Kitchen Extensions Holloway

Houses are a small share of Holloway: the VOA count puts terraced houses at 9% of homes and semis or detached houses at 1%, and 90% of homes are flats. A kitchen extension here is therefore either a terrace job in the N7 side streets or a ground floor flat that needs full planning permission, because a flat carries no householder permitted development rights. We build the rear or side addition, set the steel into the old back wall, and fit the new kitchen inside the same programme.

In Holloway, a rear kitchen extension of about 30 square metres typically costs £45,000 to £97,500 excluding VAT, or £60,000 to £100,000 for a side return (indicative London ranges, Resi, MyBuilder and Checkatrade, 2026). GS Renovation Ltd, a building contractor based in Potters Bar, does the work in Holloway: the structural engineer we appoint designs the foundations and steel, we build the room and fit the kitchen, and a registered electrician certifies the electrics.

Which kitchen extension a Holloway terrace can take

Islington's Urban Design Guide says there will normally be scope for a ground floor extension on a house with a back addition, either within the lightwell beside that addition or beyond its line, provided enough useable garden is kept. The guide covers the whole borough, and on a Holloway terrace the proviso about garden decides the depth before anything else does. The first drawing we ask the designer for therefore shows the garden that remains, not only the new room.

Filling the lightwell gives a wider kitchen without eating far into the yard, and it keeps the existing back addition as a pantry, utility or cloakroom. Going beyond the back addition gives more length but reaches the neighbour's windows sooner. A lightwell infill usually opens the flank wall of the addition and part of the main rear wall, while a longer extension opens the end wall of the addition instead. Either way the structural engineer we appoint designs the steel for each opening before the order goes in.

Housing in Holloway

Holloway has around 10,640 homes on the Council Tax list: 50% post-war, 6% interwar and 40% predate 1919, with 90% flats and 10% houses. Where most homes are flats, only a ground floor flat in Holloway with its own garden can extend its kitchen.

The 45 degree test against your neighbour's rear window

Islington's Urban Design Guide gives a simple test for depth that applies on a Holloway terrace as anywhere else in the borough. If the centre of a neighbour's main rear window falls within a 45 degree line from the end of your proposed extension, the depth is likely to have an unacceptable impact. Draw that line on the plan early, because it can shorten a scheme that looked fine on paper. On a terrace the neighbour's window is often only a short step from the boundary, so the test bites quickly.

A stepped plan is one answer, deeper on your own side and shallower where the neighbour's window sits. We price the version that has passed the test, not the first sketch, because a change of depth after a planning officer comments changes the steel, the roof and the kitchen layout with it. Digging foundations close to the shared wall often brings the Party Wall etc. Act into play as well. The building owner serves the notices, and Islington says it takes no part in party wall agreements, so that timetable sits with you and any party wall surveyor.

A glazed or contrasting rear addition on a Holloway terrace

Islington's Urban Design Guide says a single storey rear extension may suit high quality contemporary design, including contrasting materials or a lightweight glazed form. For a Holloway kitchen that opens the door to a slim framed glass box against the old brick, or a darker clad volume that reads as new rather than copying the old wall. It also lets the room borrow daylight from above, which matters when a terrace kitchen sits deep in the plan with only one outside wall.

A lightweight glazed form puts more load on detail than on bulk. The roof glazing needs falls and a gutter that clears the party wall, and glass in doors and low panes has to be safety glazing under Part K. A large glazed area also has to be justified in the Part L energy calculation, and a south facing glass roof needs solar control glass or the room overheats in summer. We agree the glazing supplier's lead time at the start, because made to measure frames often set the date the kitchen can be closed in.

Flats need planning, and Holloway houses have limits

If your Holloway home is a flat, the extension starts with a full planning application, because Islington says you need one to add an extension or conservatory to a flat. That applies to a garden flat in a converted terrace as much as to anything else. The freeholder's consent under the lease is a separate paper, and we build nothing until both are in hand and the approved drawings match what the kitchen designer has drawn.

A house keeps its permitted development rights, within limits. Under the national rules a single storey rear extension on a terraced house cannot go more than three metres beyond the original rear wall. The larger prior approval route is not available on designated land such as a conservation area, and there every side extension needs householder permission. In the 40 of Islington's 42 conservation areas with an article 4 direction, minor changes such as new external doors and windows can need permission too, which matters when a Holloway kitchen changes the rear openings.

• Floor levels matched through the old opening
• Sliding, bifold and steel-framed glazed doors to the garden
• Utility rooms and larders at the back of the extension

VOA Council Tax stock of properties, March 2025, for Holloway Nag's Head and Lower Holloway. Counts rounded by the VOA.

Before committing to kitchen extensions in Holloway, it is worth looking at kitchen renovation in Holloway, kitchen extensions across Islington, fitting the kitchen itself, sign-off by building control on a kitchen extension, our London kitchen extensions page and Getting Daylight Into a Deep Plan.

Why Holloway Homeowners Choose GS Renovation

We run the kitchen extension and the kitchen itself as one programme, so the drainage runs, the steel, the floor build up and the worktop template follow each other without a gap between two firms. The structural engineer we appoint sizes the steel, a registered electrician certifies the new circuits, and building control inspects the stages. You get a written quotation after a survey of the house, and the programme shows when you lose the old kitchen and when you get the new one.

• Founder with 30+ years of hands-on experience
• One contract for the groundworks, the steel and the kitchen fit
• Boiler flue, soil pipe and gully moved off the rear wall in the right order

Checked by Abdelaaziz Saaid, founder and director of GS Renovation Ltd (Companies House no. 14611254). Structural design is by the consulting engineer appointed to your project.