Loft conversions in Longbridge

Loft conversions in Longbridge: approvals and local details

Before work starts on your loft conversion in Longbridge, two things get checked: whether planning permission from Birmingham City 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.

Roof lights can usually go in without planning permission as long as they don't project more than 150 mm from the roof slope.
Every habitable loft room needs Building Regulations approval, including fire protection to the stairway below.
Permitted development allows up to 40 m³ of extra roof volume on a terraced house and 50 m³ on other houses.

Postcode districts: B31, B38
Planning and building control: Birmingham City Council
From our West Bromwich base: 8 miles

Options to consider in Longbridge

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.

Mansard conversion

The rear roof slope is rebuilt almost vertically, at around 70 degrees, with a flat top and windows set into it. It gives the most space but changes the roof shape significantly, so it normally needs a planning application. It can suit terraces where a dormer would be too limited, and it's the most expensive of the common types.

Loft conversions prices in Longbridge

Prices in Longbridge match the rest of our area: £22,000–£72,000 depending on size and specification. A rear dormer with a double bedroom and shower room on a three-bed semi: usually £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. Your fixed price for the agreed specification follows a free survey at your Longbridge address.

Questions about loft conversions in Longbridge

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.

How do I book a survey in Longbridge?

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.

Is my loft suitable for conversion?

Measure from the top of a ceiling joist to the underside of the ridge. Around 2.2 metres or more usually means a conversion is practical; less than that may still work with a dormer or lowered ceilings but costs more. Roof structure matters too, as older cut-timber roofs are simpler to convert than modern trussed roofs, which need more steel. We check all of this at the free survey.

Does Birmingham City Council need to approve my loft conversion?

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

Close to Longbridge

Other home improvements in Longbridge

Ring 0800 088 6248 to talk through your loft, or send your postcode and we'll arrange a visit.