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Loft Conversions

Mansard loft conversions in Manchester

The most space you can get from a loft, with a near-vertical rear wall and a flat roof above.

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Space gained
The most of any loft type
Planning
Usually required
Best for
Terraced houses
Quote
Free site visit

A mansard loft conversion replaces the rear roof slope with a much steeper one, at around 70 degrees, topped with a flat roof. Windows sit in small dormers within the slope. The result is close to a full extra storey, and it often looks more traditional than a large box dormer.

Mansards are most common on terraced houses. Because they change the roof shape significantly, they usually need planning permission. Compare all options on our loft conversions page, or see dormer loft conversions for a simpler alternative.

Planning permission for mansards

Mansard conversions normally fall outside permitted development, so a planning application is needed. Councils generally look for a design that suits the street and respects neighbours. We prepare drawings with you and allow time for the application in the programme. Read do I need planning permission for a loft conversion?

What is included

  • Maximum space

    Close to a full extra storey in the roof.

  • Traditional look

    Slate or tile slopes with neat window dormers.

  • Planning prepared

    Drawings and application handled for you.

  • Full structural design

    Steels, joists and calculations signed off.

How your mansard loft conversion project runs

The same clear process on every job, whatever the size.

  1. Free site visit

    We come to you, measure up and talk through what you want, what is possible and a realistic budget.

  2. Written quote

    A detailed, itemised quote with no hidden costs, so you know exactly what is included before you commit.

  3. Drawings and approvals

    We line up drawings, structural calculations, planning or permitted development, Building Control and party wall notices.

  4. The build

    One point of contact, a tidy and safe site, and regular updates so you always know what is happening next.

  5. Sign-off and handover

    Building Control completion, snagging and a final walk-round together before we hand back your home.

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Read our reviews on Google

“Builders Manchester Ltd recently completed an extension and loft conversion at my property. Their work was of an excellent standard from start to finish.”

Jake RobertsExtension and loft conversion, Google review

Mansard loft conversions across Greater Manchester

We build mansard loft conversions throughout south Manchester, Stockport and Trafford. Choose your area for local planning notes.

Manchester

Stockport

Trafford

Mansard loft conversions: common questions

More answers on our FAQ page.

Does a mansard loft conversion need planning permission?

Usually, yes. Because it changes the roof shape significantly, a mansard normally needs a planning application.

Mansard or dormer: which is better?

A mansard gives more space and often looks more traditional, but it costs more and usually needs planning. A rear dormer is quicker and often permitted development.

How long does a mansard conversion take?

Typically around 10 to 14 weeks on site, after planning approval.

Helpful guides

Related services

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