Double-storey extensions in Allesley

What should you know before starting in Allesley?

Expect to apply to Coventry City Council for planning permission for a two-storey extension in Allesley; 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.
An upstairs en-suite is simplest when the new bathroom sits close to the existing soil stack.
The householder planning fee in England is £548 from April 2026, paid to Coventry City Council when you apply.

Postcode district: CV5
Planning and building control: Coventry City Council
From our West Bromwich base: 19 miles

Choices to weigh up in Allesley

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.

What does your two-storey extension cost in Allesley?

Expect to budget between £52,000 and £135,000 depending on size and specification in Allesley. 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. Your fixed price for the agreed specification follows a free survey at your Allesley address.

Your questions answered

Can we stay in the house while you build?

Most families do. The early stages are outside, and the existing house stays closed off until the shell is weathertight. The harder weeks are when openings are cut through on both floors, which brings dust and noise into bedrooms and the kitchen. We sheet off openings, lock up securely every night and agree in advance which rooms you'll lose and when.

Which postcodes in Allesley do you work in?

We cover CV5 and the streets around them. If you're on the edge of Allesley, neighbouring Earlsdon and Tile Hill are covered too.

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.

Does Coventry City Council need to approve my two-storey extension?

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

Double-storey extensions near Allesley

Other work we do in Allesley

Want a guide figure first? Use our quote tool for your Allesley extension, then book a survey for a fixed price for the agreed specification.