Double-storey extensions in Penn

Planning your two-storey extension in Penn

Planning permission from City of Wolverhampton Council is the first hurdle for most double-storey extensions in Penn. 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.
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.
Scaffolding is usually up for most of the build, so think about access along the side of the house early.

Postcode district: WV4
Planning and building control: City of Wolverhampton Council
From our West Bromwich base: 7 miles

Which option fits your home?

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.

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.

What does your two-storey extension cost in Penn?

For a home in Penn, our guide range is £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. We confirm a fixed price for the agreed specification after visiting.

Double-storey extensions in Penn: 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.

How do I book a survey in Penn?

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.

What paperwork will I have at the end?

You'll get the building control completion certificate, the electrical installation certificate, your planning decision notice and the manufacturers' guarantee documents for windows, doors and roof products, with their terms set out in your quote. Keep these together, as a buyer's solicitor will ask for them when you sell. Ask us for current insurance details with your quote.

Will I need permission from the council in Penn?

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.

Double-storey extensions near Penn

Other home improvements in Penn

Call 0800 088 6248 or send us your postcode, and we'll arrange a time to look at the house.