Hampstead Architecture and Planning

Westminster

Kitchen Extension Architects in Pimlico

We design kitchen projects for Pimlico homes — most often relocating or reworking a kitchen inside a leasehold flat, maisonette or mansion-block apartment rather than bolting a glass box onto a garden. In this stock the real questions are extract routing, drainage falls against a concrete slab, the acoustic floor over the flat below and freeholder consent, and that is where our drawings begin.

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Practice leadership

Eyal Moran, Director and Lead Architect, is an ARB-registered architect, leading design judgement, planning strategy and technical coordination across client projects.

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The short answer

Can you extend or relocate a kitchen in Pimlico?

Usually yes, but in Pimlico's flats and maisonettes it is a services-led relocation, not a garden extension. It turns on drainage falls to the stack, extract routing, an acoustic floor and fire separation over the flat below, and a Licence to Alter from the freeholder. Internal moves rarely need planning; external terminals or a rear addition on a house may.

Planning at a glance

Pimlico

Planning at a glance in Pimlico
Local planning authorityWestminster
Conservation areaPimlico Conservation Area
Article 4 directionIn effect since 31 July 2016
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)
Typical drawing package£395–£4,950 inc. VAT, fixed fee. Find my package →

A Pimlico kitchen project usually starts not with a footprint but with where the waste and the extract can honestly go. In a mansion-block flat or a maisonette the kitchen sits on a concrete or timber floor over another dwelling, and the soil and waste stack is fixed in a riser or against a party wall. Moving a sink, dishwasher or washing machine any distance means re-grading the waste run to keep a continuous fall to that stack, and a long, shallow horizontal run is where relocations quietly fail — either they will not self-clear or they demand a raised floor that eats head height. We survey the existing stack, riser and slab first, because the position and invert of that stack set the real range of positions a new kitchen layout can actually occupy, and everything else is designed around them.

Extract is the second constraint that decides the plan. A kitchen pushed away from an external wall — common when a galley is relocated into the middle of a converted terrace or a deep mansion-block flat — needs a route for cooking extract to an outside face or an existing ventilation riser, with recirculating filtration used only where a duct genuinely cannot be run. Ducting has to cross ceilings or drop into bulkheads without pulling head height below what the room can carry, and it should keep bends to a minimum so the fan can actually shift the air. Any external terminal lands on an elevation that, in a conservation area, is assessed for appearance, so we resolve the duct route and the terminal position on the drawings before the layout is fixed, not after the units are chosen.

The floor is where a reworked kitchen meets the flat below. Relocating a kitchen usually means new wet areas and appliances over a neighbour's ceiling, so the build-up has to control both impact and airborne sound and maintain the fire separation between the two dwellings. That typically means an acoustic floor layer, resilient battens or a floating screed, careful detailing around the new soil and supply connections, and reinstated fire-stopping wherever a pipe or duct passes through the compartment floor. Appliances that vibrate or drum, like a dishwasher or a washing machine, need particular attention at the point they meet the structure. In a leasehold flat this is not optional refinement; it is the difference between a lease-compliant kitchen and a running dispute with the household below.

Almost every Pimlico flat kitchen move is gated by consent from the freeholder or managing agent, not by the council. Relocating wet areas, penetrating a compartment floor, altering a riser or fixing a terminal to a shared elevation are exactly the works a lease reserves to the freeholder, and they are typically authorised through a Licence to Alter. That process wants dimensioned drawings, a method statement and often a structural or acoustic note, and it runs on its own timescale alongside any building-regulations approval, so it needs starting early rather than treating it as a formality at the end. We prepare the drawing set the freeholder's surveyor will actually assess, showing the floor build-up, the services routes and any structural openings, so the consent is granted on evidence rather than stalled by repeated requests for missing information.

For the minority of Cubitt-era stucco terraced houses, a kitchen can take a different form: a subordinate single-storey rear addition, or a reworking of the existing rear rooms into an open kitchen-dining space. Here the constraints move to the protected rear stucco elevation, the shallow central-London garden and neighbour daylight, which Westminster assesses using the established BRE tests. A modest projection with a restrained, subordinate roof — read against the rear character rather than competing with it — is more defensible than an ambitious footprint that overshadows a neighbour or over-develops a small plot. Where excavation for foundations comes within three or six metres of a neighbour's structure, or where the work builds on the line of junction, the Party Wall etc. Act 1996 runs alongside planning and is programmed early so notices do not delay the build.

The through-line for both flats and houses is coordination rather than a signature gesture. We measure the home, establish where drainage, extract and structure allow the kitchen to sit, and design a layout that respects those givens while delivering the plan, joinery, lighting and services coordination the room needs to feel generous. From there we produce the building-regulations drawings that cover structure, drainage, ventilation and fire separation, the Licence to Alter set the freeholder requires, and any planning submission an external change triggers — keeping the internal and external consents on separate tracks so neither holds up the other. On this stock the honest kitchen is the one whose services were resolved before the cabinetry was ever drawn, and that is the sequence we work to. We do not promise approval; we make the case as strong as the constraints allow.

Local analysis

What matters in Pimlico

Drainage and extract: the two constraints that set the layout

In Pimlico's flats and maisonettes the kitchen layout is decided by services long before cabinetry. The soil stack is fixed in a riser or against a party wall, so every relocated sink or appliance has to keep a continuous, workable fall back to it; push the wet area too far or too shallow and the waste run goes flat, will not self-clear and starts to block. Extract is the mirror problem — a kitchen set away from an external wall needs a duct to an outside face or a ventilation riser, run without killing head height and kept short enough on bends that the fan can still move the air, terminating on an elevation that a conservation area judges for appearance. We survey stack, riser and slab first, then place the kitchen where both drainage and extract can honestly reach, rather than fixing an attractive plan on paper and forcing the services to chase it around the flat afterwards.

The acoustic floor and fire separation over the flat below

Because most Pimlico kitchens sit over another dwelling, the floor is a compartment floor doing two jobs at once: keeping sound out of the flat below and holding the fire separation between the two homes. Relocating wet areas and appliances disturbs both, and a kitchen is the noisiest, wettest room to move. The build-up typically gains an acoustic layer, resilient battens or a floating screed to control impact and airborne noise, with vibrating appliances isolated where they meet the structure, and every point where a new soil pipe or extract duct passes through the floor has to be fire-stopped back to the compartment rating with a tested collar or sleeve. Get this wrong and the result is not just a technical failure but a dispute with the neighbour and a breach of the lease. We detail the floor, the penetrations and the fire-stopping on the drawings so that building control and the freeholder's surveyor both see one coordinated solution rather than a problem left to site.

For most Pimlico kitchen moves the decisive consent is not the council's but the freeholder's. Relocating wet areas, penetrating the compartment floor, altering a riser or fixing an external terminal to a shared elevation are works a lease reserves to the freeholder, granted through a Licence to Alter. The freeholder's surveyor typically wants dimensioned plans, a method statement and often a structural or acoustic note, and the process runs on its own clock alongside any building-regulations sign-off, so it should be opened at the start of design rather than treated as a closing formality. Starting works without it risks a breach that no planning permission can cure, and can hold up a future sale. We assemble the drawing set the surveyor will genuinely assess — layout, floor build-up, services routes and structural notes — so the licence is granted on evidence and the programme is not left hostage to repeated requests for missing information late in the day.

Thinking about a project in Pimlico?

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

Local planning

Planning & conservation context

Pimlico sits within the City of Westminster, so any externally visible change — a rear addition on one of the terraced houses, a new extract terminal on an elevation, or a flue through a roof — is assessed against Westminster's planning policies. Westminster mapping identifies a Pimlico Conservation Area covering visible stucco, windows, roof forms and frontages, so where the property falls within that designation the appearance of any external alteration matters. Whether a specific address sits inside the conservation area must be checked for that exact property before a route is assumed.

A great deal of Pimlico kitchen work is internal and needs no planning permission at all: moving a kitchen within a flat, opening one room into another and re-routing services are usually questions of building regulations and leasehold consent, not planning. Where a project does reach the elevation — a new louvre, a cowl, a condenser or a rear extension on a house — a householder or, for a flat, a full planning application may be required, and householder applications are determined in around eight weeks once validated. We separate the internal works from the external ones early so each follows the right consent.

For the minority of Cubitt-era terraced houses, a subordinate single-storey rear kitchen may be possible, but it is tested against the protected rear stucco elevation and a shallow central-London garden rather than treated as an open-ended extension. Permitted-development rights are frequently restricted on conservation-area land, so we plan for a full application rather than relying on them, and confirm the position for the exact address instead of assuming a house-scale precedent applies.

Westminster conservation overview material describes Pimlico through its mid-19th-century squares and terraces associated with Thomas Cubitt, and characterises the area as comparatively subdued with wide streets and avenues. For a kitchen project the practical consequence is that anything appearing on an elevation — an extract grille, a flue, a condenser unit or new glazing to a rear kitchen — is read against that stucco character, so external service terminals are best kept discreet and, where possible, off the principal frontage.

The same overview material notes the Pimlico Conservation Area was first designated in 1968 and extended in 1973, 1990 and 2006, with its audit adopted on 10 April 2006. These dates are attributed to Westminster conservation overview material rather than presented as a primary citation, and whether they bear on a particular home depends on whether that address falls within the designation, which should be confirmed for the exact property.

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

Illustrative study — street elevation

Architecture in Pimlico: FAQs

Do I need planning permission to move my kitchen in a Pimlico flat?

Usually not. Relocating a kitchen within a flat, opening it into another room and re-routing internal services are building-regulations and leasehold matters rather than planning ones. Planning tends to arise only where the works reach the outside — a new extract terminal, a condenser or a flue on an elevation. We separate the internal from the external works and confirm the position for your exact address.

Can I relocate the sink and appliances anywhere in the flat?

Not anywhere. Waste has to keep a fall to the soil stack, which is fixed in a riser or against a party wall, so a long, shallow horizontal run can make a position unworkable. We survey the existing stack and slab first and set the layout around where drainage can honestly reach, rather than choosing the units and hoping the waste follows.

How do I get cooking extract out if the kitchen is not on an external wall?

You route a duct to an external face or an existing ventilation riser, crossing ceilings or bulkheads without dropping head height too far, or use recirculating filtration only where a duct genuinely cannot run. Any external terminal lands on an elevation that a conservation area assesses for appearance, so we resolve the duct route and terminal position on the drawings before the layout is fixed.

Do I need freeholder consent to alter my kitchen?

Almost certainly. Relocating wet areas, penetrating the compartment floor, altering a riser or fixing a terminal to a shared elevation are works a lease typically reserves to the freeholder, authorised through a Licence to Alter. That runs on its own timescale alongside building-regulations approval, and wants dimensioned drawings and often a structural or acoustic note. We prepare the set the freeholder's surveyor will actually assess.

What is the acoustic floor and why does it matter over the flat below?

A reworked kitchen puts new wet areas and appliances over a neighbour's ceiling, so the floor build-up has to control impact and airborne sound and maintain fire separation between the two dwellings. That usually means an acoustic layer, resilient battens or a floating screed, plus reinstated fire-stopping where pipes or ducts cross the floor. In a leasehold flat this is a lease-compliance issue, not an optional upgrade.

Does the conservation area affect an internal kitchen relocation?

Rarely for the internal works themselves. Where Pimlico's conservation designation applies to an address, it bears on anything visible on an elevation — an extract grille, a flue, a condenser or new glazing — which is read against the area's stucco character. Purely internal moves usually sit outside that. Whether your address falls within the designation should be confirmed for the exact property.

Can I build a rear kitchen extension on a Pimlico house?

On the minority of Cubitt-era terraced houses a subordinate single-storey rear kitchen may be possible, but it is tested against the protected rear stucco elevation, a shallow garden and neighbour daylight rather than treated as open-ended. A modest projection with a restrained roof is more defensible than an ambitious footprint. Permitted-development rights are often restricted here, so we plan for a full application.

Will moving the kitchen trigger the Party Wall Act?

It can. Internally, cutting into a party wall for a beam or fixing structure to it can be notifiable. On a terraced house, excavating for a rear kitchen's foundations within three or six metres of a neighbour's structure, or building on the line of junction, engages the Party Wall etc. Act 1996. It is separate from planning and leasehold consent, so we identify notifiable neighbours early.

What building regulations apply to a kitchen relocation?

Building regulations cover the structure of any opening, the drainage falls to the stack, ventilation and extract, electrical safety, and — critically here — the fire separation and sound insulation to the flat below. A kitchen that moves wet areas and penetrates a compartment floor engages several of these at once, so the drawings set out the floor build-up, fire-stopping and drainage together rather than leaving them to site.

How much does a kitchen project in Pimlico cost?

Design fees depend on scope and consent route — an internal relocation with a Licence to Alter differs from a rear addition on a house needing planning. Our published packages start from a fixed fee, confirmed once the scope is clear, and exclude council fees, freeholder and surveyor charges, and specialist consultants such as structural or acoustic engineers. See the packages page for the current fixed-fee structure.

Discuss a kitchen project in Pimlico

Send us your Pimlico address and a short description of the kitchen you want to relocate, open up or extend. We will confirm whether the works are internal or reach an elevation, identify the drainage, extract, acoustic and freeholder-consent constraints, and set out the drawings and approvals your project will need.

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