Double-storey extensions in Alcester

Before your two-storey extension in Alcester

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

A side extension of more than one storey always needs a householder planning application.
The householder planning fee in England is £548 from April 2026, paid to Stratford-on-Avon District Council when you apply.
An upstairs en-suite is simplest when the new bathroom sits close to the existing soil stack.

Postcode district: B49
Planning and building control: Stratford-on-Avon District Council
From our West Bromwich base: 22 miles

Options to consider in Alcester

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.

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.

How much should you budget in Alcester?

For a home in Alcester, our guide range is £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.

Double-storey extensions in Alcester: common questions

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.

Which postcodes in Alcester do you work in?

We cover B49 and the streets around them. If you're on the edge of Alcester, neighbouring Studley and Stratford-upon-Avon 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.

Who approves double-storey extensions in Alcester?

Usually both. Most two-storey extensions need a planning application to Stratford-on-Avon 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 Alcester

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