Hip-to-gable loft conversion drawings in Tower Hamlets

Designations come first

Tower Hamlets has 59 conservation areas and 64 Article 4 directions covering 63 mapped areas. Historic England records 916 listed entries here, and 72 tree preservation orders add a further layer around gardens and streets.

Inside a conservation area the position is clear-cut: Class B roof enlargements are not permitted development on article 2(3) land. A given street may or may not be covered, even within one neighbourhood. We map your address against every layer before a fee is agreed.

A borough where houses are the exception

Only 12 per cent of Tower Hamlets households live in a house and 23.1 per cent own their home. A terrace averages £690,210, more than a semi at £666,730, so whoever owns a terraced house here holds a scarce asset and usually wants the roof changed with care.

Flats make up the rest, and they hold no householder rights. If your home is a flat, a roof change needs a planning application and the freeholder's consent. If the building is converted, the roof may belong to someone else altogether, and we check the lease and title position early so your fee is not spent on a design that cannot go ahead.

How Tower Hamlets decides householder cases

Tower Hamlets decided only 191 householder applications in its latest year, a small number reflecting how few houses it has, and granted 92.7 per cent. 95.8 per cent were decided in time.

A small sample cannot tell you how your roof will be judged. If the house is outside any designation and the volume is within limits, a Lawful Development Certificate in Tower Hamlets is the right record. Otherwise our planning drawings in Tower Hamlets support a householder application, with the heritage case set out.

The roof volume and the gable

Where the right is open, a terrace is limited to this: 40 m³ (terrace house) / 50 m³ (any other house) additional roof volume. A hip-to-gable benefits from one relief: Eaves-retention and 0.2 m set-back conditions do not apply to a hip-to-gable enlargement. We tabulate the volume before and after, so the figure is on the drawing.

Gardens here are tiny, covering 7.4 per cent of the borough's land, so going up is often the only way to add space. That makes a careful loft design all the more important.

Because older houses vary so much, we also look at what the roof is made of before promising anything. Original purlins, lath-and-plaster ceilings and shared chimney stacks all affect how the new wall can be built, and a measured survey records them so the builder is not surprised once the slates are off.

Stairs, fire and neighbours

Older terraced houses often have steep, tight stairs, and the new flight must meet Approved Document K. The reduced standard is: 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). We prove the line on a long section before the design is chosen.

Fire protection and structure then go into the building regulations drawings in Tower Hamlets. A new gable wall usually meets the neighbour's property, so a party wall notice is almost always part of the process, and we raise it at the start.

Ask for the constraints check

Send the address, tell us whether the building is a house or a converted flat, and add a photograph of the roof. The check is free, and any fee that follows is fixed and includes VAT; no standard price is published. See also loft conversion drawings in Tower Hamlets, architectural drawings in Tower Hamlets and the explainer at hip-to-gable loft conversion drawings.