The interior design process step by step for a Mumbai flat: what happens at each stage, what you need to provide and what to check before moving on.
Short answer: A well-run interior project in Mumbai moves through eight stages: site visit, measurement, concept and 3D design, itemised BOQ, approval, execution, snagging and handover. Each stage has a clear output that you sign off before the next begins. If a designer cannot tell you what you will receive at each stage, the process is probably not defined yet.
Most people feel uneasy about interior work because they cannot see the road ahead. Who does what? When do you pay? When can you still change your mind? This guide walks through the full process as we run it at velvetspace, with what we need from you and what you should check at each step. Use it to judge any designer, including us.
The process at a glance
- 1. Site visit: Walk through the flat, discuss needs and budget; What you receive: Initial direction and scope notes
- 2. Measurement: Accurate measurements and site condition check; What you receive: Measured base drawing
- 3. Concept and 3D: Layout, materials and 3D views; What you receive: Floor plan, elevations, 3D views
- 4. BOQ: Itemised list of work, materials and quantities; What you receive: Line-by-line BOQ
- 5. Approval: You review, revise and confirm; What you receive: Signed scope, BOQ and payment schedule
- 6. Execution: Civil, electrical, carpentry, finishing; What you receive: Progress updates and site checks
- 7. Snagging: Detailed check for defects and gaps; What you receive: Snag list and fixes
- 8. Handover: Cleaning, final walk-through, care guidance; What you receive: A finished, usable home
Stage 1: Site visit
Everything starts with standing in your flat. A site visit shows what a floor plan cannot: where light comes in, which wall is damp-prone, how tall the beams are, where the pipes run and how the corridor and lift lobby look when materials need to be carried in.
We use this visit to understand how your family lives. Do you cook daily with heavy tadka? Does someone work from home? Are there elders who need easy access? We also talk about a realistic budget range, because it shapes every decision after this.
What we need from you
- Your priorities, ranked: kitchen, wardrobes, living area, bedrooms, pooja unit.
- A budget range you are comfortable with, even if approximate.
- The builder's floor plan, if you have one, and any society documents you have received.
- Your expected move-in date, so we can judge whether it is realistic.
What to check
Does the designer ask questions about your routine, or only about colours? Do they note site problems such as seepage or uneven walls? A good visit feels like a conversation, not a sales pitch.
Stage 2: Measurement and site condition check
Accurate measurements decide whether a wardrobe fits, whether a kitchen trolley opens fully and whether a TV unit leaves enough walking space. Flats are rarely perfectly square, so we measure each wall, window, door, beam and column and mark the electrical and plumbing points.
This is also when we flag problems early: damp patches, old wiring, a sloping floor or a window that will clash with a planned unit. Finding these now is cheaper than finding them after carpentry has started.
What to check
Ask to see the measured drawing. Check a few dimensions yourself against your own knowledge of the flat. Errors caught here cost nothing.
Stage 3: Concept, layout and 3D design
With a measured base, we plan the space. The layout comes first: where the kitchen work zones sit, how the bedroom door swings, how much wardrobe depth the room can afford. Then comes the look: materials, colours, lighting and finishes.
We then prepare 3D views so you can see the design before anything is built. This is where most changes should happen, because moving a wall in a 3D model takes minutes, while moving a built unit takes days and money. Our separate guide explains why 3D design before interior work matters and what a useful 3D package should include.
What we need from you
- Honest feedback on layout and storage, not just colours.
- Reference images of things you like and, just as useful, things you dislike.
- Decisions within a reasonable time. Long gaps here push back the whole schedule.
What to check
Do the 3D views match the real dimensions? Are the materials named, or is it all generic? Remember that a 3D view is a close preview, not an exact photograph. Colour and texture on screen will differ slightly from the physical sample, so ask to see real material samples too.
If you would like to see how this stage works for your own flat, you can book a free site visit and we will walk you through it.
Stage 4: The itemised BOQ
Once the design is settled, we prepare a Bill of Quantities. This lists each item of work, the material and specification, the quantity and the cost. It turns a design into a clear commercial document. A BOQ is the best protection you have against vague quotes and later disputes. We have written a full guide on how to read a BOQ in interior design.
A good BOQ separates civil work, electrical, carpentry, finishes, hardware and decor. It states what is included and what is not. If something is excluded, such as curtains or appliances, it should say so clearly.
What to check
- Is every room covered, or are some items bundled into a single lump sum?
- Are material grades, thicknesses and finishes named?
- Are hardware and accessories specified?
- Are exclusions listed in plain words?
Stage 5: Review and approval
This is your decision point. Read the drawings and BOQ carefully, ask questions and request changes. We revise until you are comfortable. Only then do both sides confirm the scope, the BOQ and the payment schedule in writing.
Take your time here. Rushing approval to start work sooner is how people end up with surprises later. It also helps to read about hidden costs in interior work before you sign anything, so you know which questions to ask.
What we need from you
- Written approval of drawings and BOQ.
- Clarity on the payment milestones and what each one is linked to.
- Any society formalities on your side, such as work permission and deposits. Rules differ, so confirm with your society and site.
Stage 6: Execution on site
Execution usually starts with civil and electrical work, then false ceiling if planned, then carpentry, then painting and finishing, then lights, fittings and cleaning. The order matters. For example, painting before carpentry is complete leads to touch-ups and dust problems.
In Mumbai, execution needs extra care. Monsoon humidity affects timber, paint and adhesives, and lift and working-hour restrictions in societies affect how fast materials can move. Confirm your society's rules early, as they can influence the schedule. For a closer look at timelines, see how long interior work takes.
What to check during execution
- Visit the site at agreed points, such as after electrical work and before closing walls or ceilings.
- Compare what is being installed with the BOQ: material, thickness, hardware.
- Ask for any change to be recorded in writing, with the cost and time impact stated before the work is done.
- Keep one point of contact on the designer's side for questions.
Stage 7: Snagging
Snagging means a careful, room-by-room inspection for small defects: misaligned shutters, paint patches, loose handles, uneven edges, switches that do not work, silicone gaps. Almost every project has a snag list. What matters is that it is made honestly and cleared properly.
We recommend you inspect in daylight and again with the lights on. Open every drawer and door, test every switch and tap, and run your hand along edges and joints. Note issues with photos so they are easy to track.
Stage 8: Handover
Handover is more than handing over keys. It should include final cleaning, a walk-through with you, a check against the signed BOQ and guidance on caring for the materials, such as how to clean laminates and what to avoid during monsoon. Keep copies of the final drawings and BOQ for future reference, as they will help if you ever need to add a unit or repair something.
A simple checklist you can use at any designer's office
- Can they explain all eight stages in plain words?
- Do you get measured drawings and 3D views before work begins?
- Is the quote itemised?
- Is the payment schedule linked to progress, not just calendar dates?
- Is there a clear way to record changes?
- Is there a snagging and handover step?
If you want to see how this applies to your flat, read about our residential interior design service or book a free site visit. We will walk through your flat, discuss your priorities and give you a free estimate based on what we see.
Frequently asked questions
How long does the whole interior design process take?
It depends on the size of the flat, the scope, material availability and society restrictions. Design and approval usually take a few weeks and execution takes longer. We give a timeline after the site visit and scope are clear, and we suggest you confirm working hours and lift rules with your society.
Can I make changes after the design is approved?
Yes, but changes are cheapest before execution starts. Once work is under way, a change may affect cost and time, so it should be agreed in writing first.
Do I need to be at the site every day?
No. You should visit at key points, such as after electrical work and before carpentry is closed up, and when major units are installed. Regular updates from your designer should cover the rest.
What happens if I find defects after handover?
Report them promptly, with photos. Ask your designer before signing the project agreement how post-handover issues are handled and get that in writing.
