The SW15 Postcode Check That Decides Everything Before Your Putney Project Begins

Extension Architecture has been based at 231 Roehampton Lane in SW15 for years, and that physical presence in Putney shapes how we work in a way that firms based elsewhere simply cant replicate. We know which streets carry Article 4 Directions. We know how Wandsworth Council reads submissions from this specific corner of the borough. And we know what the Victorian and Edwardian terraces across SW15, SW18, and SW19 can realistically become when the planning process is handled properly. Forty four completed projects across Putney, a 98% planning approval rate, and around 60 active applications with Wandsworth Council at any given time. If youre looking for a Putney residential extension architect who genuinely knows this ground, that combination of local presence and project track record is what real expertise looks like.

Why Article 4 Directions Are the First Thing We Check in SW15

Many homeowners in Putney start the extension process assuming their project falls within permitted development. In SW15, that assumption is wrong more often than people expect. Article 4 Directions cover many streets across the postcode, removing the permitted development rights that would normally allow modest rear extensions and loft conversions to go ahead without a planning application.

We check every Putney address against Wandsworth's Article 4 mapping before any design work begins, at no charge. The answer shapes the whole project plan, from the timeline to how the application needs to be prepared. Finding out after a design has been developed that a full planning application is needed adds time that a five minute check at the start would have prevented.

What 60 Active Wandsworth Applications Teaches You

Running around 60 applications through Wandsworth Council simultaneously puts us in a position that most architectural firms simply cannot match in this borough. We know which design details officers focus on most closely. We know how the council responds to different types of proposals across different parts of SW15. And we know how to prepare a submission that moves through the standard 8 week decision period without complications.

That institutional knowledge of a specific planning authority is something that only comes from consistent, long term work in a specific place. It's the difference between knowing London planning generally and knowing Wandsworth Council specifically.

1 Dyers Lane and 1 Hansler Road: What Real Putney Projects Look Like

Our gallery includes completed projects at 1 Dyers Lane and 1 Hansler Road in Putney. These arent aspirational renders. They're finished buildings, approved by Wandsworth Council, built and lived in by real families.

The Dyers Lane project involved a Victorian terrace where the rear extension brief required careful coordination between the new open plan ground floor layout and the relationship to neighbouring properties on both sides. The finished result changed how the whole ground floor worked without generating any objections during the planning process. First time approval, on the standard 8 week timeline.

Victorian and Edwardian SW15 and the Side Return Question

The Victorian and Edwardian terraces that dominate SW15 are worth an average of around £1.3 million, and the homeowners who live in them take their properties seriously. These houses have real character worth protecting and genuine potential worth unlocking.

The side return running alongside the kitchen on most of these properties is consistently one of the most underused spaces on the plot. Incorporating it into a rear extension widens the ground floor considerably and creates an L shaped addition that feels more generous than a straight extension alone. We've designed this approach across multiple SW15 properties and the finished result changes how families use the ground floor in ways that adding depth alone simply doesnt achieve.

In House Structural Engineering: What Only One in Twenty Firms Can Offer

Extension Architecture carries an in house structural engineer, an advantage that only around one in twenty architectural firms can offer. For Putney projects specifically, where basement conversions are more common than in most of south west London and where the structural implications of extending Victorian properties need careful coordination, having this expertise within the same team changes how efficiently the project moves.

Structural calculations inform the design from the start rather than following it. The drawings that go to both planning and building control are coordinated and accurate when they arrive. No time lost between separate consultants who arent talking to each other.

The Turn Key Approach Under One Fixed Fee

Planning application drawings, 3D visualisations, retrospective planning where needed, building regulations, interior design, and project management. All of it handled under one fixed fee by one team based in Putney itself.

That joined up approach exists because we've seen what happens when different stages of a project are handled by different people who arent properly coordinating. The gaps between them are where problems develop and costs accumulate. One team, one fee, one point of contact from the first site visit through to the final sign off.