L-shaped dormer drawings in Waltham Forest

The Waltham Forest numbers behind the design

The borough holds 15 conservation areas and 118 listed buildings, a lower count than the inner boroughs, so many streets are open to permitted development. There are also 15 Article 4 directions, mapped as 807 separate areas, which cover many individual houses.

Inside a conservation area: Class B roof enlargements are not permitted development on article 2(3) land. Trees matter too: the council records 231 tree preservation orders and 218 zones, so a protected tree near the house can limit where the scaffold and the skip go.

The borough is also 22 per cent green belt, so we check the boundary on each address.

How Waltham Forest decides householder applications

In the latest year the council decided 771 householder applications and granted 81.5 per cent. Only 90.7 per cent were decided inside eight weeks or an agreed extension, so allow time in your programme.

That speed matters for a dormer, because the builder usually waits on the decision and the party wall notices run in parallel. We tell you at the start how long the route is likely to take, using the council's recent record, and plan the notices to land at the right time.

Householder figures cover every kind of scheme, so they show the climate rather than the odds for your roof.

A better guide is the planning history of your own street. Walthamstow, Leyton and Leytonstone have many near-identical terraces, so one approved dormer on a matching house is strong evidence, and a refused one tells you what to avoid. We read the decision notices and the officer reports, pick out the objections that mattered, and design around them before anything is submitted.

Where a neighbour has already built a larger L, we say so on the drawings, using the approval reference from the council's register, so the officer can compare like with like.

Details that make the L work

The L is possible largely because of one concession: Eaves-retention and 0.2 m set-back do not apply where the enlargement joins the original roof to the roof of a rear or side extension. The ridge cannot rise above the original: No part higher than the highest part of the existing roof.

Walthamstow terraces share roofs, so notices are routine: Party structure notice at least 2 months before work. Where full stair headroom cannot be reached: 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 sections test the stair before the layout is frozen.

A new storey needs a protected escape: New storey above 4.5 m by loft conversion: protect the full escape route with fire-resisting doors (min E 20) and partitions (min REI 30).

Price and levy

A fixed quote follows a free constraints check, VAT included, because the roof and the junction vary. We redraw free if the council asks for changes.

The borough charges a levy by zone: £108.79/m² (Zone A, north of North Circular); £117.15/m² (Zone B, south of North Circular). The Mayoral levy is in band 2, at £72.73 per square metre this year. Whether either charge applies depends on the new floor area, which our next-steps pack calculates.

Drawings are normally ready about a week after the survey. A second chartered technologist checks every sheet before it is issued, and you approve the design in writing before the drawings are finished.

More from Waltham Forest and its neighbours

For a smaller roof, see dormer loft conversion drawings in Waltham Forest, and for a combined job rear extension drawings in Waltham Forest. The overview is architectural drawings in Waltham Forest.

We draw L-shaped dormers in Redbridge, Enfield and Hackney. The general guide is L-shaped dormer drawings.