Interview at least three, ask each how they handle cost overruns during design, confirm exactly what is basic service versus additional service, and require a deliverables list by phase. Fee percentage matters far less than scope clarity and cost discipline.
Questions that separate firms
What happens if the design comes in over budget — who pays to redesign?
Who prepares the cost estimate at each phase, and how has that tracked on recent projects?
What consultants are included, and which are the owner's responsibility to hire?
How many site visits are in the fee during construction?
Who reviews submittals and responds to RFIs, and how quickly?
Fee structures
Structure
Works well when
Risk
Percentage of construction cost
Scope is loosely defined early
Fee grows as budget grows
Fixed fee
Scope is clear
Additional services claims if scope drifts
Hourly with cap
Small or investigative work
Requires close tracking
The clause worth negotiating
Redesign responsibility when bids exceed the agreed budget. Standard industry agreements often make significant redesign an additional service. Negotiating that up front — one round of value-driven revision at no additional fee if bids exceed the stated budget by a defined margin — is a reasonable ask and a frequent source of unbudgeted cost when it is missed.
Common questions
Do I need an architect for a small renovation?
Not always — many small residential projects can be permitted with a designer or the contractor's drawings. Once you touch structure, egress, accessibility, or change of use, licensed design is usually required and always advisable.