Double-storey extensions in Bilston

What should you know before starting in Bilston?

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

An upstairs en-suite is simplest when the new bathroom sits close to the existing soil stack.
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.
Party wall notices take one or two months to run, so they're best served as soon as planning is granted.

Postcode district: WV14
Planning and building control: City of Wolverhampton Council
From our West Bromwich base: 4 miles

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.

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.

How much should you budget in Bilston?

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. Your fixed price for the agreed specification follows a free survey at your Bilston address.

Before you book in Bilston

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.

Which postcodes in Bilston do you work in?

We cover WV14 and the streets around them. If you're on the edge of Bilston, neighbouring Willenhall and Darlaston are covered too.

Is a double-storey extension better value than a single-storey one?

Per square metre, usually yes. Foundations and roofs are the expensive parts of any extension, and on a two-storey build they serve twice the floor area. You'll pay more in total and planning is less certain, but if you need a bedroom as well as downstairs space, building both together normally costs less than two separate projects years apart.

Will I need permission from the council in Bilston?

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

Nearby places we cover

Other home improvements in Bilston

Want a guide figure first? Use our quote tool for your Bilston extension, then book a survey for a fixed price for the agreed specification.