A kitchen project in Paddington splits into two quite different jobs, and the first task is working out which one you have. The honest picture of the area is flat-led — stucco period terraces largely converted to flats, purpose-built mansion blocks, and newer managed apartments around the canal basin — so for most addresses a kitchen extension is not an outward build at all but a kitchen moved within the existing demise. On the minority of terraces that survive as single-family houses with a rear return or a garden, a modest rear addition is possible. Because the two cases are governed by completely different constraints — lease terms, risers and drainage on one hand, footprint, party wall and rear-elevation impact on the other — we establish the building type and tenure before drawing anything, rather than assuming a suburban side-return that this stock rarely supports.
For a flat, the kitchen's position is dictated by where waste water can actually go. A sink, dishwasher and washing machine each need a run to the building's soil or waste stack at a workable fall, usually within a riser that is shared and often outside your demise. Moving a kitchen to the other side of a flat can mean a long horizontal run under a raised floor, or a pumped waste system where gravity falls cannot be achieved — each with maintenance and acoustic consequences you should understand before committing. We map the existing stack, riser and incoming services first, then set the kitchen where the drainage can be made to work, because it is the drainage, not the joinery layout, that decides whether a relocation is feasible at all, and it is the detail a managing agent scrutinises first. A mansion-block riser may be cast iron and decades old, so a new connection is a chance to check its condition, and any change to a shared stack is exactly the kind of work the freeholder will want to review before it is agreed.
In a flat there is almost always another home directly below, and a relocated kitchen brings water and machinery over it. Building regulations cover drainage and, through Approved Document E, the separating floor's resistance to impact and airborne sound, so a new kitchen over a neighbour usually needs an upgraded acoustic floor build-up rather than tiles laid on the existing structure. Wet areas want a tanked, waterproof substrate to protect the demise below from a slow leak, and appliance and pipe penetrations through the separating floor have to be detailed and fire-stopped. These are precisely the details a managing agent and the flat below will scrutinise, so we design the floor make-up and waterproofing at the outset and record them clearly for the Licence to Alter and for building control, rather than leaving them to be resolved on site.
Almost every flat kitchen here is a leasehold alteration, which means a second approval running parallel to any building-control sign-off: the freeholder's Licence to Alter, administered through the managing agent. The lease typically requires consent for altering services, moving or forming walls, and any work affecting the structure or the flats around you, and the licence sets conditions on hours, access, insurance and making good. Where the kitchen move involves taking down a wall between the demise and a hall, that wall may be structural and may sit on the party structure with the flat next door, bringing the Party Wall etc. Act 1996 into play between flats rather than between houses. We prepare the drawings the freeholder's surveyor needs and coordinate the licence so it does not stall the build programme.
On the minority of Paddington terraces still in single-family use, a rear kitchen extension behaves more conventionally — but only up to a point. The stucco terraces sit in a dense central setting, so a rear addition is judged on its projection, its effect on neighbour daylight assessed through the established BRE tests, and its relationship to the rear elevation where the address falls within a conservation area. Building close to the boundary brings the Party Wall etc. Act 1996 into play, and near the canal basin drainage and any flood or groundwater considerations should be checked for the exact address rather than assumed. Westminster is the planning authority for Paddington, though Paddington Green is a separate designation and nearby Bayswater or Westbourne contexts can also apply, so we confirm the designation before fixing any rear scheme.
Ventilation is the constraint owners most often forget. A kitchen needs mechanical extract, and in a flat or mansion block the real question is where that extract can terminate: ducting to an external wall or an approved route is straightforward on some buildings and effectively impossible on others, where recirculating filtration becomes the only option the freeholder will permit. Overheating, make-up air and the acoustic impact of a fan on neighbours all feed into the same decision. From there the route is coordinated — we survey the flat or house, confirm drainage, structure and services, agree the design against the lease or planning position, then produce the Licence to Alter or planning drawings and the building regulations package for construction. We do not promise approval; we make the technical case that gives the scheme its best chance. On a canal-side or newer managed building the mechanical strategy is often already constrained by the developer's original ventilation design, so we work with the existing provision rather than cutting new penetrations the freeholder will refuse.
