Double-storey extensions in Binley

What should you know before starting in Binley?

Most two-storey extensions in Binley need a planning application to Coventry City Council. A two-storey rear extension can sometimes be permitted development, but only if it is no more than 3 m deep and at least 7 m from the rear boundary, among other conditions. Building Regulations approval is needed either way.

Councils often expect a side extension's first floor to be set back from the front wall, with its roof below the main ridge.
New first-floor bedrooms normally need an escape window with at least 0.33 m² of clear openable area.
The householder planning fee in England is £548 from April 2026, paid to Coventry City Council when you apply.

Postcode district: CV3
Planning and building control: Coventry City Council
From our West Bromwich base: 23 miles

Options to consider in Binley

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.

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.

What does your two-storey extension cost in Binley?

For a home in Binley, 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. A free survey turns this guide into a fixed, itemised price.

Before you book in Binley

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.

Which postcodes in Binley do you work in?

We cover CV3 and the streets around them. If you're on the edge of Binley, neighbouring Wyken and Walsgrave 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 Binley?

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.

Nearby places we cover

More services in Binley

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