Architects for Extensions & Planning Applications  in Bexley

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

All In One Architectural Solution In Bexley

Planning applications handled for Bexley - council decisions arrive in 8 weeks standard.
PD rights: 3m/4m with no application, up to 6m/8m with Prior Approval - most Bexley streets qualify either way.
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 45+ completed Bexley projects locally.

Extension Architecture handles planning applications, house extensions, and loft conversions across Bexley and the wider Bexley area, including DA5, DA6, DA7. Most single-storey rear extensions qualify as Permitted Development — 3m terraced, 4m detached. Our in-house structural engineer and RIBA-chartered team manage every stage, from survey to completion. Council decisions take 8 weeks. Get your free quote today.

We only deliver excellence

45⁺

Projects completed in Bexley

2220 ⁺

Our total projects completed in London & Surrey

Locations in Bexley

Bexley • Bexleyheath • Crayford • Erith • Slade Green • Barnehurst • Welling • Sidcup • Albany Park • Blackfen • Longlands • Northumberland Heath • Thamesmead (part)

Postcodes Served

DA5, DA6, DA7, DA1, DA8, DA14, DA15, DA16, DA18

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 in Bexley Extension & Loft Conversion Projects

What Makes Bexley Special?

Located in Greater London, Bexley is a beautiful region that has everything one may expect from a quiet suburban area without being too far away from the centre. Bexley is a rich diverse town with a population of 246,472, and even alone can fill the O2 arena more than 12 times. The principal distinctive feature of Bexley is its highly developed community focus in which families find it easy to prosper. There are dependent children living in 34% of the area’s households, a higher proportion than exists across London or England and Wales as a whole.

The town of Bexley is ideal for young families, as evidenced by the fact that the composition of the population is skewed towards youth, with 21% of the inhabitants being below the age of 16. Borough has many historic buildings, including the 12th-century Lesnes Abbey and the 16th-century Hall Place, a manor house with gardens made of stone and brick. The area is blessed with leisure facilities ranging from golfing facilities and parks, the theatrical services, and cinemas.

As architects in Bexley we are well diverse from its planning policies, we know the character of the town and its planning guidelines. We have a vision to make your project not only beneficial to you but also for it to help make Bexley an even better place to live.

1930s semis dominate DA5 — ideal for rear and loft projects.
Most streets retain PD rights, making many extensions straightforward to deliver.
Strong local demand means well-designed extensions consistently add lasting property value.
Bexley Council works to a clear 8-week householder planning decision timeline.

Interior fit-out, Bexley

What Our Clients Say About
Extension Architecture

Interior fit-out, Bexley

Loft Conversion in Bexley

If you are looking for modern loft conversion ideas in Bexley, turning your attic into more living space is one of the best home improvement strategies that don’t mean you need to extend the house or cut down a tree on your property. Most loft conversions work with timber, and these are typically cheaper than other home extension solutions that apply bricks. However, getting to know the rules, especially if the property is located in a conservation area, is not easy.

That is where we come in at Extension Architecture. Having gained plenty of experience in compliance with these regulations, we build lofts that are integrated into the existing construction and room.

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Explore before & after visuals of our extension builder projects

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Before

After

Why Choose Extension Architecture?

Our experienced team of Bexley 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.

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Architectural design consultation and home extension planning services

Years of Experience

17

Any Questions?

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

Often not. Most single-storey rear extensions in Bexley fall under Permitted Development, so no application is needed — up to 3 metres for terraced and semi-detached homes, up to 4 metres for detached ones, measured from the original rear wall. Want more space? The Larger Home Extension Scheme lets you stretch that to 6 metres or 8 metres, though you’ll need Prior Approval and to notify your neighbours first. Double-storey extensions, side extensions, and anything in a conservation area or covered by an Article 4 direction usually still need full planning permission from the London Borough of Bexley. We’ll check your specific address and property type for free before you commit to a design, so there are no surprises later.

Bexley’s housing stock — predominantly 1930s semis and terraces across DA5, DA6, and DA7 — suits single-storey rear extensions, side returns, wraparound extensions, double-storey additions, and loft conversions particularly well, thanks to consistent plot depths and roof pitches across these estates. The right option depends on your garden size, budget, and whether you need extra bedrooms or open-plan living space. We assess your property and recommend the best-fit option as part of a free feasibility check.

Most loft conversions in Bexley qualify as Permitted Development, allowing up to 40m³ of additional roof space for terraced houses and 50m³ for semi-detached and detached homes. Hip-to-gable conversions usually require a full planning application because they alter the roof shape visible from the street, and homes in conservation areas may have reduced or removed PD rights entirely. Building Regulations approval is always required regardless of planning route, covering structural work, fire escape, and insulation. We confirm your eligibility and recommend the right conversion type for your roof shape free of charge.

8 weeks is the standard target for London Borough of Bexley to decide a householder planning application, measured from the date it’s formally validated. Applications in conservation areas or involving more complex issues (neighbour objections, listed building consent) can take up to 13 weeks. Once granted, planning permission remains valid for 3 years, giving you time to arrange finance and a builder. We monitor every application and respond to council queries immediately to avoid unnecessary delays.

A good local architect combines chartered status with a track record of approvals in your specific borough, since planning officers’ expectations vary by council. Extension Architecture is RIBA-chartered and ARB-registered, with an in-house structural engineer — an advantage only around 1 in 20 architecture firms offer — and 17 years of experience across 2,220+ completed projects in London and Surrey, including work across Bexley’s DA postcodes. We offer a free feasibility check covering planning routes, constraints, and realistic timescales before any fee is agreed.

Costs typically range from roughly £2,000–£2,800 per m² for a single-storey extension, though this varies with specification, structural complexity, and whether you’re extending a terraced, semi, or detached property. A typical rear extension on a Bexley semi might run to a wider range depending on finish level. We provide a free, no-obligation quote based on your property, budget, and goals within 60 seconds via our online form.

The service covers the full project lifecycle: initial feasibility and site survey, planning application drawings, building regulation drawings, structural engineering (in-house), 3D visualisations, and support through construction. Because structural engineering is handled in-house rather than outsourced, design and planning stay coordinated, which reduces the delays and design clashes that come from managing multiple separate consultants.

Extension Architecture covers Bexley and the surrounding area including Bexleyheath, Crayford, Erith, Slade Green, Barnehurst, Welling, Sidcup, Albany Park, Blackfen, Longlands, Northumberland Heath, and part of Thamesmead, spanning postcodes DA1 and DA5 through DA18. Local housing stock across these areas is dominated by 1930s semis and terraces, which our team has worked with extensively.

Architects for Extensions & Planning Applications  in Bexley