Choosing a London Architect? Here’s What Experienced Homeowners Look For

Talk to anyone who’s actually been through a build in London and you’ll hear a version of the same regret, or the same relief. It nearly always traces back to one decision made right at the start: who they hired to draw the thing.

Builders matter. Of course they do. But the builder is working off someone else’s drawings, and if those drawings are weak, or the planning strategy behind them was never thought through, no amount of good bricklaying saves you. I’ve seen a lovely rear extension in Balham held up for the better part of a year because the original application picked a fight with the conservation officer it was never going to win. Different architect, different framing, and it probably sails through. That’s the whole game, really.

Problem is, choosing well is hard. There are a staggering number of architects in London – one-person outfits, mid-size studios, the big names with a receptionist and a waiting list, and every single portfolio is wall-to-wall with the same honey-lit kitchen extension. So what are the people who’ve done this before, the ones on their second or third project, quietly checking for? A few things. None of them are the photos.

Local knowledge beats a shiny reputation

Here’s something people underestimate. London isn’t one place, planning-wise. It’s 32 boroughs, each running its own local plan, its own conservation area boundaries, its own unwritten rules about what gets nodded through and what gets picked apart.

An architect can be genuinely brilliant in, say, Hackney and then come unstuck in Richmond — not through lack of talent, but because they don’t know how that particular department reads its own policies. And they do read them differently. Wandsworth can be sticky about side returns on certain terraces. An Islington conservation officer will look at your proposed window sightlines like they’re marking an exam.

Good architects in Sutton have already sat across the table from these people. They know the officer by name. They know what phrasing lands and what raises hackles. That’s not a small thing — it’s months off your timeline and a real bump to your chances of approval.

So ask the blunt question: how many jobs have you actually delivered in my borough? If you’re down in Sutton, you want someone who knows the local mix — the interwar semis, the pockets of Victorian stock, the way permitted development interacts with all of it. Architects who work regularly in Sutton and across south London aren’t guessing at the local appetite for a rear extension. They’ve done twenty of them. General experience is grand. Local experience is the thing.

How to read a portfolio properly

Most people leaf through a portfolio the way you’d browse Pinterest. Ooh, nice. Bad instinct. The pictures are chosen to seduce you. What you’re really trying to read is judgement.

A few things worth hunting for:

Homes like yours. If you’re in a 1900s Edwardian terrace, has this practice actually wrestled with solid brick walls, sagging timber floors, that horrible half-level at the back? Period work is its own craft. It is not the same skill as a new-build.
Variety inside tight constraints. If every project looks weirdly similar, that’s a house style being stamped on people. You want design that answers the house, not a signature being repeated.
The awkward sites — north-facing gardens, slivers of plots, a listed neighbour hemming them in. Solving the nasty ones is where the real ability shows.
Finished buildings, not just renders. Pretty CGI is cheap and everyone has it. Photos of a project that’s actually been built and lived in — that proves they can carry an idea all the way through, which is the hard part.

And if they can talk you through why — why the roofline stepped there, why the glazing faces that way — you’re dealing with someone who designs on purpose. Not out of habit.

The one question worth asking

Ask about a job that went sideways. A refusal, a nightmare contractor, a client who redesigned the kitchen four times. Every architect with real mileage has one, and how they tell it says everything. Do they own their part in it? Or is it always someone else’s fault? Anyone who insists every project has been perfect is either green or fibbing, and neither’s what you want.

What you’re actually paying for

There’s a stubborn myth that architects are a posh optional extra — that you can skip the fee by going straight to a design-and-build lot. For a dead-simple job, occasionally, fair enough. For anything touching planning, structure, or a conservation area? Almost never.

A good one earns the fee in ways you don’t see on day one:

The planning play — knowing what to submit, how to frame it, when to negotiate instead of picking a fight.
Spatial thinking — turning your scribbled wish list into a layout that genuinely changes how the house feels to live in, rather than just adding square metres.
Herding everyone — the structural engineer, the party wall surveyor, building control. So it’s not you on the phone at 8pm chasing people.
Protecting the value — design that ages well and adds to the property, instead of a cheap-looking box that dates in a decade.

The cheapest quote is hardly ever the best value. A practice charging a fair fee that gets your loft conversion through first time will cost you far less than the bargain option that triggers a resubmission and half a year of waiting.

A quick word on RIBA and ARB

Check they’re RIBA chartered, or that the individual is ARB registered. It’s not a guarantee of genius — plenty of dull architects are chartered — but it means proper training, professional indemnity insurance, a recognised bar cleared. On a project worth tens of thousands, that floor of protection is worth having.

The three routes, side by side

Most homeowners are really choosing between three options. Roughly:

Route	Best for	The catch
Independent architect	Bespoke design, tricky sites, conservation areas	Higher fees, may be booked up
Design-and-build firm	Simple, off-the-peg extensions	Design gets compromised; advice isn’t impartial
Architectural technologist	Technical drawings, straightforward jobs	Less design-led, thinner on planning strategy

For most London projects — period homes, planning sensitivity, all of it — a design-led practice tends to give you the best mix of imagination and technical grip. The extra spend usually earns itself back through a calmer planning process and a house you actually like living in.

Do you get on with them?

Underrated, this. You’ll be tied to this person for a year, maybe more, through decisions that hit your bank balance and your daily routine. If they’re patronising, or vague, or vanish for a fortnight at the first meeting — that doesn’t magically fix itself once you’ve signed.

The good ones listen. Properly. They ask how you use the kitchen, whether you have people over, where the light goes in the afternoon, what drove you round the bend about your last place. Good design starts with good questions. If the first meeting is all their grand vision and none of your actual life, be a bit wary.

The short version, if you skim nothing else:

Local borough experience trumps general fame.
Read portfolios for judgement, not looks.
Treat the fee as buying approval and long-term value.
Check the registration (RIBA / ARB).
Trust your gut on whether you click — you’re in this together for a while.

What should I have ready for the first meeting?
A rough budget, a wish list, photos of things you like, and the basics on your property. The more you bring, the more that first conversation earns its keep.

Last thought

Strip it all back and choosing among the many architects in London comes down to something pretty human — finding a professional who knows the local terrain, actually listens, and does what they said they’d do. Everything else, the drawings, the planning strategy, the finished home, flows out of getting that first call right.

Which is the ground. Extension Architecture has quietly made its own. It’s a practice built around bespoke residential architecture across London — house extensions, loft conversions, renovations, full architectural design — working shoulder to shoulder with homeowners rather than handing down a template. Each project starts from the actual house and the way its owners actually live in it. And from the first rough sketches through planning permission and the coordination on site, the team carries the fiddly bits so the whole thing feels doable instead of daunting.

What really separates the thoughtful practices is that they design for the long game — homes that work day to day, that respect the character of London’s older streets, and that hold their value years down the line. Get the architect right and, honestly, everything after it gets easier.