Loft extension in Wandsworth with a hip-to-gable roof
A hip-to-gable loft extension in Wandsworth swaps a sloping side roof for a vertical gable wall, and it can be permitted development within 40 cubic metres on a terrace or 50 on any other house. Wandsworth granted 92% of its 977 householder decisions in the latest four quarters. Drawings start at £745.
Fixed fee from £545 drawings + £200 survey (£745 total) · all prices
Prefer to talk it through?
Why the gable end changes the volume sum
Filling in a hipped side roof adds space on its own, before any dormer goes on the back. All of it counts toward the Class B allowance: 40 cubic metres for a terraced house and 50 cubic metres for any other house.
An end-of-terrace house is the case to watch. It is classed as a terrace, so it gets the lower figure even though the gable is exposed. We calculate the volume on the drawing so the number is checked before anything is submitted.
A council that grants most householder cases
Our analysis of the MHCLG planning application statistics (table PS2) shows Wandsworth granted 92% of 977 householder decisions in the four quarters to mid-2026. Of the decisions that were not prior approvals, 91% came within eight weeks.
If you apply, leave some room in your programme. Our Wandsworth planning permission page describes the route.
Our analysis of table PS1 counts 695 certificates of lawful development decided in Wandsworth over eight quarters.
What happened at appeal
Our analysis of the Planning Inspectorate casework database counts 204 householder appeals decided for Wandsworth between 2021 and 2026, and 36% were allowed. Those are past outcomes. Our drawings show the roof from every side so that the council can judge the scheme as a whole.
47 conservation-area entries
The national register, analysed from the MHCLG Planning Data Platform, lists 47 conservation-area entries for Wandsworth. A house inside one cannot use Class B, and an Article 4 direction can remove the right elsewhere. Our Article 4 guide shows how to check, and the council's own map is the final word.
Certificates, fees and the wider loft menu
Our analysis of table PS1 counts 695 certificates of lawful development decided in Wandsworth over eight quarters. Hip-to-gable drawings start at £745, and we draw dormer-only schemes too.
Compare other roof types on the Wandsworth loft conversion drawings page, and plan the new rooms with our Wandsworth floor plans.
Sources
Every figure on this page, where it comes from and a link to the original.
| Figure | Source | Link |
|---|---|---|
| £745 | DrawingsDirect starting fixed fee for hip-to-gable loft conversion permitted development drawings, from the published price list | drawingsdirect.co.uk |
| 40 cubic metres | GPDO 2015 Sch 2 Pt 1 Class B.1(d)(i): roof additions may add up to 40 cubic metres to the roof space of a terrace house (source wording: "40 cubic metres in the case of a terrace house") | www.legislation.gov.uk |
| 50 cubic metres | GPDO 2015 Sch 2 Pt 1 Class B.1(d)(ii): roof additions may add up to 50 cubic metres to the roof space of any other house (source wording: "50 cubic metres in any other case") | www.legislation.gov.uk |
| 977 | Our analysis of MHCLG planning application statistics, table PS2 (district open data table) (released 24 Sep 2026, quarters to 2026 Q2) | www.gov.uk |
| 92% | Our analysis of MHCLG planning application statistics, table PS2 (district open data table) (released 24 Sep 2026, quarters to 2026 Q2) | www.gov.uk |
| 91% | Our analysis of MHCLG planning application statistics, table PS2 (district open data table) (released 24 Sep 2026, quarters to 2026 Q2) | www.gov.uk |
| 204 | Our analysis of Planning Inspectorate Casework Database (released 1 Oct 2026 (Casework Database 2609)) | www.gov.uk |
| 36% | Our analysis of Planning Inspectorate Casework Database (released 1 Oct 2026 (Casework Database 2609)) | www.gov.uk |
| 47 | Our analysis of MHCLG Planning Data Platform conservation-area and article-4-direction datasets (bulk snapshot retrieved 19 Oct 2026) | www.planning.data.gov.uk |
| 695 | Our analysis of MHCLG planning application statistics, table PS1 (district open data table) (released 24 Sep 2026, quarters to 2026 Q2) | www.gov.uk |
Questions people ask
Can I do a hip-to-gable loft conversion in Wandsworth without planning permission?
How much does hip-to-gable loft drawing cost?
Does Wandsworth have many conservation areas?
Photographs: PAUL FARMER (CC BY-SA 2.0); David Hawgood (CC BY-SA 2.0).
