Hampstead Architecture and Planning

Islington

Kitchen Extension Architects in Holloway

A Holloway kitchen extension is bought as floor area and lived in as light and servicing. These terraces put the original kitchen in a narrow rear wing, so the work is as much about reconnecting that wing to the rest of the ground floor as adding to the back of it. Three decisions carry the project: the structural opening, where the extract can physically go, and what the drainage does to the foundations.

Last updated

Book an Architectural ConsultationGet your fixed-fee packageor call 020 8054 8756

The short answer

What makes a Holloway kitchen extension work?

Three things settled before the kitchen is drawn: a beam sized by an engineer, because its depth sets the finished ceiling; an extract route that genuinely meets Part F, which on a mid-terrace house means planning the duct to the rear elevation from the start; and a drainage survey, because the runs here are rarely where the deeds suggest. On depth, prior approval is closed on designated land, so the figure is argued against the neighbours’ rear building line rather than notified.

Planning at a glance

Holloway

Planning at a glance in Holloway
Local planning authorityIslington
Likely approval routeHouseholder planning application or permitted development, depending on conservation status, listing and property type — confirmed for the exact address before drawings begin
Statutory determination time8 weeks for most householder applications (13 weeks for major applications)
Where most projects startPlanning Route Review — £395 inc. VAT, credited in full against your package if you proceed. Find my package →

A large share of Holloway’s terraces were divided during the twentieth century, so the first question is often not how to extend but who is entitled to. A ground-floor or garden flat extending into the rear garden needs that garden to form part of its demise — which is a title question, not a matter of who has been using it — and the lease will require the freeholder’s written consent before structure, drainage or the demised boundary is touched. That licence to alter runs on its own timetable, governed by the lease rather than by planning law, and it is entirely capable of outlasting the council’s decision.

Where the property is a house, the transforming move is opening the rear closet wing into the main room. That wall carries the wing roof and the floor above, so it means a beam sized by an engineer with padstones spreading the load into the remaining masonry. The beam depth sets the finished ceiling across the widest part of the new room, which is why it is sized before the kitchen is laid out rather than after — reversing that order is how a bulkhead ends up over the island.

Servicing is tighter on a mid-terrace than owners expect, because there is only one external face. Part F requires mechanical extract at a defined rate for a kitchen and a recirculating hood does not meet it, so the duct has to reach the rear elevation, clearing the new beam and any rooflights on the way. Where the hob sits is therefore a servicing decision before it is a design preference, and on a plan with an island it is the constraint that shapes the layout.

Underground, the runs are rarely where the deeds imply. These streets were altered repeatedly through the twentieth century and rear additions were built and rebuilt without records, so a drainage survey establishes what is actually there. Where the line is a public sewer, building over it or within three metres requires a build-over agreement with Thames Water and the foundations are deepened, offset or bridged — a known cost if found at feasibility and an overspend if found in the trench.

Local analysis

What matters in Holloway

Choosing a depth when prior approval is not available

In most of London a homeowner wanting more than the standard Class A depth uses the prior approval procedure: notify the council, the adjoining neighbours are consulted, and if none objects the work proceeds. On a designated Holloway address that route is closed, because Islington has removed permitted development rights in 40 of its 42 conservation areas. The additional depth therefore has to be justified on planning merits in a householder application, and the evidence that does the work is the street rather than the regulation. We survey the neighbouring rear building line before proposing a figure: how far the houses on either side have already extended, whether the run has a consistent depth, and where your proposal would sit against it. Matching an established line is straightforward to argue and rarely harms anyone’s daylight further. Projecting well beyond it has to be defended on daylight, outlook and the effect on the rear elevation of the terrace, and on a narrow plot with a north-facing garden it frequently should not be built at all. The practical consequence is that the depth conversation happens early, with real information, rather than being set by a rule and tested later.

Extending a ground-floor flat: three consents, three clocks

On a subdivided Holloway terrace an extension to the ground-floor or garden flat runs three separate approval tracks, and treating them as one sequence is what strands projects. The first is planning. A flat holds no householder permitted development rights at all, so an application is required whatever the designation — there is no Class A route and no prior approval to fall back on. The second is the lease. The freeholder’s licence to alter governs any work to structure, drainage or the demised boundary, is assessed by their surveyor rather than by the council, and commonly takes weeks; it also requires you to establish from the registered title that the rear garden is actually demised to your flat, which on a converted terrace is frequently assumed rather than checked. The third is the building regulations, which for a flat are stricter than for a house: altering the structure affects the dwellings above, and fire separation between flats and the protection of a shared escape route both come into scope. None of these blocks the others, but they run at different speeds and none of them waits. Starting all three at the same time, rather than waiting for planning before approaching the freeholder, is usually the difference between a season and a year.

Thinking about a project in Holloway?

Send the address and a short description. We will confirm the likely approval route and the drawings your project needs.

Book an Architectural ConsultationSee fixed-fee packagesor call 020 8054 8756

Local planning

Planning & conservation context

A single-storey rear kitchen extension ordinarily falls within Schedule 2, Part 1, Class A permitted development on an undesignated house, with the prior approval procedure available for greater depth. Both routes are closed on designated land, and with Islington covering 40 of its 42 conservation areas by Article 4 direction, most designated Holloway addresses need a householder application.

That removes the prior approval option in particular, which elsewhere is the usual way to gain meaningful additional depth. Here the depth has to be justified on its planning merits against the established rear building line rather than notified under a fixed procedure.

Flats hold no householder permitted development rights, so a converted terrace needs permission whatever the designation, and the freeholder’s consent runs alongside the council’s decision rather than following it.

Within a designated Holloway address a rear kitchen extension is assessed against the established pattern along the terrace: how deep the neighbours have gone, what proportion of the original rear elevation survives, and whether the new roof form and materials read as subordinate to the host building.

Materials carry weight. A rear extension in a designated area is generally expected to relate to the host building rather than contrast freely with it, and the detailing at the parapet, the eaves and the junction with the existing brickwork is usually what an officer comments on first.

Surveying what the neighbours have actually built is worth more here than a general policy argument, because on a uniform terrace the established rear building line is the strongest evidence available for the depth being proposed.

For the wider local-authority picture — policies, timescales and application routes — see planning in Islington.

Illustrative study — street elevation

Services

Architectural services in Holloway

Browse all London architectural services.

Nearby

Nearby Kitchen Extension Architects pages

Kitchen Extensions in Tufnell ParkKitchen Extensions in HighburyKitchen Extensions in ArchwayKitchen Extensions in IslingtonKitchen Extensions in Finsbury ParkKitchen Extensions in Canonbury

Architecture in Holloway: FAQs

Do I need planning permission for a kitchen extension in Holloway?

On a designated address, almost certainly. Islington has removed permitted development rights in 40 of its 42 conservation areas, which closes both the Class A route and the prior approval procedure. A flat needs permission whatever its designation. On the small number of undesignated Holloway addresses the ordinary routes remain available, so the mapping check is worth running before assuming either way.

How deep can I extend the back of a Holloway terrace?

Because prior approval is unavailable on designated land, the depth is argued rather than notified. The evidence that matters is the established rear building line along the terrace: matching a consistent line is straightforward, projecting well beyond it has to be justified on daylight and outlook. We survey what the neighbours have built before recommending a figure, and on a north-facing plot that figure is often shallower than owners expect.

Can I have an extractor over an island?

Yes, but it has to be designed as a servicing problem rather than a layout choice. Part F requires mechanical extract at a defined rate for a kitchen and a recirculating hood does not meet it, so a duct must reach an external face. On a mid-terrace house the rear elevation is the only option, so the route runs through the new roof or a ceiling void and must be coordinated with the structural beam and rooflights.

What if a drain runs under the proposed extension?

It is common and manageable, but it changes the foundations. Where the run is a public sewer, building over it or within three metres requires a build-over agreement with Thames Water, and the foundations are deepened, offset or bridged. A private drain serving only your property can usually be diverted. On these streets the runs are frequently not where the deeds imply, so a drainage survey at feasibility repays itself.

Should the kitchen go at the back or in the middle of the plan?

Both work and the garden decides. At the rear it gets the view and the best light but spends the brightest part of the new room on units and appliances. In the middle, where the old rear wall stood, the glazed end is freed for dining and sitting and the drainage and extract runs get shorter. On a north-facing Holloway plot the middle position is usually stronger.

Will opening up the ground floor affect fire safety?

It can, particularly where there is or will be a habitable loft. Opening the ground floor into one space removes the separation at the foot of the stair, which matters when that stair is the protected escape route from the storeys above. On a two-storey house the requirements are usually manageable through alarms and layout; on a three-storey house they are stricter. We check the whole-house fire strategy at design stage.

How long does a Holloway kitchen extension take?

Survey and design typically take several weeks. A householder application is generally targeted for determination in around eight weeks after validation, and on a designated address that application is the route rather than a fallback. Building regulations drawings and tender information follow the decision. On site, a single-storey rear extension with a full ground-floor refit is commonly three to five months.

What does a kitchen extension architect in Holloway cost?

We publish fixed-fee packages rather than quoting a percentage before seeing the house, beginning with a route review credited against the design work if you proceed. The fee covers feasibility and consent strategy, then the planning drawings, then building regulations and tender information. Structural engineering, drainage surveys, any Thames Water agreement, council fees and building control charges sit outside it.

Discuss a kitchen extension in Holloway

Send your Holloway address, photographs of the rear elevation and existing kitchen, and a note of how you want the ground floor to work. We will confirm the designation, survey the neighbouring rear building line, flag the drainage and extract questions and set out the fixed-fee stage that follows.

Book an Architectural ConsultationEstimate the feesor call 020 8054 8756
Call 020 8054 8756Send Details