Double-storey extensions in Stratford-upon-Avon

Planning your two-storey extension in Stratford-upon-Avon

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

Councils often expect a side extension's first floor to be set back from the front wall, with its roof below the main ridge.
An upstairs en-suite is simplest when the new bathroom sits close to the existing soil stack.
Scaffolding is usually up for most of the build, so think about access along the side of the house early.

Postcode district: CV37
Planning and building control: Stratford-on-Avon District Council
From our West Bromwich base: 26 miles

Options to consider in Stratford-upon-Avon

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.

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.

Double-storey extensions prices in Stratford-upon-Avon

Guide prices start at £52,000 and run to £135,000 depending on size and specification. A two-storey side extension on a three-bed semi, about 32 m² over two floors: around £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 Stratford-upon-Avon

How much does a double-storey extension cost?

In the West Midlands, most double-storey extensions cost between £52,000 and £135,000, including VAT where it applies. A typical side extension on a three-bed semi, around 32 m² across both floors, usually costs £68,000–£88,000 built to a plastered finish. Kitchen units, a bathroom suite, flooring and decorating are priced separately, so you can choose them to suit your budget.

How do I book a survey in Stratford-upon-Avon?

Send the form on this page, use the guide-price tool or call 0800 088 6248 free. We'll ask a few questions about your two-storey extension and arrange a time to visit.

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.

Who approves double-storey extensions in Stratford-upon-Avon?

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

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Other work we do in Stratford-upon-Avon

Call 0800 088 6248 or send us your postcode, and we'll arrange a time to look at the house.