Design team
Architects for extensions and renovations: what homeowners need to know
Most homeowners meet an architect before they meet a builder, and it is usually the first professional appointment of the project. Understanding what you are buying — drawings, applications, tender support, site involvement, or all of it — makes the rest of the project far easier to control.
What an architect is actually appointed to do
Architectural work on a home project is usually broken into stages, and you can appoint for some stages and not others. The confusion homeowners run into is assuming that a design fee covers the whole journey when it often stops at planning.
- Survey and existing drawings: measuring what is there today.
- Concept design: options for how the space could work.
- Planning application drawings and submission, where permission is needed.
- Building regulations and technical drawings, with structural input.
- Tender support: issuing information to builders and helping compare what comes back.
- Contract administration on site: valuing work, issuing instructions, certifying payment.
Do you always need an architect?
Not always. Simple, well-precedented work is sometimes handled by an architectural technologist, a design-and-build contractor's in-house designer, or a surveyor. Complex, listed, tight-site, or design-led work usually benefits from a qualified architect.
The right question is not 'architect or not' but 'who is responsible for the drawings, the applications and the answers when something on site does not match the plan'. Somebody has to hold that, and if nobody does, it lands on you.
How fees are usually structured
Ask what is excluded as carefully as what is included. Structural engineering, party wall matters, building control fees and measured surveys are frequently outside a design fee.
- A percentage of construction cost, common on larger or full-service appointments.
- A fixed fee per stage, common on domestic extensions.
- An hourly rate for ad-hoc advice or site attendance.
- Disbursements: planning fees, surveys, printing and consultant coordination are often extra.
Case-style example
A common misunderstanding
A homeowner appoints a designer for a rear extension and receives planning permission. They then ask builders to price the work and receive quotes that vary by tens of thousands of pounds.
The reason is that the planning drawings show the shape of the building, not the specification: no structural detail, no window performance, no floor build-up, no drainage. Each builder has priced their own assumptions. The gap is not dishonesty; it is missing information.
Deciding whether to buy the technical stage before tendering is one of the highest-value decisions in the whole project.
How The Construction Clinic helps with this decision
We do not design buildings and we do not recommend particular practices. We help you understand what to appoint, what a fee proposal should cover, what is missing from the information you already hold, and what that means for the quotes you are about to receive.
Common questions
Questions homeowners ask about this
Can I go straight to a builder without an architect?
You can, particularly for simple work or a design-and-build arrangement. The trade-off is that the designer then works for the contractor, so you should be clear about who is checking the design in your interest.
Does an architect manage my builder?
Only if you appoint them to. Contract administration and site inspection are usually a separate stage, priced separately. Without it, nobody independent is valuing the work or certifying payments.
What should I ask before appointing?
Which stages the fee covers, what is excluded, who does the structural design, what happens if planning is refused, and how site queries are handled once building starts.
Does The Construction Clinic recommend architects?
No. We are guidance and decision support for homeowners, not a directory or referral service. We help you assess proposals you have already received.