normally need an escape window with at least 0.33 m² of clear openable area.
Party wall notices take one or two months to run, so they're best served as soon as planning is granted.

Postcode district: B15
Planning and building control: Birmingham City Council
From our West Bromwich base: 5 miles

Which option fits your home?

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 Edgbaston?

Prices in Edgbaston match the rest of our area: £52,000–£135,000 depending on size and specification. A two-storey side extension on a three-bed semi, about 32 m² over two floors: usually £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.

Before you book in Edgbaston

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.

Do you cover Edgbaston?

Yes. Edgbaston (B15) is about 5 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.

Will I need permission from the council in Edgbaston?

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

Also covering nearby

Other work we do in Edgbaston

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