Floor Plans in Harrow Weald HA3
Fixed-fee, MCIAT-chartered floor plans for Harrow Weald (HA3) homeowners — London Borough of Harrow validation and local constraints handled from the start.
Harrow Weald (HA3) runs from the suburban streets off Uxbridge Road up to the wooded Green Belt slopes and Harrow Weald Common on the borough's northern edge. Most householder work is on the inter-war stock — rear and side extensions and loft conversions — but the rural fringe carries much tighter controls.
Three genuine conservation areas sit here: West Drive and Bellfield Avenue (re-designated 2023), the Brookshill Drive and Grimsdyke Estate around Old Redding, and Harrow Weald Park. The Grimsdyke Estate area additionally carries an Article 4 Direction, so we check both the conservation and Green Belt boundaries before advising a route.
Planning in Harrow Weald (HA3): what to know before you apply
Suburban HA3 houses off Uxbridge Road generally keep permitted-development rights for rear and loft projects, but the Brookshill Drive and Grimsdyke Estate conservation area is under an Article 4 Direction, and Green Belt designation on the northern slopes sharply limits new floorspace. Extension design in the West Drive and Bellfield Avenue area must respect its inter-war Domestic Revival character.
Typical Harrow Weald housing stock
Two-storey inter-war Domestic Revival houses on the tree-lined West Drive and Bellfield Avenue, alongside larger detached homes and former estate buildings on the Green Belt slopes around Brookshill and Old Redding.
Streets we regularly draw for in Harrow Weald
West Drive · Bellfield Avenue · Brookshill · Old Redding · Uxbridge Road
What HA3 is actually built of
Measured from 245 classified residential buildings in HA3, not from a description of the area.
Harrow Weald HA3 housing mix
Residential building form across the HA3 postcode district, from 245 classified buildings.
| Attached on more than one side | 41% |
|---|---|
| Attached on one side | 51% |
| Detached | 9% |
| Median building footprint | 72 m² |
| Addresses per buildingAbove about 2 means flats and maisonettes dominate | 1.18 |
| Buildings classified | 245 |
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 Harrow Weald (HA3) 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 Harrow Weald HA3 — FAQs
How much do floor plans cost in London?+
How long does it take to get floor plans?+
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 for a loft conversion in Harrow?+
What does Harrow expect for a rear extension on a 1930s semi?+
Can I extend a home in Harrow on the Hill or Pinner?+
How long does Harrow Council take to decide?+
How much do planning drawings cost in Harrow?+
Get your free Harrow Weald planning assessment
Tell us your Harrow Weald (HA3) address and ambition — we'll confirm feasibility, local constraints and a fixed fee within one working day.