Double-storey extensions in Polesworth

Planning your two-storey extension in Polesworth

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

The householder planning fee in England is £548 from April 2026, paid to North Warwickshire Borough 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.
An upstairs en-suite is simplest when the new bathroom sits close to the existing soil stack.

Postcode district: B78
Planning and building control: North Warwickshire Borough Council
From our West Bromwich base: 18 miles

Which options suit homes in Polesworth?

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.

Building over an existing extension

Adds a first floor on top of an existing single-storey extension or attached garage. It can cost less because the footprint already exists, but a structural engineer must check the existing foundations and walls first, and they sometimes need strengthening. The old flat roof comes off and the new floor is tied into the main house.

What does your two-storey extension cost in Polesworth?

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

Double-storey extensions in Polesworth: common questions

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 Polesworth do you work in?

We cover B78 and the streets around them. If you're on the edge of Polesworth, neighbouring Fazeley and Tamworth 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.

Will I need permission from the council in Polesworth?

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

Double-storey extensions near Polesworth

Other home improvements in Polesworth

Let's talk about the space you need; a written, itemised quote for your Polesworth home costs nothing and commits you to nothing.