Double-storey extensions in Solihull

Planning your two-storey extension in Solihull

Expect to apply to Solihull Council for planning permission for a two-storey extension in Solihull; side extensions over one storey always need it. We prepare the drawings, and the structural work also needs Building Regulations approval.

Councils often expect a side extension's first floor to be set back from the front wall, with its roof below the main ridge.
Scaffolding is usually up for most of the build, so think about access along the side of the house early.
The householder planning fee in England is £548 from April 2026, paid to Solihull Council when you apply.

Postcode district: B91
Planning and building control: Solihull Council
From our West Bromwich base: About 12 miles to the centre

Which option fits your home?

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.

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.

Guide prices for Solihull

Prices in Solihull 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. We confirm a fixed price for the agreed specification after visiting.

Double-storey extensions in Solihull: common questions

How long does a double-storey extension take?

Plan on 14–22 weeks on site, depending on size and roof complexity. Before that, allow time for drawings, a planning decision (councils aim to decide householder applications within 8 weeks), Building Regulations drawings and party wall notices. It's worth starting the design well ahead of when you need the space, because the approvals stage can take as long as the build.

Do you cover the whole of Solihull?

Yes — we cover Solihull from our West Bromwich base, including Birmingham, Warwickshire and Sandwell. Call 0800 088 6248 or send the form on this page to book a free survey.

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.

Will I need permission from the council in Solihull?

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.

Double-storey extensions across Solihull

We cover every town and district below:

Nearby places we cover

More services in Solihull

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