Double-storey extensions in Dorridge

Planning your two-storey extension in Dorridge

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

Party wall notices take one or two months to run, so they're best served as soon as planning is granted.
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.
Councils often expect a side extension's first floor to be set back from the front wall, with its roof below the main ridge.

Postcode district: B93
Planning and building control: Solihull Council
From our West Bromwich base: 14 miles

Choices to weigh up in Dorridge

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.

Combined side and rear

An L-shaped two-storey build wrapping the side and back of the house gives the biggest gain, sometimes two extra bedrooms. It's a substantial project with more steel and a complex roof junction, and it will need a householder planning application. Expect a longer programme and a careful plan for keeping the house secure while the roofs are joined.

Double-storey extensions prices in Dorridge

For a home in Dorridge, 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. Your fixed price for the agreed specification follows a free survey at your Dorridge address.

Before you book in Dorridge

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 Dorridge?

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 Dorridge?

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

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Ask for a free survey in Dorridge and we'll tell you what's likely to get planning before you pay for drawings.