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Free 2026 London Planning Report — House Extension Drawings in Kingsbury NW9

Loft conversion bedroom with skylights in a Kingsbury Metro-land semi, Brent
Kingsbury · NW9 · Brent

House Extension Drawings in Kingsbury NW9

Fixed-fee, MCIAT-chartered house extension drawings for Kingsbury (NW9) homeowners — London Borough of Brent validation and local constraints handled from the start.

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Kingsbury (NW9) pairs the historic Roe Green garden village with wide streets of Metro-land semis, and the low cottage scale around the village greens makes extension massing and roof form the key design questions here.

Roe Green's conservation area carries an unusually broad Article 4 direction that also controls rear outbuildings, so we check whether a plot falls inside the designation before choosing between permitted development and a full application.

Loft conversion bedroom with skylights in a Kingsbury Metro-land semi, Brent
Isometric illustration of a Kingsbury NW9 home house extension drawings design
Proposed floor plan
Kingsbury NW9

Planning in Kingsbury (NW9): what to know before you apply

Inside Roe Green Village a full application is the norm and the Article 4 direction even restricts rear outbuildings. Elsewhere in Kingsbury many loft conversions and rear extensions stay within permitted development, subject to the usual size and neighbour tests.

Typical Kingsbury housing stock

Roe Green Village is a First World War garden village of 1918-1920, designed by Frank Baines to house aircraft workers, retaining a historic village-green character. The wider Kingsbury streets add 1920s-30s Metro-land semi-detached houses.

Streets we regularly draw for in Kingsbury

Roe Green · Bacon Lane · Hay Lane · Stag Lane

House Extension Drawings for Kingsbury (NW9) homes: the package and the process

Every house extension drawings we prepare for an Kingsbury property is drawn to London Borough of Brent’s validation standards and tuned to the NW9 constraints above. Here is what the drawing package covers and how the process runs from first survey to approval.

A well-drawn extension adds space and value while sailing through the council; a poorly-drawn one triggers objections and refusals. DrawingsDirect draws rear, side-return, wraparound, double-storey and basement extensions for London homes — sized to your borough's tolerances, with daylight and neighbour impact considered before the planners raise them.

Which extension types do you draw?

Every London extension is shaped by the plot, the neighbours and the borough's design guidance. We draw them all.

Rear extension

A single-storey rear extension is often permitted development within depth limits — ideal for an open-plan kitchen-diner.

Side-return

Fills the alley beside a Victorian terrace, widening the ground floor without losing garden.

Wraparound

Combines a rear and side-return extension for a transformative ground floor, usually needing planning permission.

Double-storey

Adds space above and below, subject to tighter scale and neighbour-impact scrutiny.

Basement

Creates space downward where footprint is limited, with structural and party-wall care.

Do I need planning permission for a house extension in London?

Single-storey rear extensions within permitted development limits (up to 6m for terraced/semi-detached homes under the larger-home scheme, subject to neighbour consultation) may not need a full application. Wraparounds, double-storeys and anything in a conservation area usually do. We assess your plot and recommend the right route before drawing.

Typical London extension drawing packages
ExtensionTypical routePackageFee from
Single-storey rearPermitted development / householderPlanning + building regs£1,100
Side-returnHouseholder planningPlanning + building regs + structural£1,600
WraparoundHouseholder planningFull package + structural£2,200
Double-storeyHouseholder planningFull package + structural£2,400

Also in Kingsbury NW9

Planning PermissionPlanning DrawingsArchitectural DrawingsBuilding Regulations DrawingsLoft Conversion DrawingsHouse Extension Drawings across BrentHouse Extension Drawings across London
FAQ

House Extension Drawings in Kingsbury NW9 — FAQs

How far can I extend without planning permission in London?+
Under permitted development, single-storey rear extensions can reach 3m (terraced/semi) or 4m (detached), or up to 6–8m under the prior-approval larger-home scheme — but conservation areas and Article 4 directions can remove these rights. We check your property first.
Do extension drawings include structural calculations?+
Our full package includes structural drawings and calculations coordinated in-house, so your builder can price and build without waiting on an engineer.
How long do extension drawings take?+
Typically about 7 days from survey to a full drawing set delivered to your online portal.
Will my rear extension need a party wall agreement?+
If you build up to or on a shared boundary, excavate near a neighbour's foundations, or cut into a party wall for a steel, the Party Wall etc. Act 1996 usually applies. Our drawings show the works clearly so a party wall surveyor — or your neighbour — can see exactly what is proposed, which keeps that process quick.
Can I extend a house in a conservation area?+
Yes, but conservation areas and Article 4 directions commonly remove permitted development for rear and side extensions, so the work needs a full householder application designed to the council's heritage guidance. We confirm your property's designation before recommending a route.
Do I need planning permission for a side-return extension in Brent?+
On the Victorian and Edwardian terraces of Kilburn, Willesden and Harlesden a single-storey side-return or rear extension can fall within permitted development, so a full application isn't always needed. Conservation areas such as Queen's Park and Mapesbury restrict this. We check your street's designation first and can confirm permitted development with a Lawful Development Certificate where it qualifies.
What does Brent's borough-wide HMO Article 4 direction affect?+
Brent applies a borough-wide Article 4 direction removing permitted development rights for change of use to an HMO (C3 to C4), so a conversion to a house in multiple occupation needs a full application anywhere in the borough. It doesn't affect a standard family extension or loft, but we confirm whether it applies to your intended use before advising.
Is a hip-to-gable loft conversion allowed on my Brent semi?+
Frequently, yes. The interwar semis of Wembley, Kingsbury and Sudbury suit hip-to-gable and dormer conversions, which often qualify as permitted development within the volume limits. We confirm eligibility against those limits and any conservation or Article 4 constraint, then produce the planning and building-regulations drawings.
How long does Brent Council take to decide?+
Brent determines most householder applications within the statutory eight-week period once validated; conservation cases can attract additional consultation. The dense terraced streets are party-wall-sensitive, so the commonest delay is a drawing query — we prepare submissions to the council's householder guidance to keep them moving.
How much do planning drawings cost in Brent?+
We agree a fixed fee before starting, usually around 30% below an architect's fee for the same council-accepted drawings, with free redraws until Brent approves. A side-return, a hip-to-gable loft and a conservation-area application differ in complexity, so we quote once we understand your street and project rather than by the hour.
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