House extension drawings in Islington

Upper floors and the Islington Urban Design Guide SPD

Adding a floor is a narrower path. Half-width rear extensions higher than 2 storeys are normally resisted, and inside a conservation area an extension that takes the total above that is not normally permitted.

A single half-width upper-floor extension above an existing back addition is often acceptable if a gap is left below the eaves. Where paired back additions have a consistent roofline, adding to one of them is the case to avoid. The difference between those two outcomes can be small on a section, which is why we draw the neighbour's roof as well as yours.

If a second storey is on your list, our double-storey extension drawings in Islington go through that route in detail.

Conservation areas, listed houses and permitted development

Islington has 41 conservation areas and 1,050 listed building entries. That makes the constraints check the first job on any project here.

Permitted development is withdrawn for side extensions in a conservation area, and flats have no householder rights at all. In Islington's blocks of flats and maisonettes, an extension is nearly always a planning application. Where a house does qualify, a Lawful Development Certificate in Islington confirms a single-storey rear extension in writing under the national rule: 3 m (attached) / 4 m (detached) beyond the original rear wall, single storey.

The borough has no Green Belt, at 0 per cent, so the proportionality test that applies on the edge of London does not come up.

Islington's housing mix and why it shapes the drawings

Only about 16.3 per cent of Islington households live in a house, and 26.7 per cent own their home. Where a home is leasehold, a freeholder's consent or a lease clause can be part of the project, and a party wall notice often is.

Garden land is scarce as well: domestic gardens cover about 19.7 per cent of the borough's land. The Guide asks for enough usable garden to be kept, so a lower-ground extension needs a clear drawing of what remains.

How Islington decides householder applications

In its latest published year Islington decided 337 householder applications, granted 92.6 per cent and decided 98.8 per cent in time. The fee is £548, paid to the council.

Those figures cover every kind of householder project, and we treat them as a guide to timing only.

Drawings, price and nearby boroughs

An Islington extension set shows existing and proposed floor plans, elevations and sections, plus the location and block plans, from one model. Drawings start at £695 with VAT included, a second MCIAT chartered technologist checks each sheet, and we redraw at no charge if the council asks for changes.

For a single room at the back, see rear extension drawings in Islington. The borough overview is architectural drawings in Islington, and neighbours in Hackney or Camden work to their own guidance.