How to Interview an Architect: Essential Questions for Homeowners

Why a Structured Interview Matters

Hiring an architect is one of the most consequential decisions you will make during a renovation or extension project. The right practice can save you tens of thousands of pounds, months of delay, and enormous stress. Yet many homeowners in Hampstead and the surrounding NW postcodes choose their architect based on a single recommendation without ever conducting a proper interview. Taking an hour to ask focused questions before you commit will pay dividends throughout the project.

Reviewing Their Portfolio

Ask to see three or four completed projects of a similar scale and type to yours. Pay attention to whether those projects share the character of your neighbourhood — a practice experienced with Victorian terraces in Belsize Park will understand the proportions and detailing that Camden planners expect. Request before-and-after photographs and, ideally, the planning drawings so you can see how skillfully constraints were turned into design opportunities.

Fee Structure and Payment Terms

Architects charge in several ways: a percentage of the construction cost (typically eight to twelve per cent for residential work), a fixed lump sum, or hourly rates. Ask exactly what is included at each stage. Does the quoted fee cover measured survey coordination, structural engineer liaison, and building control submissions? Clarify when stage payments fall due and what happens to fees if planning is refused or the project is paused. Getting this in writing avoids the single most common source of client–architect disputes.

Planning and Conservation Experience

In areas like Hampstead, Highgate, and Gospel Oak, planning is rarely straightforward. Ask how many applications the practice has submitted to Camden in the last two years and what the approval rate was. If your property sits within the Hampstead Conservation Area, probe their experience with heritage statements and their relationship with the council's conservation officers. A practice that has navigated these waters before will anticipate objections and design around them from day one.

Project Management Approach

Some architects offer a full contract-administration service, attending site regularly and issuing instructions to the builder. Others hand over drawings and step back. Ask which model they propose, how often they visit site, and how variations and unforeseen costs are handled. If they recommend a design-and-build contractor instead of a traditional tender, understand the trade-offs for quality control and cost transparency.

Insurance and Professional Registration

Confirm the practice carries professional indemnity insurance — a minimum of one million pounds for a typical residential extension — and that they are registered with the Architects Registration Board (ARB). Membership of RIBA is desirable but not legally required. Ask for their ARB registration number and verify it online before signing an appointment.

Communication Style and References

Discuss how often you will receive progress updates and in what format. Weekly email summaries with marked-up drawings work well for most homeowners. Finally, ask for two client references and actually call them. Questions to put to referees: Was the project delivered on budget? How were unexpected problems communicated? Would you use the practice again?

Next Steps

If you are preparing for interviews, having a clear brief makes every conversation more productive — see our architect brief template for a downloadable starting point. For guidance on selecting the right practice for your area, read our choosing an architect in NW3 overview, or explore our Primrose Hill architect page if your project is further south.

For interior layout advice during the design stage, designhampstead.co.uk offers specialist guidance, and hampsteadrenovationcosts.co.uk publishes current cost benchmarks for North West London projects.

Ready to find an architect who is the right fit for your project? Get in touch through our matching service and we will connect you with practices experienced in your specific property type and location.

Architect Hampstead is a matching service operated by Hampstead Renovations Ltd. We are not an architecture practice and do not provide architectural services directly.