Extending Your Home in Fulham: The 5 Questions People Actually Ask

Fulham has a lot of Victorian terraces and quite a bit of planning complexity. Here are the 5 questions that come up most, answered simply.

Do I Need Planning Permission for My Extension?

It depends on your street. Some parts of Fulham still have full permitted development rights. But Article 4 Directions remove those rights on many streets across W6, W12, and SW6. Where that applies, even a simple single storey rear extension needs a full planning application.

Architects in Fulham check your address against the Article 4 map before any design work starts. It costs nothing to ask, and it changes everything about how your project needs to run. Skipping this step is the single biggest reason projects lose time later, once drawings already exist for a route that was never actually available. A short phone call at the very start avoids that entirely.

What Kind of Extension Actually Suits My House?

Victorian terraces dominate this area. Most suit a single storey rear extension, a side return, or a wraparound well. Loft conversions work too, whether that's a Velux, a dormer, or a hip to gable design. With 13 conservation areas across the borough, what actually suits your house often comes down to your specific street rather than a general rule.

A property that's already had one extension may also have used up part of its permitted development allowance. This is worth checking before assuming a second project will automatically qualify the same way the first one did. A quick review of past planning history for the property settles this quickly.

How Long Does Planning Actually Take?

The council aims for 8 weeks on a standard householder application. Anything more complex, or inside a conservation area, can stretch to around 13 weeks. Once you get permission, it stays valid for 3 years. That gives you a decent window to sort your budget and find a builder without rushing.

Most people forget to account for the weeks before submission too. Drawings, structural calculations, and any pre-application checks all add time. A realistic total timeline from first conversation to decision usually lands closer to 3 or 4 months. Planning around that longer window from the start avoids unnecessary frustration once the process is actually under way.

How Much Does an Architect Actually Cost Here?

It depends on your project's size and scope. Some firms charge a fixed fee for smaller extensions. Others work on a percentage of the total build cost for bigger jobs. Either way, get a like-for-like quote from a few local firms, since what's actually included varies a lot. Some only do drawings. Others manage design, planning, and structural calculations together under one fee.

A single storey rear extension in London generally costs £75,000 to £120,000. A loft conversion tends to sit lower, usually £45,000 to £95,000, depending on the type and scale involved. Planning fees, structural calculations, and building regulations inspections all sit on top of these core construction figures. Getting a proper feasibility estimate early gives a far more accurate picture than any generic online calculator ever will.

Do I Need an Architect, or Is a Planning Consultant Enough?

A planning consultant can help you get permission. But they usually don't produce architectural drawings, building regulations drawings, or manage the actual build. An architect covers the whole process. Having one firm handle planning strategy, design, and structural engineering together usually means fewer handoffs and fewer delays than juggling separate specialists yourself.

This matters most once construction starts. A structural detail that needs adjusting gets resolved faster when the same team designed it in the first place, rather than waiting on a separate consultant to get back up to speed on drawings they haven't seen before.

What This Actually Means for Your Project

Fulham's mix of Article 4 streets and conservation areas makes the planning check the single most important first step. Skip it, and you risk designing something that was never actually available to you. Check it first, and everything else, timeline, budget, design options, follows from an accurate starting point.

With 17 years of experience, over 1,800 planning approvals across London and Surrey, RIBA Chartered status, ARB registration, and an in-house structural engineer, the right team checks your specific address before agreeing any design fee.

Call 0203 409 4215 or book a free consultation to find out exactly where your Fulham property stands.