Hammersmith & Fulham Architects for House Extensions and Planning Applications

Planning applications, architectural design and building regulations for Hammersmith & Fulham homeowners. Most extensions here need a full householder application because Article 4 removes permitted development rights on many streets - decisions take around 8 weeks (up to 13 in conservation areas).

Hammersmith & Fulham Architects for Extensions and Planning Applications

Planning applications handled for Hammersmith & Fulham — decisions arrive in 8 weeks standard.
Article 4 Directions affect many W6 streets — we check PD rights first.
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 42+ completed Hammersmith Fulham projects locally.

Extension Architecture handles planning applications, house extensions, and loft conversions across Hammersmith Fulham and the wider Hammersmith & Fulham area, including W6, W12, SW6. Some streets keep Permitted Development rights, but Article 4 applies in many areas. 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

42⁺

Projects completed in Hammersmith and Fulham

2220 ⁺

Our total projects completed in London & Surrey

Locations in Hammersmith and Fulham

Hammersmith • Fulham • Shepherd’s Bush • White City • West Kensington • Parsons Green • Sands End • Munster Village • College Park (part) • Wormwood Scrubs (part)

Postcodes Served

W6, W12, SW6

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 Hammersmith And Fulham Architects Extension & Loft Conversion Projects

Planning in Hammersmith & Fulham:13 Conservation Areas and Article 4 Directions

Hammersmith & Fulham has 13 designated conservation areas and a number of Article 4 Directions that remove permitted development rights on specific streets. The housing stock is dominated by Victorian and Edwardian terraces, which suit rear extensions, side-return infills and loft conversions. Because of the Article 4 coverage, works that would be automatic elsewhere often need a full application here – so the first step on any project is confirming your address’s permitted development status against the relevant Direction.

Victorian terraces dominate W6 — ideal for rear and loft projects.
Article 4 Directions cover many streets — early planning advice is recommended.
Strong local demand means well-designed extensions consistently add lasting property value.
Hammersmith & Fulham Council works to a clear 8-week householder planning decision timeline.

Interior fit-out, Hammersmith & Fulham

What Our Clients Say About
Extension Architecture

Interior fit-out, Hammersmith & Fulham

Hammersmith And Fulham Planning Consultants And Architects for Home Extensions

As Hammersmith & Fulham architects, we have successfully completed numerous projects, bringing visions to life across boroughs. Our expertise in this area often includes home extensions, kitchen extensions and refurbishments. Many homeowners in Hammersmith & Fulham plan to stay in their homes for the long term, aiming to maximise both space and value. We understand that your home is one of your most significant investments, and we’re here to help you manage every aspect of the design, budget, and construction to ensure you achieve the highest quality results.

Even if your home isn’t in a designated green belt, there’s still a chance the Hammersmith & Fulham planning department will impose restrictions which make creating your dream home all too hard. That’s where architectural firms like Extension Architecture come in. Permitted Development rights are meant to simplify the process for many homeowners, only to find that it’s not always a possibility when it doesn’t adhere to local regulations.

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Architects in Fulham: Before & After Transformations

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Before

After

Why Choose Architects in Fulham With an In-House Structural Engineer

Our experienced team of Hammersmith and Fulham 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

We have an in-house structural engineer, so structural calculations are produced alongside the design rather than outsourced - reducing coordination delays and revisions. 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 in-house interior designers work with clients on finishes, materials and layout, coordinated directly with the architectural team to reduce delays and design conflicts. 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.

Planning a House Extension in Hammersmith & Fulham?

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?

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Honestly, it comes down to which street you’re on. Some addresses in Hammersmith & Fulham still have full Permitted Development rights, but a lot of the borough falls under Article 4 Directions — and where that’s the case, those rights are removed, so even a straightforward single-storey rear extension needs a full application to the council. Before you spend a penny on design work, we’ll check your address against the Article 4 map for you, free of charge, so you know exactly what route you’re on.

Given the borough’s Victorian terraced housing across W6, W12 and SW6, most homes lend themselves well to single-storey rear extensions, side returns, wraparound extensions, double-storey additions, or loft conversions — whether that’s a Velux, dormer, or hip-to-gable. There are also 13 conservation areas across the borough, so what suits your house often really does come down to your specific street. We’ll talk you through the options as part of a free feasibility check.

In simple terms, an Article 4 Direction takes away the Permitted Development rights that would normally let you build without a planning application. If your street is affected, work that’s automatic elsewhere instead needs full planning consent from the council — which mostly just means adding a few extra weeks to your timeline for drawings and validation, rather than changing what you can actually build. We’ll tell you upfront, free of charge, whether your address is caught by this before you commit to any design fees.

The council aims to decide householder applications within 8 weeks of validation, though anything more complex, or in a conservation area, can stretch to around 13 weeks. Once you have permission, it’s valid for 3 years, which gives you a decent window to sort finances and find a builder. We keep an eye on every application through the council portal and jump on any officer queries straight away, so things don’t stall unnecessarily.

It really depends on the size and scope of the project. Some practices charge a fixed fee for smaller residential extensions, others work on a percentage of the build cost for bigger jobs. We charge a single fixed fee covering planning, architectural design and building regulations drawings, which we agree with you after a free feasibility check. Our advice would be to get a like-for-like quote from a couple of local practices, since what’s actually included varies a lot from firm to firm — some just do drawings, others manage the whole project.

A planning consultant can be useful for getting permission, but they typically won’t produce the architectural design, the building regulations drawings, or manage the build itself — an architect covers the whole process. We combine both roles: planning strategy and RIBA-chartered design under one fee, plus an in-house structural engineer for calculations. For most extensions in the borough, having one firm take you from planning through to build just means fewer handoffs, fewer delays, and less risk of design and structural issues clashing.

Extension Architecture has completed 42+ projects across W6, W12, SW6 and the wider Hammersmith & Fulham 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.

Hammersmith & Fulham Architects for House Extensions and Planning Applications