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Free 2026 London Planning Report — House Extension Drawings in Herne Hill SE24

Single-storey rear extension behind an Edwardian terrace in Herne Hill SE24, London Borough of Lambeth
Herne Hill · SE24 · Lambeth

House Extension Drawings in Herne Hill SE24

Fixed-fee, MCIAT-chartered house extension drawings for Herne Hill (SE24) homeowners — London Borough of Lambeth validation and local constraints handled from the start.

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Herne Hill (SE24) straddles the Lambeth–Southwark boundary around Brockwell Park, with its Lambeth side made up of desirable late-Victorian and Edwardian streets — including the Poets' Corner terraces off Railton Road. Rear and loft projects are the staple here, shaped by the conservation areas that cover much of the neighbourhood. (The Stradella Road conservation area lies just across the boundary in Southwark, so properties there answer to a different council.)

Lambeth's Brockwell Park and Herne Hill conservation areas closely control frontages and rooflines around the park and the Poets' Corner streets, and the low ground near the culverted River Effra brings flood-risk considerations. We check where a Herne Hill property sits relative to those designations — and which side of the borough boundary it falls — before recommending a permitted-development or full-application route.

Single-storey rear extension behind an Edwardian terrace in Herne Hill SE24, London Borough of Lambeth
Isometric illustration of a Herne Hill SE24 home house extension drawings design
Proposed floor plan
Herne Hill SE24

Planning in Herne Hill (SE24): what to know before you apply

SE24 has no householder Article 4 direction, so many Herne Hill houses retain permitted development rights for rear and loft work — but Lambeth's Brockwell Park and Herne Hill conservation areas are the exceptions, controlling frontages and rooflines around the park and the Poets' Corner streets, and low-lying parts near the old River Effra carry flood-risk considerations. SE24 straddles the Lambeth–Southwark boundary, so we confirm which council a property falls under before advising.

Typical Herne Hill housing stock

Late-Victorian and Edwardian terraces and semi-detached houses on the streets around Brockwell Park, including the well-known Poets' Corner streets off Railton Road, with mansion flats along the main roads.

Streets we regularly draw for in Herne Hill

Half Moon Lane · Norwood Road · Shakespeare Road · Railton Road

House Extension Drawings for Herne Hill (SE24) homes: the package and the process

Every house extension drawings we prepare for an Herne Hill property is drawn to London Borough of Lambeth’s validation standards and tuned to the SE24 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 Herne Hill SE24

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

House Extension Drawings in Herne Hill SE24 — 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 Lambeth?+
On many of Lambeth's Victorian and Edwardian terraces in Brixton, Clapham and Streatham, a single-storey side-return or rear extension can fall within permitted development, so a full application isn't always required. Conservation areas such as Clapham Common and Brixton Water Lane can restrict this. We check your street's designation first and can confirm permitted development with a Lawful Development Certificate.
My Lambeth home is a converted flat — does that change things?+
It often does. Many Lambeth houses are converted flats, so ownership, lease and party-wall considerations can matter as much as the planning route, and the freeholder's agreement is usually needed alongside planning. We resolve the ownership and shared-structure context before drawing so the scheme is deliverable, not just consentable.
What does Lambeth's HMO Article 4 direction affect?+
Lambeth applies an Article 4 direction removing permitted development rights for HMO conversions (C3 to C4) in designated parts of the borough, so a change of use to a house in multiple occupation needs a full application there. It doesn't affect a standard family extension, but we confirm whether it applies to your address and use before advising on a route.
How long does Lambeth Council take to decide?+
Lambeth determines most householder applications within the statutory eight-week period once validated. The terraced grids around Clapham and Brixton are party-wall-sensitive with well-established design expectations, so the commonest delay is a drawing query — we prepare submissions to the borough's residential extension guidance to keep them moving.
How much do planning drawings cost in Lambeth?+
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 Lambeth approves. A side-return, a loft and a flat-conversion scheme differ in complexity, so we quote once we understand your street and project rather than charging by the hour.
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