New-build and postwar houses on a regenerated Kidbrooke SE3 street in the Royal Borough of Greenwich suited to a rear extension

Kidbrooke · SE3 · Greenwich

Rear Extension Drawings in Kidbrooke SE3

Fixed-fee, MCIAT-chartered rear extension drawings for Kidbrooke (SE3) homeowners — Royal Borough of Greenwich validation and local constraints handled from the start.

Kidbrooke (SE3) is a district defined by change: the system-built Ferrier Estate has been cleared and rebuilt as Kidbrooke Village, one of the largest housing regeneration schemes in south-east London, ringed by surviving interwar and postwar suburban housing. Householder extension and loft work concentrates on those older semi-detached and terraced houses on the fringes, where drawings have to respond to a genuinely mixed streetscape.

There is no conservation area covering Kidbrooke — that is a genuine, verified fact, not an omission. Its planning character is instead shaped by the scale of the ongoing regeneration and by the varied older housing around it, read against the Royal Borough of Greenwich's householder design expectations. We treat the immediate context of each house, rather than a conservation designation, as the reference point when we design an extension.

Across streets like Westbrook Road, Dursley Road and Whetstone Road, demand is steady for rear extensions, side infills and loft conversions on the interwar and postwar houses. We check each property's permitted-development position against Greenwich's borough-wide controls — and, on newer Kidbrooke Village homes, any developer conditions or covenants — before preparing drawings that either stay within permitted development or are ready to validate as a full householder application.

Proposed floor plan

Kidbrooke SE3

Kidbrooke (SE3) — planning at a glance

Council: Royal Borough of Greenwich
Postcode district: SE3
Planning portal: View the Greenwich planning portal
Housing stock: A rapidly changing mix of new-build Kidbrooke Village apartments and houses alongside surviving interwar and postwar semi-detached and terraced homes on the fringes. The suburban houses around the regeneration area are where most householder extension and loft work happens.
Article 4: No area-specific Article 4 direction is published for Kidbrooke; the Royal Borough of Greenwich's borough-wide permitted-development controls and householder design guidance still apply.
Sample streets: Blackheath Park · Charlton Park Lane · Morden Road · Sweyn Place · Paddock Close · The Lane · The Hall · Liskeard Gardens · Westbrook Road · St Germans Place · Dursley Road · Whetstone Road
Local constraints: A mixed and changing streetscape: new-build Kidbrooke Village blocks sit alongside older interwar and postwar houses, so extension design is judged against the immediate house and its neighbours rather than a single uniform patternGreenwich's borough-wide permitted-development limits and householder design guidance govern extension depth, height and coverage — no local Article 4 direction narrows those rights in KidbrookeMatching original brick, render and roof materials on the surviving interwar and postwar houses so a rear or side addition reads as part of the original homeNew-build Kidbrooke Village homes may carry estate management or planning conditions and restrictive covenants from the developer that can limit alterations independently of the council's permitted-development position — these need checking title by titlePostwar and interwar plots vary in depth, which constrains how far a single-storey rear extension can go before it needs a full householder applicationSemi-detached and terraced forms share building lines and boundaries with neighbours, making party-wall relationships, overlooking and overshadowing relevant to what gets approved

Planning in Kidbrooke (SE3): what to know before you apply

Greenwich assesses Kidbrooke extensions against the immediate context, which varies from new-build village blocks to older interwar and postwar houses, so the design has to respond to each house rather than a single estate pattern. There is no conservation area and no local Article 4 direction, so many older houses retain permitted development rights for rear and loft work — but on newer homes, developer conditions and covenants can restrict alterations, and neighbour amenity and building lines remain the points a householder application is judged on.

Typical Kidbrooke housing stock

A rapidly changing mix of new-build Kidbrooke Village apartments and houses alongside surviving interwar and postwar semi-detached and terraced homes on the fringes. The suburban houses around the regeneration area are where most householder extension and loft work happens.

Streets we regularly draw for in Kidbrooke

Blackheath Park · Charlton Park Lane · Morden Road · Sweyn Place · Paddock Close · The Lane · The Hall · Liskeard Gardens · Westbrook Road · St Germans Place · Dursley Road · Whetstone Road

What SE3 is actually built of

Measured from 411 classified residential buildings in SE3, not from a description of the area.

Kidbrooke SE3 housing mix

Residential building form across the SE3 postcode district, from 411 classified buildings.

Attached on more than one side	43%
Attached on one side	41%
Detached	16%
Median building footprint	67 m²
Addresses per buildingAbove about 2 means flats and maisonettes dominate	2.2
Buildings classified	411

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.

Rear Extension Drawings for Kidbrooke (SE3) homes: the package and the process

Depth is the number the application turns on, and it has to be measured from the original rear wall of the house rather than from whatever is there now. The drawings carry that dimension, the eaves and ridge heights, the position of any rooflight, and the boundary distances on both sides.

Where the scheme goes beyond the standard allowance and relies on the larger home extension route, the drawings serve a second purpose: they are what the council sends to the neighbours during the consultation. A clear, dimensioned proposed elevation answers the objection about overshadowing before it is made.

Depth is limited by the plot as much as by the rules. A long garden behind a terrace can take the full allowance, while a short one runs out before the rules do — and on a semi or detached house the same depth reads very differently from the boundary.

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

Many single-storey rear extensions qualify as permitted development, meaning no planning application is needed, provided depth, height and materials stay within set limits. That changes if your property sits in a conservation area or is subject to an Article 4 direction, both of which can remove permitted development rights across a street or borough — in that case a full householder planning application is required regardless of size.

Even where an extension qualifies, most homeowners obtain a Lawful Development Certificate to confirm that status in writing before building — useful for mortgage lenders, buyers and Building Control. We check your property against your borough's constraints before recommending a route.

How deep can a single-storey rear extension go?

Depth is the main constraint on a rear extension, and it depends on your house type and whether you use standard permitted development or the larger home extension scheme.

Permitted development

Standard permitted development allows a single-storey rear extension up to 3 metres deep for terraced and semi-detached houses, or 4 metres for detached houses, generally with eaves height limited to match or stay close to the existing house.

Larger home extension scheme

The prior-approval scheme extends this to 6 metres for terraced and semi-detached houses and 8 metres for detached houses. Your council writes to affected neighbours; if none object within the notification period, approval follows without a full planning application. If an objection is raised, the council assesses the impact on neighbouring light and outlook itself, rather than automatically refusing, so a well-considered design still has a good chance of approval.

Designing the kitchen-diner: rooflights, bi-folds and daylight

Most rear extensions exist to create one open-plan kitchen, dining and living space, so the drawing work focuses on getting light and flow right within the depth you are allowed.

Structural opening sized for bi-fold or sliding doors across most of the rear elevation
Rooflights or a roof lantern positioned to light the centre of the room, away from the shadow line of the main house
Open-plan layout tested against the 45-degree rule, which protects daylight to your neighbours' windows and can limit how close a flank wall or roof comes to the boundary
Floor build-up and threshold detail coordinated so the new floor meets the existing one without a step

Rear extension routes at a glance
Route	When it applies	Typical fee
Permitted development (Lawful Development Certificate)	Depth within 3m (terraced/semi) or 4m (detached), height and materials within PD limits	PD/LDC pack ~£950–£1,450
Larger home extension (prior approval)	Depth up to 6m (terraced/semi) or 8m (detached), with neighbour notification	from £1,100
Full householder planning permission	Extension exceeds PD/larger-home limits, or the property is in a conservation area with an Article 4 direction	Full Planning pack ~£1,600–£2,400
Planning + Building Regulations (structural)	Combined planning and construction-ready pack with structural calculations for the opening and roof	Planning + Building Regs pack ~£2,200–£3,850

Sheet from a rear extension drawings package drawn for a Kidbrooke property in SE3, showing the existing and proposed arrangement at scale — A sheet from the rear extension drawings package we submit to Royal Borough of Greenwich for Kidbrooke (SE3) properties.

Also in Kidbrooke SE3

Planning Permission Planning Drawings Architectural Drawings Building Regulations Drawings Loft Conversion Drawings Rear Extension Drawings across Greenwich Rear Extension Drawings across London

FAQ

Rear Extension Drawings in Kidbrooke SE3 — FAQs

How much does a rear extension cost to design in London?+

Rear extension drawings start from £1,100, with the final fee set by the route your extension takes — permitted development, prior approval or full planning — and whether you need building regulations and structural calculations bundled in. The fee is fixed and agreed upfront.

Do I need an architect for a rear extension?+

No. DrawingsDirect is an MCIAT-chartered architectural technologist practice, producing the same council-accepted drawings as an architect for a fixed fee typically around 30% lower.

How long does it take to get rear extension drawings?+

Drawings are typically ready around 7 days from survey. Once submitted, councils have a statutory 8-week period to determine a standard householder planning application.

What is the 45-degree rule?+

It is a daylight test many London councils apply to check that a rear extension does not block too much light to a neighbour's nearest window, measured as a line drawn at 45 degrees from that window. We check it before submission, not after a refusal.

Will I need a Party Wall Agreement for a rear extension?+

Only if your foundations or new walls sit on or near the boundary with a neighbouring property. A straightforward rear extension set within your own plot often does not trigger the Party Wall etc. Act 1996, unlike a Side Return or Wraparound extension, which usually does.

Do I need planning permission to extend a house in Kidbrooke?+

Not always. Many of the interwar and postwar houses around Kidbrooke retain permitted development rights, so a single-storey rear extension or a rear loft conversion can often proceed without a full planning application. On newer Kidbrooke Village homes there may also be developer conditions or covenants to check, so we review your property's position against Greenwich's controls first and prepare a full householder application where the project goes beyond permitted development.

Is Kidbrooke in a conservation area?+

No. There is no conservation area covering Kidbrooke. Its planning character is shaped instead by the large-scale Kidbrooke Village regeneration and the varied interwar and postwar housing around it, together with the Royal Borough of Greenwich's householder design expectations, which focus on how an extension sits against its immediate neighbours.

How much do planning and building-regulation drawings cost for a Kidbrooke extension?+

We work to fixed fees agreed before we start, with a typical turnaround of around seven days for a standard rear extension or loft on a Kidbrooke house. As a chartered architectural technologist practice we produce the same council-accepted planning and building-regulation drawings as an architect, usually for a lower fee, and include free redraws until your application is approved.

How long does the Royal Borough of Greenwich take to decide?+

Greenwich determines most householder applications within the statutory eight-week period once validated; World Heritage Site, conservation and protected-view cases can involve additional consultation. We prepare submissions to the council's validation checklist to avoid the drawing queries that cause most delays.

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