Double-storey extensions in Atherstone

What should you know before starting in Atherstone?

Most two-storey extensions in Atherstone need a planning application to North Warwickshire Borough 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.
The householder planning fee in England is £548 from April 2026, paid to North Warwickshire Borough Council when you apply.
New first-floor bedrooms normally need an escape window with at least 0.33 m² of clear openable area.

Postcode district: CV9
Planning and building control: North Warwickshire Borough Council
From our West Bromwich base: 19 miles

Which option fits your home?

Mixed-height extension

A two-storey section at the side with a single-storey section running across the back. This keeps the first floor away from neighbours' windows while still giving a wide kitchen-diner below. It's a practical compromise where planners have concerns about a full-depth two-storey rear extension, and it often simplifies the roof.

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.

Guide prices for Atherstone

Prices in Atherstone match the rest of our area: £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 Atherstone

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 Atherstone do you work in?

We cover CV9 and the streets around them. If you're on the edge of Atherstone, neighbouring Polesworth and Nuneaton 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 Atherstone?

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.

Also covering nearby

Other home improvements in Atherstone

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