Double-storey extensions in Coseley

Before your two-storey extension in Coseley

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

Councils often expect a side extension's first floor to be set back from the front wall, with its roof below the main ridge.
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.

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

Options to consider in Coseley

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.

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.

Guide prices for Coseley

Expect to budget between £52,000 and £135,000 depending on size and specification in Coseley. 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. Your fixed price for the agreed specification follows a free survey at your Coseley address.

Your questions answered

Can we stay in the house while you build?

Most families do. The early stages are outside, and the existing house stays closed off until the shell is weathertight. The harder weeks are when openings are cut through on both floors, which brings dust and noise into bedrooms and the kitchen. We sheet off openings, lock up securely every night and agree in advance which rooms you'll lose and when.

Which postcodes in Coseley do you work in?

We cover WV14 and the streets around them. If you're on the edge of Coseley, neighbouring Tipton and Sedgley are covered too.

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 Coseley?

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

Double-storey extensions near Coseley

More services in Coseley

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