Kitchen extension to a 1930s semi-detached house in Kenton HA3, building regulations drawings for Harrow Council

Kenton · HA3 · Harrow

Planning Drawings in Kenton HA3

Fixed-fee, MCIAT-chartered planning drawings for Kenton (HA3) homeowners — London Borough of Harrow validation and local constraints handled from the start.

Kenton (HA3) is a 1930s semi-detached suburb straddling the Harrow–Brent border, where the everyday project is a rear kitchen extension, a hip-to-gable or L-shaped dormer loft, or a two-storey side extension that adds a bedroom while keeping the interwar frontage in proportion.

Around the Mount Stewart and Northwick Circle conservation areas we take extra care with roof form, materials and the building line, and we always confirm whether an address falls to Harrow Council so the application is validated first time.

Proposed floor plan

Kenton HA3

Kenton (HA3) — planning at a glance

Council: London Borough of Harrow
Postcode district: HA3
Planning portal: View the Harrow planning portal
Housing stock: Interwar semi-detached and short terraced houses laid out as a 1930s suburb straddling the Harrow and Brent border, typically with bay windows, hipped roofs and off-street parking. Plots are regular with modest-to-generous rear gardens well suited to single-storey additions.
Article 4: London Borough of Harrow does not publish its Article 4 directions to the national planning register, so permitted development rights in Kenton (HA3) can’t be confirmed from open data alone — we check the direction schedule with the council before recommending a route, as part of the fixed fee. Interwar suburban character straddling the Harrow/Brent boundary — consistent semi-detached frontages guide the scale of additions.
Conservation: Mount StewartNorthwick Circle
Sample streets: The Ridgeway · Draycott Avenue · Windermere Avenue · Northwick Circle
Local constraints: The Mount Stewart and Northwick Circle conservation areas protect pockets of planned interwar layout and consistent frontagesSemi-detached pairs mean party-wall and roofline matching are key considerations for side and loft extensionsNeighbour amenity and rear-garden depth govern how far single-storey extensions can projectThe Harrow/Brent borough boundary runs nearby, so confirming the correct planning authority for each address matters

Planning in Kenton (HA3): what to know before you apply

No published householder Article 4 direction, though the Mount Stewart and Northwick Circle conservation areas curb some permitted-development rights; the main watch-points are matching the semi-detached roofline and confirming the correct authority near the Harrow/Brent boundary.

Typical Kenton housing stock

Interwar semi-detached and short terraced houses laid out as a 1930s suburb straddling the Harrow and Brent border, typically with bay windows, hipped roofs and off-street parking. Plots are regular with modest-to-generous rear gardens well suited to single-storey additions.

Streets we regularly draw for in Kenton

The Ridgeway · Draycott Avenue · Windermere Avenue · Northwick Circle

Planning Drawings for Kenton (HA3) homes: the package and the process

Every planning drawings we prepare for an Kenton property is drawn to London Borough of Harrow’s validation standards and tuned to the HA3 constraints above. Here is what the drawing package covers and how the process runs from first survey to approval.

Planning drawings are the scale drawings a London council uses to judge your application: existing and proposed floor plans, elevations, sections and site plans that show the design, scale and neighbour impact of your project. DrawingsDirect produces complete, validation-ready planning drawing sets for extensions, lofts and conversions across London.

What is included in a planning drawing set?

A council will only validate an application that contains the right drawings at the right scale. Our standard planning set covers everything a London validation team expects.

Site location plan (1:1250) and block plan (1:500)
Existing floor plans, elevations and sections
Proposed floor plans, elevations and sections
Roof plans where relevant, with heights and materials annotated
A design and access or heritage statement where the borough requires one

How are planning drawings different from building regulations drawings?

Planning drawings show what the building will look like and how it sits in its context. Building regulations drawings show how it will be built safely — structure, insulation, fire escape and drainage. Most projects need both; our Complete package covers the two together with structural calculations coordinated in-house.

What a London planning drawing set contains
Drawing	Typical scale	What it shows
Site location plan	1:1250	The property in its street context, site edged red
Block plan	1:500	The building's footprint and position in the plot
Floor plans (existing & proposed)	1:100 / 1:50	Room layout, walls, openings and the proposed changes
Elevations (existing & proposed)	1:100 / 1:50	Each face of the building and how it changes
Sections	1:100 / 1:50	A cut through showing heights, levels and roof form

Also in Kenton HA3

Planning Permission Architectural Drawings Building Regulations Drawings Loft Conversion Drawings House Extension Drawings Planning Drawings across Harrow Planning Drawings across London

FAQ

Planning Drawings in Kenton HA3 — FAQs

What scale should London planning drawings be?+

Site location plans are 1:1250, block plans 1:500, and floor plans, elevations and sections are typically 1:100 or 1:50. We format every drawing to your specific borough's requirements.

Do I need an architect to produce planning drawings?+

No. MCIAT-chartered architectural technologists produce the same council-accepted planning drawings with the same professional accountability, and councils assess the drawings, not the author's job title.

How many revisions are included in the fee?+

All of them. The fee is fixed and we redraw free until your council approves — revisions requested by a planning officer never cost you extra.

Can you draw from my existing plans?+

We can work from existing measured drawings, but for accuracy we usually carry out a laser survey so the proposed set matches your property exactly.

Do planning drawings guarantee approval?+

No drawing can guarantee a decision, but drawing to the local plan and validation checklist maximises your odds — and we redraw free until approval.

Do I need planning permission for a loft conversion in Harrow?+

Harrow's Metro-land semis and detached houses in Rayners Lane, Kenton and Stanmore suit hip-to-gable and dormer lofts, which frequently qualify as permitted development within the volume limits. The exceptions are the conservation areas — Harrow on the Hill and Pinner's historic core — and the Article 4 wards. We check your address and can confirm permitted development with a Lawful Development Certificate.

What does Harrow expect for a rear extension on a 1930s semi?+

The council pays close attention to preserving the rhythm and building line of its interwar suburban streets, so extensions are expected to respect the established line and roof form. Many single-storey rear extensions still fall within permitted development; where a full application is needed, we design to the borough's residential guidance so it validates and approves without repeated revisions.

Can I extend a home in Harrow on the Hill or Pinner?+

Yes, but these historic conservation areas carry a heritage setting and long views the council protects closely, so permitted development is often restricted and a full, context-led application is required. We design to the character of the area — materials, proportions and rooflines — and evidence the heritage considerations so the submission stands up.

How long does Harrow Council take to decide?+

Harrow determines most householder applications within the statutory eight-week period once validated. The commonest delay is a validation query, so we prepare Harrow submissions to the council's checklist with correctly scaled existing and proposed drawings and a location plan to keep the application on track.

How much do planning drawings cost in Harrow?+

We work to a fixed fee agreed upfront, usually around 30% below an architect's charge for the same council-accepted drawings, with free redraws until Harrow approves. The figure depends on the scheme — a dormer loft differs from a double-storey extension — so we confirm it once we understand your project rather than billing by the hour.

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