Hip-to-gable loft conversion drawings in Lewisham SE13
A hip-to-gable loft conversion in Lewisham starts at £745 for our fixed-fee permitted development drawings, with no VAT to add. The drawings show how your sloping side roof becomes a vertical gable wall, and how much extra roof volume that adds.
Fixed fee from £545 drawings + £200 survey (£745 total) · all prices
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What a hip-to-gable does to a Lewisham house
A hipped roof slopes away on three or four sides. On a semi-detached or end-of-terrace house, the sloping side leaves a narrow, low section of loft beside the ridge. A hip-to-gable conversion pushes that slope out into a flat, vertical gable wall, and the roof ridge extends over the new wall. The result is a loft floor wide enough for a proper staircase, a double bedroom and often a shower room.
That reshaping is what you are paying drawings for. The set shows the existing roof, the new gable, the staircase position, the headroom and the new volume, so a planning officer or a builder can read exactly what is proposed.
Do you need planning permission in SE13?
Often the answer is no, because a hip-to-gable can fall under permitted development. The General Permitted Development Order sets a volume limit on roof additions in Class B: 40 cubic metres in the case of a terrace house, and 50 cubic metres in any other case. A hip-to-gable counts towards that total, so the allowance matters.
Which allowance applies depends on how your house is classed, and the figure is not a rounding exercise. Measuring the existing and proposed roof properly is part of what the drawings do, so you know before you build whether the new volume sits inside the limit.
Permitted development is not the same as no paperwork. You can apply to the council for a certificate that proves the work is lawful, and Lewisham decided 722 certificates of lawful development across the eight quarters in the MHCLG tables. That shows the route is in regular use in the borough.
For Lewisham, its casework database records 162 householder-development appeals decided as allowed or dismissed, and 30% of those were allowed.
Conservation areas and rights that can be removed
Lewisham has 30 live conservation areas in the national Planning Data Platform. Permitted development rights can be restricted in a conservation area or by a local direction that removes them, so check your own address rather than assume.
Before you spend on a design, find out whether your street is in one. If it is, a full householder planning application may be the right route rather than relying on permitted development, and the drawings you need change with it.
What Lewisham's recent householder decisions show
In the four most recent quarters of the MHCLG release, Lewisham made 578 householder decisions, including prior approvals, and granted 89% of them. Of the householder applications that were not prior approvals, 95% were decided within 8 weeks.
These are borough-wide householder figures. They cover every kind of home improvement, not hip-to-gable lofts alone, so read them as a general picture of how householder applications in Lewisham are decided and no more.
When a refusal goes to appeal
Some refused applications go to the Planning Inspectorate. For Lewisham, its casework database records 162 householder-development appeals decided as allowed or dismissed, and 30% of those were allowed.
That is a reason to get the drawings right the first time, with a clear existing and proposed roof, accurate dimensions and a scheme that respects the street, rather than count on an appeal to rescue a weak submission.
What our fixed fee covers
Our published starting fee for hip-to-gable loft conversion permitted development drawings is £745 with no VAT to add. It is on the pricing page with every other fee, with no form in front of it.
If your project needs more than the starting scope, check the pricing page for the fee that matches it before you ask for anything.
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, with no VAT to add, 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 |
| 578 | Our analysis of MHCLG planning application statistics, table PS2 (district open data table) (released 24 Sep 2026, quarters to 2026 Q2) | www.gov.uk |
| 89% | Our analysis of MHCLG planning application statistics, table PS2 (district open data table) (released 24 Sep 2026, quarters to 2026 Q2) | www.gov.uk |
| 95% | Our analysis of MHCLG planning application statistics, table PS2 (district open data table) (released 24 Sep 2026, quarters to 2026 Q2) | www.gov.uk |
| 162 | Our analysis of Planning Inspectorate Casework Database (released 1 Oct 2026 (Casework Database 2609)) | www.gov.uk |
| 30% | Our analysis of Planning Inspectorate Casework Database (released 1 Oct 2026 (Casework Database 2609)) | www.gov.uk |
| 30 | 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 |
| 722 | Our analysis of MHCLG planning application statistics, table PS1 (district open data table) (released 24 Sep 2026, quarters to 2026 Q2) | www.gov.uk |
Photographs: Chris Whippet (CC BY-SA 2.0); GRALISTAIR (CC BY-SA 4.0); David Hawgood (CC BY-SA 2.0).
