Clients often ask whether they need an architect or an interior designer — sometimes assuming the two do the same job, or that hiring one makes the other unnecessary. The two roles overlap in places, but they solve different problems at different stages of a project.
What an Architect Does
An architect designs the building itself — the overall structure, room layout, how spaces connect to each other, and how the building relates to its plot, orientation, and surroundings. This work usually starts before construction begins and includes structural coordination, floor planning, and getting the design through local approval processes like RAJUK.
What an Interior Designer Does
An interior designer works within spaces that are already built or already designed — finishes, furniture layout, lighting, color, materials, and the overall feel and function of individual rooms. Interior design can happen on a newly built structure or on an existing home being renovated, and it does not typically involve structural changes to the building itself.
Where the Two Overlap
On a new-build project, architecture and interior design often need to talk to each other early — window placement affects natural light and furniture layout, ceiling height affects what fixtures work, and structural columns can land in the middle of a room if nobody checks the interior plan against the architectural drawings. This is why some firms offer both services under one team, so design decisions on either side don’t contradict each other later.
Do You Need Both?
For a new house or commercial space, usually yes — an architect to get the structure and layout right, and an interior designer to finish the spaces for how they’ll actually be used and lived in. For a renovation or refresh of an existing space with no structural changes, an interior designer alone is often enough. If walls are moving, floors are being added, or RAJUK approval is involved, you need an architect regardless of how much interior design follows.
How We Handle This at Mark D Studio
We offer architectural design and interior design under one team, so the building’s structure and its interior finishing are planned together rather than handed off cold between separate firms. See our interior design service for what that covers, or our architectural design service for the structural and planning side.
Talk Through Your Project’s Scope
Not sure which one your project needs, or whether it needs both? Book a free consultation and we’ll walk through your space and tell you plainly what’s required.
Frequently Asked Questions
Can an interior designer design a house from scratch?
No — designing a building’s structure, layout, and getting it approved by local authorities is an architect’s job. An interior designer works on finishes and furnishing within a space that’s already designed or built.
Do I need an architect for a renovation that doesn’t change the structure?
Not necessarily. If no walls are moving and no structural work is involved, an interior designer can usually handle a renovation or refresh on their own.
Should I hire an architect and an interior designer separately, or one firm for both?
Either can work, but using one team for both reduces the risk of the interior plan clashing with structural decisions like column placement or ceiling height.
Related Reading
- Architect vs. Engineer vs. Contractor: Who Do You Actually Need?
- How to Choose the Right Architect in Dhaka: A Client’s Checklist
- Open-Plan vs. Traditional Layout: Which Suits Bangladeshi Families?