Architects for Extensions & Planning Applications  in Bromley

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

All In One Architectural Solution In Bromley

Planning applications handled for Bromley — council decisions arrive in 8 weeks standard.
Green Belt and protected land affect extensions — full planning is often required.
Full design, planning, and building regulations delivered together under one fixed fee.
Loft conversions available — Velux, dormer, and hip-to-gable options all designed in-house.
In-house structural engineer included — no separate specialist needed for your calculations.
A 98% planning approval rate achieved across 44+ completed Bromley projects locally.

At Extension Architecture, we excel in innovative design and strategic planning as leading architects in Bromley. With 16 years of experience in both residential and commercial projects across the London Borough of Bromley, our expert team—including architects, project managers, interior designers, and contract administrators—has a deep understanding of local planning regulations and policies. This expertise allows us to navigate challenges with ease.

Recognized among London’s top residential architecture firms, we offer a wide array of services tailored to residential needs, from home extensions and flat conversions to new constructions and HMOs. We manage every aspect of the project, from initial design and planning to complex interior design, ensuring thorough oversight from start to finish. As one of Bromley’s premier architectural practices, we are dedicated to the design process, attuned to the local environment, and ensure precise coordination throughout each phase of the project. We serve homeowners and developers throughout Bromley this includes: BR1, BR2, BR3, BR4, BR5, BR6, BR7, SE9 (part), SE19 (small part), SE20.

We only deliver excellence

44⁺

Projects completed in Bromley

2220 ⁺

Our total projects completed in London & Surrey

Locations in Bromley

Bromley • Beckenham • Orpington • Penge • Chislehurst • Petts Wood • West Wickham • Hayes • Shortlands • Bickley • Biggin Hill • Downe • Farnborough • St Mary Cray • St Paul’s Cray • Chelsfield • Elmers End (part) • Mottingham (part)

Postcodes Served

BR1, BR2

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 Bromley Extension & Loft Conversion Projects

What makes Bromley Special?

Bromley is a highly sought-after borough in South East London, due to its attractive residential offerings and strong sense of community. Large, elegant Georgian and Victorian homes stand alongside more modern developments in their respective areas, providing a wide variety of properties that suit the tastes and needs of all different types of property owners.

Large houses and leafy environs add to Bromley’s appeal for many families and professionals who like a balance between suburban living and ease of access into central London. This can also be particularly charming because of its well-preserved conservation areas, such as the Bromley Town Centre and Sundridge Park, each focusing on the protection of the architectural heritage and greenery. These are in place to conserve the historical integrity of an area, hence preserving its character and appeal.

Edwardian and 1930s homes dominate BR1 — ideal for rear and loft projects.
Green Belt and protected land restrict development — full planning is usually required.
Strong local demand means well-designed extensions consistently add lasting property value.
Bromley Council works to a clear 8-week householder planning decision timeline.

Interior fit-out, Bromley

What Our Clients Say About
Extension Architecture

Interior fit-out, Bromley

Planning Applications and Architectural Services in Bromley

Extension Architecture had a very exciting new build project in Bromley, and I must say that this project gave a lot to reflect upon, and obviously, enriched a lot, not only our team with fresh ideas and insights into design, but also into working at Extension Architecture in general. We delivered a modern four bedroom home that met its client’s visual of a spacious and functional home. We focused on this openness and connectivity in our design with a unique void connecting the kitchen to the basement level, adding to the flow of the home’s main social spaces.

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 experienced team of Bromley architects will take the lead and create a thoughtful design that maximizes the available space and is tailored to your tastes. We will guide you through the intricacies of the planning process and discuss every aspect of the project in detail. Our architects will carefully survey your property to ensure no detail is overlooked. We will be with you throughout the process, providing clearand comprehensive instructions while walking you through the planning, application and construction process.

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 a house extension in London, our architects can guide you through the entire process from concept design to construction.

Get A Free Quote Contact Us

Double-storey rear extension with modern lighting at a property in Epsom

Years of Experience

17

Any Questions?

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

It depends on location. Green Belt and protected land across Bromley usually require a full application to London Borough of Bromley, even for small extensions. Streets outside those designations often keep Permitted Development rights. We check your address free of charge before any design begins.

Bromley properties suit single-storey rear extensions, double-storey additions, side returns, loft conversions, and wraparound extensions. The dominant stock across BR1, BR2 is Edwardian and 1930s homes, which responds well to these approaches. We advise on the right option for your home and budget free of charge.

Yes, but Green Belt rules limit how much you can add — typically a proportionate increase over the original floor area. Full planning from London Borough of Bromley is required. We assess your plot and advise on a realistic scheme free before design work begins.

London Borough of Bromley targets 8 weeks for householder applications from validation. Conservation area or more complex cases can take up to 13 weeks. Once granted, permission stays valid for 3 years. We track every application closely and respond to any council queries immediately on your behalf.

Extension Architecture has completed 44+ projects across BR1, BR2 and the wider Bromley area. We are RIBA-chartered, ARB-registered, carry an in-house structural engineer, and hold a 98% planning approval rate. We offer a free feasibility check covering planning routes, constraints, and timescales before any fee is agreed.

Architects for Extensions & Planning Applications  in Bromley