Double-storey extensions in Olton

Double-storey extensions in Olton: approvals and local details

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

New first-floor bedrooms normally need an escape window with at least 0.33 m² of clear openable area.
A side extension of more than one storey always needs a householder planning application.
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: B92
Planning and building control: Solihull Council
From our West Bromwich base: 10 miles

Options to consider in Olton

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.

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 Olton?

Prices in Olton 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.

Double-storey extensions in Olton: common questions

What will the council look at when deciding planning?

Councils judge two-storey extensions mainly on their effect on neighbours and the street. They look at loss of light and outlook next door, overlooking from upstairs windows, and whether the extension sits comfortably with the house, often expecting side extensions to be set back and lower than the main roof. Many councils publish householder design guides, and following yours closely improves the chance of approval.

How do I book a survey in Olton?

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.

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.

Does Solihull Council need to approve my two-storey extension?

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 near Olton

More services in Olton

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