They get used interchangeably and they are not the same thing. One produces drawings. The other produces a finished office on a committed date. Buying the wrong one is how projects end up half-built.
Interior design is the creation of the scheme. A fit-out is the physical delivery of it. A designer decides what the space should be. A fit-out contractor makes it exist, on a programme, against a budget, with someone accountable when a trade does not turn up.
Both are legitimate purchases. The problem is that many occupiers buy design, assume delivery was included, and discover halfway through that nobody owns the handover date.
| Interior design | Office fit-out | |
|---|---|---|
| Deliverable | Concept, layouts, renders, material boards, working drawings | A completed, commissioned, occupiable office |
| Ends when | Drawings are issued and approved | Snags are closed and you have the keys |
| Priced as | A fee, often per sq ft or a percentage of project value | A BOQ against measured quantities and rates |
| Buys you | Design intent and documentation | Materials, labour, trades, plant, supervision and warranty |
| Who carries schedule risk | Nobody, in most design-only appointments | The fit-out contractor |
| Typical share of spend | Roughly 3% to 8% of project value | The remaining 92% to 97% |
| Handles landlord approvals | Prepares drawings for them | Submits, chases and closes them |
A design-only appointment produces a beautiful set of drawings that has never been priced by anyone who has to build it. Three things then tend to happen.
Ask any prospective partner: "Who is contractually responsible for the handover date, and what happens if it slips?" If the answer names a person and a mechanism, you are buying a fit-out. If the answer is about drawing issue dates, you are buying design.
You appoint a design practice, get a documented scheme, then tender it to contractors. Works well when you have an in-house projects team or an appointed project manager who can run the tender, hold the contractors to account and resolve site queries. Without that internal capability it is the riskiest of the three, because the coordination burden lands on you.
One party owns design and delivery. You get a single point of accountability, faster mobilisation, and design decisions that are cost-checked as they are made rather than after. This is how most corporate occupiers in Noida and Delhi NCR deliver offices, and it is how we work.
You already have an architect. You appoint a contractor to price and build the issued drawings. Sensible when the design is genuinely complete and buildable. The thing to insist on is that the contractor reviews the drawings for buildability and flags conflicts before signing, not once the site is open. We do this appointment too and will tell you upfront what will not execute as drawn.
"Fit-out" is the term used in commercial leasing and it carries a specific meaning: the works that convert a base-build or Cat A floor into an occupiable workplace. "Interior design" is the broader discipline covering everything from a bedroom to a boardroom. If you search for interior designers, you get a market that is mostly residential. If you search for a fit out company, you get contractors who work to commercial programmes, landlord fit-out manuals and BOQs. The vocabulary you use genuinely changes who you end up talking to.
Aatharv Interior operates as a turnkey office fit out company: design, procurement, civil, MEP, joinery, furniture, site management and handover under one accountable team. We have delivered over 8 million sq ft and 500+ commercial projects, including multi-city workplace rollouts for Unacademy, Physics Wallah and Vedantu.
We also take design-complete appointments where you bring your own architect, and we take over stalled sites where another contractor has left the job unfinished.
Interior design creates the scheme: concepts, layouts, renders, material selection and working drawings. An office fit-out is the physical delivery of that scheme: procurement, civil work, MEP, joinery, furniture installation, approvals, commissioning and snag closure. Design ends when drawings are issued. A fit-out ends when you have an occupiable office and the keys. Design is typically 3% to 8% of project value; the fit-out is the rest.
Not necessarily. In a turnkey or design-and-build appointment, one company owns both, which gives you a single point of accountability and means design decisions are cost-checked as they are made. Appointing them separately makes sense if you have an in-house projects team or an appointed project manager who can run the tender and resolve site queries. Without that internal capability, splitting them puts the coordination risk on you.
Cat A is the landlord's scope and delivers a serviceable but empty floor: raised flooring or screed, basic suspended ceiling, primary HVAC distribution, base lighting and fire detection. Cat B is the tenant's scope and converts that into a working office: cabins, meeting rooms, reception, workstations, pantry, secondary MEP, AV and IT, branding and furniture. Most corporate occupiers need a Cat B fit-out.
Yes. This is a fit-out-only appointment and it is common where the design is already complete. The one thing to insist on is a buildability review before you sign, so the contractor flags any detail that conflicts with the existing structure, services or the landlord's fit-out manual while it is still cheap to resolve.
A test fit is a fast, low-cost piece of space planning that shows whether your headcount, cabins and meeting rooms actually fit into a floor you are considering, and gives you a rough cost. Get one before you sign the lease. It is the cheapest way to avoid committing to a floor that cannot hold your team or cannot be fitted out within your budget.
Tell us where the project is: a floor you are considering, a lease already signed, or drawings already done. We will tell you what scope you actually need, including when the honest answer is that you do not need us yet.
