Double-storey extensions in Catshill

Before your two-storey extension in Catshill

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

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: 12 miles

Which options suit homes in Catshill?

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.

Mixed-height extension

A two-storey section at the side with a single-storey section running across the back. This keeps the first floor away from neighbours' windows while still giving a wide kitchen-diner below. It's a practical compromise where planners have concerns about a full-depth two-storey rear extension, and it often simplifies the roof.

What does your two-storey extension cost in Catshill?

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

Questions about double-storey extensions in Catshill

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.

Which postcodes in Catshill do you work in?

We cover B61 and the streets around them. If you're on the edge of Catshill, neighbouring Bromsgrove and Rubery are covered too.

Is a double-storey extension better value than a single-storey one?

Per square metre, usually yes. Foundations and roofs are the expensive parts of any extension, and on a two-storey build they serve twice the floor area. You'll pay more in total and planning is less certain, but if you need a bedroom as well as downstairs space, building both together normally costs less than two separate projects years apart.

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.

Nearby places we cover

Other home improvements in Catshill

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