Architects for Extensions & Planning Applications  in Lambeth

Planning permission, architectural design and project management  delivered end-to-end by a multi-award-winning local team.

All In One Architectural Solution In Lambeth

Planning approved by London Borough of Lambeth — 8 weeks standard decision.
Permitted Development: 3m terraced, 4m detached — PD on most streets exceptions apply.
Full design, planning, and building regulations in one fixed fee.
Loft conversions available — Velux, dormer, and hip-to-gable options.
In-house structural engineer included — no separate specialist needed.
98% planning approval rate — including PD on most streets applications.

Extension Architecture handles planning applications, house extensions, and loft conversions across Lambeth and the London Borough of Lambeth — covering SW2, SW4, SW9, SE5, SE11, SE24 and SW16. Most single-storey rear extensions qualify as Permitted Development (3m terraced / 4m detached), with conservation area restrictions applying in parts of Brixton, Clapham, and Herne Hill. Lambeth Council decisions take 8 weeks. Free quote today.

We only deliver excellence

39⁺

Projects completed in Lambeth

2220 ⁺

Our total projects completed in London & Surrey

Locations in Lambeth

Brixton • Clapham • Streatham • Streatham Hill • Streatham Common • West Norwood • Tulse Hill • Herne Hill (part) • Kennington (part) • Vauxhall • Stockwell • Oval • Waterloo (part) • South Lambeth • Gipsy Hill (part)

Postcodes Served

SW2, SW4, SW8, SW9, SW12, SW16, SE1, SE5, SE11, SE19, SE21, SE24, SE2

Our Expertise

Planning Application Drawings
Council-ready drawings, fast

3D Visualisations
See it before building

Retrospective Planning
Fix unpermitted works

Building Regulation Drawings
Safe, compliant drawings

Commercial Development Consultancy
Change of use experts

Interior Design
Finishes inside out

Spatial Planning & Layout
Smarter room layouts

Feasibility Consultancy
Know what’s possible

Recent Architects Lambeth Extension & Loft Conversion Projects

What makes Lambeth Special?

Lambeth, a district in South London, features a variety of architectural styles reflecting its rich history and urban development. Lambeth is home to several Georgian and Regency-style terraced houses, particularly in areas like Kennington and Stockwell.

These homes feature symmetrical facades, sash windows, and fanlights above doorways, with brickwork often painted in pastel colors. Lambeth is known for its many social housing developments, particularly large estates built in the mid-20th century. These often feature low-rise apartment blocks, green spaces, and pedestrian pathways. The Victorian era introduced ornate detailing in red and yellow brick houses, which can be seen in neighborhoods such as Vauxhall and Brixton. These homes often feature decorative stone lintels, bay windows, and wrought-iron balconies.

Varied housing stock in Lambeth — Victorian, Edwardian, and 1930s properties.
PD on most streets affects some properties — always verify your address first.
Strong property values — well-designed extensions consistently add value.
London Borough of Lambeth operates clear planning policies and 8-week decision timelines.

What Our Clients Say About
Extension Architecture

Interior fit-out, Lambeth

The Complete Package for your Lambeth Architects

Using our architectural expertise in Lambeth, we serve developers and homeowners in the whole borough, from the residential charm of Dulwich to the upscale appeal of Herne Hill. Explore our bespoke architectural solutions, carefully crafted to enhance living environments and advance developments in these vibrant and diverse communities. With our unmatched experience in Lambeth, Elevate your vision.

For quick approval of permitted development projects, say goodbye to delays and embrace a simplified procedure. Unlock the keys to an 8-week transformation by grabbing your copy today. Your dream home is closer than you think. The areas we cover in Lambeth are SW4, SE21, SE24,SW9, SW12, SE27, SE19, SE27,, SW9, SW2, SW4, SE5, SW8, SE19, SE27, SW16, SE1, SE11.

Get A Free Quote Today Call Us

Explore before & after visuals of our extension builder projects

See Portfolio

Before

After

Why choose Extension Architecture?

Our Lambeth Architects will lead and create a design that maximizes space and suits your tastes. We guide you through planning, discussing every project detail. Our architects survey your property to ensure no detail is missed. We'll support you throughout, providing clear instructions during planning, application, and construction.

One Stop Solution

Our firm provides a comprehensive range of services under one roof, from planning and architectural design to intricate interior and immersive design, and expertly manages the complexities of the construction process. We have delivered projects of various scales and budgets, from small home extensions to large new builds, for a diverse clientele.

In House Structural Engineer

Our in-house structural engineer—an advantage that only 1 in 20 firms can offer. This is crucial, as significant time is often lost consulting multiple specialists, which can lead to additional costs. With a structural engineer on our team, we ensure a fully collaborative and seamless design-build process, minimizing contingencies and preventing design inaccuracies.

Interior Design & Architecture

Our team includes interior designers who work closely with the clients, especially the ‘ladies’ of the house to curate the dream spaces tailored to their requirements. These processes include fun yet crucial processes like selecting wall finishes, color schemes, soft furnishings, flooring. Having architects and interior designers under one roof allows for less contingencies.

Turn-Key Approach

We provide support throughout the entire building process, embracing a ‘turnkey approach’ to ensure a smooth and efficient project from start to finish. Additionally, we assist in reducing build costs by aiding in the procurement of all internal fit-outs, including sanitaryware, kitchens, and more. It’s a zero hassle solution for clients.

Start Planning an Extension Home Today

If you are planning an extension in London, our architects can guide you through the entire process from concept design to construction.

Get A Free Quote Today Contact Us

Years of Experience

17

Any Questions?

Didn’t find your answer? Feel free to reach out

Most rear extensions in Lambeth (SW2, SW4) qualify as Permitted Development — up to 3m terraced, 4m detached. PD on most streets properties require full planning from London Borough of Lambeth. Decisions take 8 weeks. We check your PD eligibility free before any design work begins.

Lambeth properties suit single-storey rear extensions, loft conversions, side extensions, and double-storey additions. We assess your property type and plot, confirm PD eligibility, and advise on the most effective approach free of charge before any design fee.

London Borough of Lambeth targets 8 weeks for standard householder applications. PD on most streets cases may take 13 weeks. Pre-application advice reduces the risk of revisions. Permission is valid for 3 years from the date of decision. We track every application throughout.

Lambeth properties suit rear dormers, Velux rooflights, and hip-to-gable conversions. PD on most streets properties require planning for all loft types. Building Regulations Parts B, K, and L apply regardless of planning status. We advise on the right type at no charge.

Extension Architecture has extensive experience with London Borough of Lambeth — including PD on most streets applications across SW2, SW4. RIBA-chartered, ARB-registered, in-house structural engineer, 98% planning approval rate. Free feasibility assessment for every Lambeth enquiry before any design fee.

Architects for Extensions & Planning Applications  in Lambeth