Double-storey extensions in Worcestershire

Before your two-storey extension in Worcestershire

Expect to apply to the district or borough council for your town for planning permission for a two-storey extension in Worcestershire; 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.
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.
The householder planning fee in England is £548 from April 2026, paid to the district or borough council for your town when you apply.

Postcode district: All Worcestershire postcodes
Planning and building control: Your district council
From our West Bromwich base: About 14 miles to the centre

Which options suit homes in Worcestershire?

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 Worcestershire?

For a home in Worcestershire, 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.

Before you book in Worcestershire

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.

Do you cover the whole of Worcestershire?

Yes — we cover Worcestershire from our West Bromwich base, including Dudley, Sandwell and Wolverhampton. 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 the council need to approve my two-storey extension?

Usually both. Most two-storey extensions need a planning application to the district or borough council for your town, and the structural work needs Building Regulations approval from its building control team or a registered building control approver.

Double-storey extensions across Worcestershire

We cover every town and district below:

Also covering nearby

Other home improvements in Worcestershire

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