Mansard loft conversions in Havant

Covering Havant

Our coverage around Havant (PO9) also includes Waterlooville (3 miles to the north-west) and Portsmouth.

Homes in the South East

The South East has a lot of 1930s and post-war semi-detached housing, well suited to rear extensions and hip-to-gable loft conversions, alongside period properties in conservation areas that need a more careful design.

What is a mansard loft conversion?

Mansards are a bigger structural job than other conversions because the roof is largely rebuilt. They normally need planning permission, and many councils have design guides setting the angle, materials and window style. We prepare the design to those guides and build in slate, lead and timber or approved alternatives.

Planning application to local design guidance
Slate cladding and lead-clad dormers
En-suite, electrics and fire safety

How much should I budget for a mansard loft conversion?

Typical ranges for mansard loft conversions. Ground conditions, access and specification move the final figure, which we fix in writing before work starts.

Mansard loft conversions	Guide price incl. VAT
Rear mansard	£65,000 to £85,000
Front and rear (double) mansard	£80,000 to £110,000

Planning and building rules in Havant

In England we deal with the council’s planning team for permission or a lawful development certificate, with building control (the council or a registered building control approver) for inspections, and with neighbours under the Party Wall etc. Act 1996 where it applies.

Mansard conversions change the shape of the roof significantly, so they usually need planning permission in England. Many councils publish guidance on mansard design.

What can affect a mansard loft conversion?

A mansard nearly always involves party walls on both sides of a terrace.
Council design guides often require natural slate and lead.

What happens after I enquire?

Start with a conversation. A short call or the online form is enough for us to understand what you want to build.
Free site visit. We measure up, look at access, drains and the structure, and talk through options and budget.
Drawings, approvals, written quote. We prepare the design, apply for the approvals it needs, and give you a fixed price in writing.
Build and hand over. Our teams build to the programme, building control inspects, and you get the completion paperwork at the end.

Questions about a mansard loft conversion in Havant

Does a mansard need planning permission?

Almost always, because it changes the roof profile.

Why choose a mansard over a dormer?

A mansard gives more usable space and often fits a street better where neighbours already have one.

Can you visit a house in Havant to quote?

Yes. After a short call we arrange a site visit to measure up and agree what the design needs to do, then send a written price.

Mansard loft conversions in nearby towns

Learn more about mansard loft conversions, or see every project we cover in Havant.