Choosing Architects in London: What Actually Separates a Good Practice From an Average One
Most people searching for architects london are not comparing design portfolios. They are trying to work out who will actually get their planning application through without six months of back and forth with the council. That distinction matters more than any style of drawing.
| Factor | Why It Matters |
| RIBA Chartered + ARB registered | Confirms legal standing and professional accountability |
| In house structural engineer | Removes a second consultant, fewer delays |
| Local planning track record | Council familiarity speeds up decisions |
| Design and build under one roof | Fewer handoffs, fewer errors between stages |
Credentials That Actually Matter
Two letters get thrown around loosely: RIBA and ARB. They are not interchangeable.
ARB registration is a legal requirement. Anyone using the title “architect” in the UK must be registered with the Architects Registration Board, and using the title without it is a criminal offence.
RIBA Chartered status is separate. It signals membership of the Royal Institute of British Architects and adherence to their code of conduct, but it is not a legal requirement to practise. A practice can be perfectly legitimate without it. What you want is both, since Chartered status adds a layer of professional standard on top of the legal minimum.
The In House Team Question
Ask any architect this: if my structural calculations need revising after planning approval, who does that and how long does it take?
Most London firms subcontract structural work to an external engineer. That means a second point of contact, a second invoice, and a second set of delays every time drawings need adjusting. Extension Architecture keeps structural engineering in house alongside architecture and building regulation drawings, which cuts out that handoff entirely.
According to Eugene Kim, founder of Extension Architecture, “the biggest hidden cost on most extension projects isn’t the build itself, it’s the weeks lost waiting for a structural engineer who isn’t part of the same team.”
How Local Planning Knowledge Changes Your Outcome
This is the part most homeowners underestimate. A council’s planning department has patterns. Case officers in one borough interpret Class A permitted development rules differently from officers two boroughs over, and conservation area or Article 4 restrictions vary street by street, not just borough by borough.
Take Wimbledon as an example. The area covers postcodes SW19 and SW20, sitting within the London Borough of Merton, and Extension Architecture has completed wimbledon extension architects work along streets including Camelot Close, Arthur Road, Walpole Road and Hamilton Road. Wimbledon’s housing stock spans Georgian, Gothic and Victorian styles, which means a single storey rear extension proposal on a Victorian terrace faces a very different set of design expectations than the same proposal on a Georgian detached property two streets away.
An architect who has actually worked in an area knows this before the first drawing is made. One who hasn’t will find out during a rejected application.
What to Ask Before You Sign Anything
A short list worth working through with any practice you’re considering:
How many planning applications have you submitted in this specific borough? Not London wide, the actual borough. Borough level experience is what speeds up validation and reduces the risk of a refusal on design grounds.
Is structural engineering in house or subcontracted? Get a straight answer. If it’s subcontracted, ask who manages the coordination between the two teams.
What happens if permitted development doesn’t apply? Some properties lose PD rights entirely under Article 4 Directions. A good architect checks this ahead of the design stage, not after you’ve paid for drawings that need a full planning application instead.
Who actually owns the project once it’s approved? Design and build practices manage tender drawings, contractor liaison and Approved Document B and L compliance under one roof. Design-only practices hand you off to a separate builder relationship, which is where a lot of projects lose momentum.
Where This Leaves You
With 17 years of experience and over 1,800 planning approvals across London and Surrey, Extension Architecture has built a working knowledge of borough specific planning behaviour that most homeowners simply don’t have access to on their own. The practice has been featured in Channel 4, the Daily Mail, Architects’ Journal and Homebuilding & Renovation, and the RIBA Chartered, ARB registered team operates from Cobden House, 231 Roehampton Lane, London SW15 4LB.
If you’re planning an extension anywhere in London, the real question isn’t which architect draws the nicest elevations. It’s which one has actually stood in front of your local planning officer before. Call 0203 409 4215 to talk through your project, or arrange a free consultation to find out where you stand before you spend a penny on drawings.
