Double-storey extensions in Kidderminster

Planning your two-storey extension in Kidderminster

Most two-storey extensions in Kidderminster need a planning application to Wyre Forest District Council. A two-storey rear extension can sometimes be permitted development, but only if it is no more than 3 m deep and at least 7 m from the rear boundary, among other conditions. Building Regulations approval is needed either way.

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.
A side extension of more than one storey always needs a householder planning application.

Postcode district: DY10
Planning and building control: Wyre Forest District Council
From our West Bromwich base: 14 miles

Which options suit homes in Kidderminster?

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 Kidderminster

Expect to budget between £52,000 and £135,000 depending on size and specification in Kidderminster. A two-storey side extension on a three-bed semi, about 32 m² over two floors: typically £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. A free survey turns this guide into a fixed, itemised price.

Your questions answered

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.

How do I book a survey in Kidderminster?

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.

Who approves double-storey extensions in Kidderminster?

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

Double-storey extensions near Kidderminster

Other work we do in Kidderminster

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