Loft conversions in Birmingham

Planning your loft conversion in Birmingham

Birmingham City Council is the planning authority for Birmingham. If your plans need permission, apply early: householder applications have an eight-week target for a decision. Building Regulations approval and inspections run alongside the build.

A dormer on the roof slope facing the street, or one that rises above the ridge, needs a planning application.
On a semi or terrace, steel beams bearing on the shared wall need two months' party wall notice.
Mains-powered, interlinked smoke alarms on every floor are part of a compliant loft conversion.

Postcode districts: B1, B7, B9, B10, B12, B18
Planning and building control: Birmingham City Council
From our West Bromwich base: About 6 miles to the centre

Which options suit homes in Birmingham?

Roof-light conversion

The simplest option: the roof shape stays the same and roof windows are fitted into the slope. It works when there's already enough head height, keeps costs down, and is often permitted development because roof lights can project up to 150 mm from the roof plane. You do lose some usable floor area under the sloping ceilings.

Rear dormer conversion

A box-shaped extension built out from the rear roof slope, with vertical walls and a flat roof, giving full standing height across most of the room. It suits semis and terraces because it adds the most usable space for the money. Under permitted development it must be set back from the eaves and stay within the volume allowance.

Loft conversions prices in Birmingham

Expect to budget between £22,000 and £72,000 depending on size and specification in Birmingham. A rear dormer with a double bedroom and shower room on a three-bed semi: typically £42,000–£52,000.

Guide prices for loft conversions
Option	Guide price	Good to know
Roof-light conversion	£22,000 – £32,000	One room, no change to the roof shape
Rear dormer	£38,000 – £55,000	Bedroom and shower room; a good fit for semis and terraces
Hip-to-gable with rear dormer	£48,000 – £68,000	Most usable space; semis and detached houses

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

Loft conversions in Birmingham: common questions

Which certificates will I have once the loft is finished?

You'll receive the building control completion certificate, an electrical installation certificate, and your lawful development certificate or planning decision. Manufacturers' guarantee terms for roof windows, roof coverings and other products are set out in your quote. Keep these documents safe, because a buyer's solicitor will ask for them. If you'd like our current insurance details, ask with your quote.

How do I book a survey in Birmingham?

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 loft conversion and arrange a time to visit.

How long does a loft conversion take?

Most take 6–10 weeks on site, with roof-light conversions at the shorter end and hip-to-gable or mansard work at the longer end. Allow time beforehand for drawings, a lawful development certificate or planning decision, and party wall notices, which need two months on a semi or terrace. We plan the start date around those periods so nothing is left waiting.

Will I need permission from the council in Birmingham?

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

Loft conversions across Birmingham

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Nearby places we cover

More services in Birmingham

Book a free loft survey in Birmingham and we'll measure the head height and tell you which type of conversion fits.