Mansard loft conversion drawings in West Norwood, SE27
A mansard loft in West Norwood replaces the sloping roof with a near-vertical slope and a flat top, which gives full-height rooms but changes the street view. DrawingsDirect draws mansard loft conversions for SE27 homes from £845, with the planning route checked first.
Fixed fee from £645 drawings + £200 survey (£845 total) · all prices
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What a mansard changes, and why the council looks closely
A mansard rebuilds the roof, so it alters the skyline of a terrace more than a dormer does. Officers look at height, the pitch of the front slope, materials and how the new roof sits against neighbouring houses.
A mansard usually needs a planning application. Permitted roof additions to a terrace house are capped at 40 cubic metres, and a full mansard rarely fits within the permitted development conditions. Our mansard loft conversion cost guide covers the build side.
What Lambeth's decision records show
West Norwood is in the London Borough of Lambeth. The council made 595 householder decisions in the four quarters to 2026 Q2, counting prior approvals (our analysis of MHCLG planning application statistics, table PS2), and granted 83% of them (same analysis). Those are past decisions across the borough.
Where an applicant appealed a householder refusal, 34% of the appeals decided between 2021 and 2026 were allowed (our analysis of the Planning Inspectorate Casework Database). An appeal is slow and uncertain, which is why we draw the scheme to meet the council's design concerns from the start.
The council made 595 householder decisions in the four quarters to 2026 Q2, counting prior approvals (our analysis of MHCLG planning application statistics, table PS2), and granted 83% of them (same analysis).
Conservation areas around SE27
The national register lists 65 conservation-area entries under Lambeth (our analysis of MHCLG Planning Data Platform conservation-area and article-4-direction datasets). Roof alterations are scrutinised more closely inside them. Search your road on the government conservation-area dataset and on Lambeth's own conservation area map, then read our conservation area entry.
Timing, fees and our price
A householder application that is not major development has a decision period of 8 weeks, counted from the day after receipt. The statutory householder fee is £548 from 1 April 2026, paid to the council.
Our fixed fee for mansard loft conversion drawings starts from £845, and every other fee is on the pricing page. The mansard loft conversion drawings service page lists the sheets in a set. Send your address and a photo of the roof through the form on this page.
Sources
Every figure on this page, where it comes from and a link to the original.
| Figure | Source | Link |
|---|---|---|
| 595 | Our analysis of MHCLG planning application statistics, table PS2 (district open data table) (released 24 Sep 2026, quarters to 2026 Q2) | www.gov.uk |
| 83% | Our analysis of MHCLG planning application statistics, table PS2 (district open data table) (released 24 Sep 2026, quarters to 2026 Q2) | www.gov.uk |
| 34% | Our analysis of Planning Inspectorate Casework Database (released 1 Oct 2026 (Casework Database 2609)) | www.gov.uk |
| 65 | Our analysis of MHCLG Planning Data Platform conservation-area and article-4-direction datasets (bulk snapshot retrieved 14 Aug 2026) | www.planning.data.gov.uk |
| 8 weeks | DMPO 2015 art 34(2)(b): decision period for an application that is not major development (source wording: 8 weeks beginning with the day immediately following receipt) | www.legislation.gov.uk |
| £548 | Statutory fee from 1 April 2026, SI 2012/2920 Sch 1 Pt 2 category 6(1): householder application for alterations or extensions to a single dwellinghouse | assets.publishing.service.gov.uk |
| 40 cubic metres | GPDO 2015 Sch 2 Pt 1 Class B.1(d): roof space volume addition limit, terrace house (source wording: 40 cubic metres) | www.legislation.gov.uk |
| £845 | DrawingsDirect starting fixed fee for mansard loft conversion drawings, from the published price list | drawingsdirect.co.uk |
Questions people ask
How much are mansard loft drawings in West Norwood?
Is a mansard the same as a loft extension?
Will Lambeth accept a mansard on my road?
Photographs: GRALISTAIR (CC BY-SA 4.0).
