Floor Plans in Whetstone N20
Fixed-fee, MCIAT-chartered floor plans for Whetstone (N20) homeowners — London Borough of Barnet validation and local constraints handled from the start.
Whetstone (N20) grew up along the Great North Road (the A1000) as a ribbon settlement, then filled out into a proper suburb once the Northern line reached Totteridge & Whetstone in the early twentieth century. The result is a genuinely mixed stock — Victorian and Edwardian houses fronting the old main road, and consistent interwar semi-detached homes on the streets behind — so a householder project has to respond to the particular character of its own street.
There is no conservation area covering Whetstone — that is a genuine, verified fact, not an omission. Its planning character is shaped instead by that arterial-suburb typology and by Barnet's householder design expectations, which favour keeping original building lines, bay-window frontages, materials and roof forms intact. We treat the character of your specific road, rather than a conservation designation, as the reference point when we design an extension.
Most of the work here is rear extensions, side infills and loft conversions on the interwar semis lining streets like Woodside Avenue, Buckingham Avenue and Oakleigh Park North. We check each property's permitted-development position against Barnet's borough-wide controls first, then prepare drawings that either stay within permitted development or are ready to validate as a full householder application.
Planning in Whetstone (N20): what to know before you apply
Because Whetstone mixes Victorian frontages with interwar semis, Barnet assess extensions against the character of the individual street, so matching brick, render, bay detailing and roof form matters. There is no conservation area and no local Article 4 direction, so many houses retain permitted development rights for rear and loft work — but shared building lines on the semis and the compact side-street plots mean depth, height and neighbour impact are the points a householder application turns on.
Typical Whetstone housing stock
Victorian and Edwardian houses front the old Great North Road, while interwar semi-detached and terraced homes fill the residential side streets behind. That split typology — older two-storey frontages on the arterial road and consistent 1920s–1930s semis on the estate roads — is what shapes most rear-extension and loft-conversion work here.
Streets we regularly draw for in Whetstone
Greenway · Southway · Swan Lane · Woodside Avenue · Friern Mount Drive · Maxfield Close · Buckingham Avenue · Langton Avenue · Well Grove · Oakleigh Gardens · Oakleigh Park North · Oxford Gardens
What N20 is actually built of
Measured from 391 classified residential buildings in N20, not from a description of the area.
Whetstone N20 housing mix
Residential building form across the N20 postcode district, from 391 classified buildings.
| Attached on more than one side | 23% |
|---|---|
| Attached on one side | 54% |
| Detached | 24% |
| Median building footprint | 93 m² |
| Addresses per buildingAbove about 2 means flats and maisonettes dominate | 1.42 |
| Buildings classified | 391 |
Source: Ordnance Survey National Geographic Database (derived statistics). Contains OS data © Crown copyright and database right 2026. Contains Royal Mail data © Royal Mail copyright and database right 2026. Extracted 2026-08-17.
Floor Plans for Whetstone (N20) homes: the package and the process
A floor plan is only as good as the survey behind it. Room dimensions taken from a laser survey rather than an estate agent's sketch, wall thicknesses drawn as they actually are, and structural walls distinguished from partitions — those are what make a plan usable for design work rather than just for marketing.
We issue plans at a stated scale with a scale bar, so they stay measurable when printed or resized, and supply them in formats that work for the next stage: a PDF to share, and CAD where an architect, engineer or kitchen designer needs to draw on top of it.
The plan itself carries the building's history. Chimney breasts, blocked openings, changes in floor level and an outrigger that has been extended more than once all show up in a measured plan, and they are precisely the things a sketched plan leaves out.
What are floor plans used for?
Floor plans serve several distinct purposes in London property: estate agents use them to market a sale or letting alongside photographs, giving buyers and tenants an accurate sense of layout and scale that a floor plan on its own can convey better than photos; solicitors and lenders often require a lease plan showing the demise of a flat within a building, particularly for leasehold sales or re-mortgages; landlords use them to document a property's layout for reference, insurance or portfolio management; and homeowners use them simply to have an accurate record of their existing layout, whether for their own reference or as the first step before considering any building work.
How accurate are laser-measured floor plans?
We measure every floor plan on site using a laser distance meter rather than a tape measure or estimation from photographs, which keeps room dimensions, wall thicknesses and door and window positions accurate to within a few millimetres. This matters more than it might seem: an estate agent's marketing plan that overstates a room's size can mislead a buyer and cause problems at survey stage, while a lease plan used for legal purposes needs to accurately reflect what a leaseholder actually owns. A laser-measured plan also means that if you later want to use it as the existing-layout drawing for a planning application, it is already accurate enough to build proposed drawings on top of, rather than needing to be re-measured.
How much do floor plans cost in London?
A single floor-plan set starts from £450, which covers a laser-measured site visit and scaled, dimensioned drawings of each floor of the property. The exact fee depends on the number of floors, the overall size of the property, and whether you need elevations or a site plan in addition to the floor plans themselves — for example, for a lease plan or as the base for a future planning application. This is a fixed fee agreed upfront, with no hourly billing.
| Floor plans | Full planning drawing set | |
|---|---|---|
| Purpose | Record of existing layout | Existing layout plus a designed proposal |
| Includes a proposed design | No | Yes |
| Submitted to the council | No | Yes, via the Planning Portal |
| Typical turnaround | A few days | Around 7 days from survey |
| Fee guide | From £450 | From £1,600 |
Floor Plans in Whetstone N20 — FAQs
How much do floor plans cost in London?+
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Can floor plans be used for a lease or mortgage application?+
Can I reuse my floor plans if I later want to extend or convert my loft?+
Do you provide floor plans for estate agents?+
Do I need planning permission to extend a house in Whetstone?+
Is Whetstone in a conservation area?+
How much do planning and building-regulation drawings cost for a Whetstone extension?+
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