Double-storey extensions in Dudley

What should you know before starting in Dudley?

Most two-storey extensions in Dudley need a planning application to Dudley 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.

The householder planning fee in England is £548 from April 2026, paid to Dudley Council when you apply.
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.
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: DY1
Planning and building control: Dudley Council
From our West Bromwich base: About 4 miles to the centre

Options to consider in Dudley

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.

Guide prices for Dudley

Expect to budget between £52,000 and £135,000 depending on size and specification in Dudley. 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 Dudley address.

Double-storey extensions in Dudley: common questions

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.

Do you cover the whole of Dudley?

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

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.

Who approves double-storey extensions in Dudley?

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 across Dudley

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