Hip-to-gable loft conversion drawings in Lewisham

Article 4 directions and conservation areas come first

Lewisham has published 57 Article 4 directions, covering 89 separate mapped areas, and a further 30 conservation areas sit across the borough. Where either applies, the household roof right may be gone, and a planning application becomes the only door.

Historic England records 367 listed entries here, and 21 entries are on its Heritage at Risk register. A listed house needs separate consent for any roof work, whatever the volume. So before we draw a single line we run a constraints check against the council's maps, and tell you in writing which route is open.

Which Lewisham houses suit a gable

Only 42.2 per cent of Lewisham households live in a house, so the stock that can use this work is a minority. Within it, the best candidates are interwar and later semi-detached houses with a hipped flank, where an average semi costs £773,685 against £602,116 for a terrace.

On a terrace the usual limit is the national volume allowance: 40 m³ (terrace house) / 50 m³ (any other house) additional roof volume. A hip-to-gable can use the more generous figure only on a semi or detached house, which is one more reason the type of house matters before the type of drawing does.

Lewisham's record on householder applications

In its latest year the council decided 578 householder applications, granting 89.4 per cent, and 95.2 per cent met the statutory timetable. Those are good figures for planning an enquiry, although they describe householder cases of every kind and say nothing about any single roof.

If the answer for your house is permitted development, the route is a Lawful Development Certificate in Lewisham, and the council has handled 410 certificates in the Planning Service's dataset, so the process is well used. If not, our planning drawings in Lewisham carry the application.

The stair, the headroom and the fire route

A gable that adds floor area only works when a stair can climb to it, and an older house with a narrow flight needs that tested early. Approved Document K gives a fall-back: Loft conversions where 2.0 m cannot be achieved: 1.9 m at the centre of the stair, 1.8 m at the side (half width). Our long section tests the stair against that line before the design is fixed.

A loft becomes a new storey, and the escape route is drawn from the landing downward to the front door. The building regulations drawings in Lewisham translate the chosen scheme into the sheets your builder and building control surveyor price from.

From survey to a frozen design

We measure the roof from inside and outside, tie it to the floors below on one datum and build the house in one model. You then see the gable in plan and in 3D, choose in writing, and the design stops moving. A second chartered technologist checks every sheet before it leaves us.

Where the new gable wall meets a neighbour's, a party wall notice is usually required, and we raise it early. If a rear dormer is part of the plan, our dormer loft conversion drawings in Lewisham cover that half of the job, and the general explanation sits on the hip-to-gable loft conversion drawings page.

Getting a fixed quote

Send the address and photographs of the hipped side. We run the constraints check at no charge, then confirm the route and give a fixed fee that includes VAT. No standard price is published for this service, because the work depends on the house. More about our work in the borough is under architectural drawings in Lewisham.