Single-storey extensions in Penn

Planning your single-storey extension in Penn

Before work starts on your single-storey extension in Penn, two things get checked: whether planning permission from City of Wolverhampton Council is needed, and how Building Regulations approval will be obtained. If you share a wall with a neighbour, the Party Wall etc. Act 1996 may apply as well.

Wide glazed doors and roof lights make the biggest difference to how bright the new room feels, and to the final price.
Every extension needs Building Regulations approval, even when planning permission isn't required.
Under permitted development, a rear extension on a semi or terrace can usually project 3 metres from the original back wall, or 6 metres through the prior approval route.

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

Which options suit homes in Penn?

Flat roof or pitched roof

Flat roofs, usually GRP fibreglass or EPDM rubber, keep the height down near boundaries and suit roof lanterns. Pitched or lean-to roofs with tiles to match the house look more traditional and shed rain faster, but need more height. The choice affects permitted development limits, cost, and how much light reaches the existing rooms.

Wrap-around extension

Combines a side and rear extension into an L shape, giving the largest ground-floor gain. Because it extends both sideways and rearwards, a wrap-around normally needs a householder planning application rather than relying on permitted development. Expect more steelwork and a more involved roof where the two sections meet.

Single-storey extensions prices in Penn

For a home in Penn, our guide range is £28,000–£90,000 depending on size and specification. A 4 m × 5 m rear extension on a semi, with roof lights and bifold doors: usually £40,000–£52,000.

Guide prices for single-storey extensions
Option	Guide price	Good to know
Small rear or side extension (10–15 m²)	£28,000 – £40,000	Utility, WC or a modest kitchen extension
Rear kitchen-diner extension (18–25 m²)	£38,000 – £58,000	The glazing spec moves it within the range
Wrap-around or large extension (30 m²+)	£58,000 – £90,000	More steel and roof, and normally a planning application

Guide ranges include VAT where it applies. A free survey turns this guide into a fixed, itemised price.

Questions about single-storey extensions in Penn

Do I need to tell my neighbours about an extension?

You don't need their permission for permitted development, but you will usually need to involve them. Under the prior approval route the council writes to adjoining neighbours and gives them 21 days to comment. If the build is on the boundary or the foundations are deep and close to their house, the Party Wall Act requires formal written notice. A friendly conversation before any notice arrives usually makes everything smoother.

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 single-storey extension and arrange a time to visit.

Can we live at home during the build?

Yes, most families stay at home throughout. For the first several weeks the work is outside and your house is closed off from it. The disruptive part is the break-through, when the back wall comes out and the kitchen may be out of action for one to three weeks. We agree a plan for a temporary sink and cooking space before that stage starts.

Does City of Wolverhampton Council need to approve my single-storey extension?

Usually building control, and sometimes planning. City of Wolverhampton Council is the planning authority for Penn; Building Regulations approval comes from its building control team or a registered building control approver. We'll tell you which applies after the survey.

Also covering nearby

Other home improvements in Penn

Book a free survey in Penn and we'll measure up, check the drains and boundaries, and give you a written, itemised quote.