15 Questions to Ask an Interior Designer Before You Sign

Fifteen questions decide whether an interior designer deserves your advance — but the list is the easy half. What protects you is knowing what a good answer sounds like, and what the red-flag answer sounds like, because every firm has rehearsed responses to the questions themselves. The four that matter most if you ask nothing else: what exactly is in the fee, what brands and grades will be installed, what the stage-wise payment schedule is, and who supervises the site. Below are all fifteen, grouped — money, materials, process, and people — each with both versions of the answer, plus the rupee ranges a fair 2026 answer should land inside.

Before you start: the numbers a fair answer lands in

Question topic	Fair 2026 range	Treat as a red flag
Design fee (3 BHK)	₹40–150/sq ft or ₹50,000–3 lakh lump sum	"Free design" with mandatory execution
Booking advance	5–10% of project value	More than 25% before drawings
Paid before material on site	50% or less, cumulative	60–100% upfront
Final holdback till snags close	5–10%	"Full payment at installation"
Woodwork warranty	1–10 years, in writing	Verbal "lifetime warranty"

A deeper guide to fee structures sits in what interior designers charge; keep it open while you compare.

The money questions

1. What is your fee model, and what exactly does it exclude?

Good answer: a named model — per sq ft, percentage, or lump sum — with a written deliverables list and the exclusions volunteered: site visits beyond N, MEP drawings, liaison work. Red flag: "Design is free, madam" — free design is a sales cost recovered invisibly through execution margins, and it means the drawings have no independent value or ownership.

2. What is the payment schedule, stage by stage?

Good answer: something shaped like 10-40-40-10, each instalment tied to verifiable work — material on site, carcasses installed, snags closed. Red flag: date-based instalments, or more than half the money before any material reaches your site. The schedule is your only enforcement mechanism; a firm that resists staging is telling you how the last month will go.

3. What will this scope cost, all-in, and what would make it change?

Good answer: a number with its assumptions attached, and the honest list of change triggers — site surprises, your upgrades, quantity changes at measurement. Red flag: a suspiciously low number with "we'll adjust as we go". Anchor yourself before this meeting with a neutral figure from the interior cost calculator so you recognise both lowballing and padding when you hear them.

4. Is GST included, and will I get a tax invoice?

Good answer: 18% shown as its own line, tax invoice standard. Red flag: "cash price" discounts. Beyond legality, cash removes the paper trail your warranty and any future dispute stand on.

The material questions

5. Which brands and grades will actually be installed, line by line?

Good answer: a specification sheet — board brand, grade and thickness, laminate brand, hardware make — attached to the quotation. Red flag: "only branded material, sir" with nothing in writing. Unnamed brands become the cheapest brand on delivery day.

6. What plywood grade goes where, and why?

Good answer: a reasoned split — BWR in kitchens and bathrooms-adjacent units, MR acceptable in dry bedroom internals — with ISI marks named. Red flag: either "marine ply everywhere" (an upsell; BWP belongs in genuinely wet zones) or a blank look. The grades are decodable in ten minutes; the quotation-reading guide below covers them.

7. Can I verify material on delivery, and what happens if it does not match?

Good answer: yes, deliveries are checked against the spec sheet, mismatches are replaced at the firm's cost, and payment milestones let you verify before releasing. Red flag: offence at the question. Verification-hostile vendors have a reason to be.

8. What is "or equivalent" in your quotation allowed to mean?

Good answer: substitution only with your written approval, same grade and price band, price difference passed to you. Red flag: "it just means similar quality" — undefined, it is a licence to swap every named brand after signing. This clause, and every other quotation trap, is annotated in how to read an interior design quotation.

The process questions

9. What is the week-by-week timeline, and what is day zero?

Good answer: a staged plan — design, material freeze, factory and civil in parallel, installation, snagging — counted from design sign-off, with a stated buffer. Red flag: a bare "45 days" with no stages and no definition of when counting starts. Honest 3 BHK projects run 10–14 weeks.

10. Who supervises my site, and how often?

Good answer: a named person, a visit frequency, and a communication channel where progress photos land. Red flag: "I personally look after every site" from a firm running ten projects. Ask to see the supervision log of a current project.

11. How do you handle changes I ask for mid-project?

Good answer: a written change-order process — cost and days quoted, approved by you, before execution. Red flag: "anything for you, we'll adjust". Unpriced changes surface as a lump of "extras" at handover, when your leverage is gone.

12. What does handover include, and what closes the project?

Good answer: a joint snag walk, a written snag list with a closure window of 1–2 weeks, deep cleaning, and the final 5–10% payable only after closure. Red flag: full payment due at installation, snags "on trust". The holdback is the only reason snag lists get finished.

The people and paper questions

13. Can I see two completed projects and speak to those clients?

Good answer: yes — including, ideally, a project a year old, because year-old woodwork tells the truth that handover photos cannot. Red flag: a portfolio of renders and stock-looking images with no reachable client. Renders are intent; sites are evidence.

14. Who owns the drawings, and what if we part ways midway?

Good answer: paid-for drawings are yours to keep and execute with anyone; exit terms state what is payable up to each stage. Red flag: drawings held hostage to execution. That coupling is how weak execution teams retain unhappy clients.

15. What warranty do you give, in writing, and who honours it?

Good answer: a stated period — commonly 1–10 years on woodwork in 2026, with hardware per manufacturer — plus who to call and typical response time. Red flag: "lifetime warranty" said aloud but absent from the contract. A warranty that is not written down expires at the last payment.

Using the fifteen

Do not interrogate one firm; compare three. Put the same fifteen questions to each shortlisted designer and the differences will do the judging for you — one firm's vague answer sounds fine until another firm answers the same question with a document. Build that shortlist from portfolios and verified profiles: browse interior designers in Bangalore or interior designers in Noida, pick three whose completed work matches your home's scale and style, and take this list to the first meetings.

Frequently asked questions

What should I ask an interior designer in the first meeting?

Prioritise four: what the fee includes and excludes, the stage-wise payment schedule, the exact brands and grades that will be installed, and who supervises the site how often. A firm that answers all four with documents — deliverables list, payment stages, specification sheet, supervision plan — is safe to go deeper with. Vague answers to any of the four rarely improve after signing.

How do I know if an interior designer is genuine?

Triangulate: completed projects you can visit or clients you can call, a written specification with named brands and grades, GST-billed invoicing, and drawings you own if you part ways. Verified marketplace profiles with real portfolios help you shortlist, but the year-old completed site is the strongest single credential — handover-day photos flatter everyone.

Is free interior design a red flag?

Usually. Design work costs real hours, so "free design" means the cost is recovered inside execution margins, and it means you cannot take the drawings elsewhere — removing your leverage to compare execution quotes. A transparent design fee, whether ₹40–150 per sq ft or a lump sum, keeps the design's value and ownership clean.

How much advance should I pay an interior designer?

Around 5–10% of project value at booking is reasonable, against a defined design deliverables list. Cumulative payments before material reaches your site should stay at or under 50%, and 5–10% should remain payable only after the snag list closes. Firms asking for 60% or more upfront are financing themselves on your risk.