1BHK Interior Design Cost: 400 and 500 sq ft Flats (2026)

A full 1BHK interior for a 400 to 500 sq ft flat costs roughly ₹3 lakh to ₹5.1 lakh at a budget level, ₹5.7 lakh to ₹8.8 lakh mid-range and ₹8.9 lakh to ₹13 lakh for premium, before GST, priced line by line for 450 sq ft of carpet area. Add a design fee, a contingency and 18 per cent GST and the amount you actually pay is closer to ₹3.9 to ₹7.3 lakh, ₹7.4 to ₹12.7 lakh and ₹11.5 lakh upwards.

How big is a 1BHK, and why carpet area matters

Design Cafe puts a typical 1BHK at 450 to 650 sq ft of carpet area, closer to 400 sq ft in older buildings and up to 700 sq ft in newer ones with balconies (Design Cafe). Our worked example is 450 sq ft of carpet area: a living and dining room, a bedroom, a kitchen and one bathroom. Work from carpet area, the floor inside your walls, not the super built-up figure, as our carpet, built-up and super built-up explainer shows.

1BHK interior design cost at a glance

	Budget	Mid	Premium
Works, line by line (before GST)	₹3 to 5.1 lakh	₹5.7 to 8.8 lakh	₹8.9 to 13 lakh and up
With design fee, contingency and 18% GST	about ₹3.9 to 7.3 lakh	about ₹7.4 to 12.7 lakh	about ₹11.5 to 19 lakh
All-in, per sq ft of carpet area (450 sq ft)	about ₹870 to ₹1,630	about ₹1,640 to ₹2,820	about ₹2,570 to ₹4,160

The all-in row assumes a design fee of 5 to 12 per cent and a contingency of 5 to 10 per cent of the works, the ranges in our room-by-room guide, with GST at 18 per cent on the lot. Packages that include design, like Livspace's, lower that figure. Published totals sit in the same bands: Design Cafe puts a mid-range 1BHK at ₹5 to 7 lakh, and Livspace's three room-by-room 1BHK totals come to ₹6.1 lakh, ₹7.6 lakh and ₹10.8 lakh for 400 to 600 sq ft, including its design fee (Livspace).

1BHK interior cost, line by line

Figures are in lakh, before GST, for the 450 sq ft example.

Line	How it is priced	Budget	Mid	Premium
Kitchen	Per running ft of base and wall cabinets	1.1 to 1.5	1.5 to 2.2	2.2 to 3
Wardrobe ×1, 54 sq ft of shutter with loft	Per sq ft of shutter: ₹1,200 to 1,500 / ₹1,500 to 2,000 / ₹2,000 to 2,400	0.65 to 0.8	0.8 to 1.1	1.1 to 1.3
Living: TV unit, shoe rack, seating	Per unit	0.5 to 0.8	0.8 to 1.5	1.5 to 2.5
Bedroom: bed, side tables, study	Per piece or unit	0 to 0.6	1 to 1.5	1.5 to 2.5
False ceiling: up to 150 / 280 / 350 sq ft covered	Per sq ft of ceiling: ₹70 to 110 / ₹110 to 150 / ₹150 to 185	0 to 0.15	0.3 to 0.4	0.5 to 0.65
Electrical and lighting	Per point, plus fittings	0.15 to 0.3	0.3 to 0.5	0.5 to 0.8
Painting, about 1,400 sq ft of wall and ceiling	Per sq ft painted	0.18 to 0.28	0.3 to 0.45	0.5 to 0.75
Bathroom ×1	Per bathroom: ₹40,000 to 70,000 / ₹0.7 to 1.1 lakh / ₹1.1 to 1.5 lakh	0.4 to 0.7	0.7 to 1.1	1.1 to 1.5
Total works		3 to 5.1	5.7 to 8.8	8.9 to 13

Kitchen

Priced by running foot of cabinets, with the countertop, chimney and hob often listed separately. Design Cafe gives ₹1.2 to 3 lakh for a 1BHK modular kitchen, with a typical budget around ₹1.5 lakh; Livspace's 1BHK kitchens come to ₹1.12 lakh, ₹1.29 lakh and ₹2.13 lakh across its three levels. We split that span across the tiers. Fewer running feet cost less, as our kitchen layouts guide explains.

Wardrobe

Priced per sq ft of shutter face, and the loft counts. Our 54 sq ft is an assumption: one 6 ft wardrobe, 9 ft high with its loft. HomeLane prices wardrobes in Thane at ₹1,500 to ₹2,400 per sq ft (HomeLane), and our earlier guide used ₹1,200 to ₹2,200 for hinged laminate; we split ₹1,200 to ₹2,400 across the tiers. The result matches Design Cafe's ₹60,000 to ₹1.2 lakh for one wardrobe, with a loft adding about ₹15,000. In a narrow bedroom, sliding shutters save swing space but cost more, as our wardrobe guide explains.

Living room and bedroom furniture

Design Cafe prices the living area (TV unit and seating) at ₹70,000 to ₹1.5 lakh, and the bedroom (bed, side units, a compact study) at ₹1 to 2 lakh, with a storage bed adding ₹20,000 to ₹35,000. Our budget tier assumes a TV unit and shoe rack, with the sofa and bed you already own; premium is our allowance for custom pieces, above Design Cafe's top end.

False ceiling, electrical and painting

Ceiling is priced per sq ft of ceiling covered. NoBroker gives ₹70 to 110 basic and ₹110 to 185 premium (NoBroker); Design Cafe gives ₹25,000 to ₹60,000 for a whole 1BHK. Our tiers cover nothing or the living room only, then the living room and bedroom, then every room but the bathroom.

Electrical has no published 1BHK figure that we could find. NoBroker's 3BHK figures are ₹50,000 to ₹90,000 for wiring and ₹90,000 to ₹1.5 lakh for lights, switches and fittings; we scaled those to roughly a third, for a flat with roughly a third of the rooms. Treat this line as our allowance.

Painting comes straight from Asian Paints' 1BHK example: a flat of 450 to 600 sq ft carpet has about 1,400 to 1,800 sq ft of paintable surface, costing ₹18,000 to ₹28,000 in economy paint, ₹30,000 to ₹45,000 in standard emulsion and ₹50,000 to ₹75,000 for a premium finish (Asian Paints).

Bathroom

One bathroom, using NoBroker's three per-bathroom bands. A new flat's bathroom is usually tiled already; retiling, waterproofing or moving plumbing is civil work and needs the society's permission.

1BHK interior design for 400 sq ft and 500 sq ft

The kitchen, bathroom and furniture cost about the same at 400 or 500 sq ft. What grows is the ceiling, the painted surface and often the wardrobe. On the same mid-tier scope, at midpoint rates:

Mid tier, midpoints (illustrative)	400 sq ft	500 sq ft
Kitchen, living, bedroom, electrical, bathroom	₹5.55 lakh	₹5.55 lakh
Wardrobe: 6 ft (54 sq ft) / 7 ft (63 sq ft) of shutter at ₹1,750	₹0.95 lakh	₹1.1 lakh
False ceiling: 250 / 310 sq ft at ₹130	₹0.33 lakh	₹0.4 lakh
Painting: about 1,250 / 1,550 sq ft at ₹23	₹0.29 lakh	₹0.36 lakh
Total works, before GST	about ₹7.1 lakh	about ₹7.4 lakh
Per sq ft of carpet area	about ₹1,780	about ₹1,480

The extra 100 sq ft adds about 4 per cent to the bill, while the rate per sq ft drops by a sixth. That is why a single per-sq-ft rate is a poor way to compare quotes for small flats.

How this compares with our per-sq-ft bands

Our room-by-room interior cost guide and our Mumbai, Bangalore and Pune 2BHK guides use per-sq-ft bands of ₹1,000 to 1,500, ₹1,500 to 2,500 and ₹2,500 and up. On 450 sq ft, those give ₹4.5 to 6.75 lakh, ₹6.75 to 11.25 lakh and ₹11.25 lakh upwards. Our line-by-line build sits slightly lower before GST and higher once fee, contingency and GST are added, so for a 1BHK the two broadly agree:

• Small flats carry fixed costs. A kitchen, a bathroom and a wardrobe are spread over few square feet, so the per-sq-ft rate is high, as the room-by-room guide itself says.
• The bands are broad market observations, not tied to a dated source, and do not say whether GST is in. Use the table, not a single rate. Design Cafe's ₹1,000 to ₹1,400 per sq ft for a 1BHK and Livspace's ₹1,650 for an essential scope, including its fee, fall inside them.

What fits a small budget: built-in vs loose furniture

Built-in work (kitchen, wardrobe, TV unit, shoe rack, a fitted study) is priced per running foot, per sq ft of shutter or per unit, and stays with the flat. Loose furniture (sofa, dining set, bed) is priced per piece, moves with you and, as Design Cafe notes, is excluded from most quotations, so budget for it separately.

What ₹3 to 5 lakh buys

Design Cafe's essentials 1BHK package, at ₹3.5 to 5 lakh, is a kitchen, one wardrobe and a TV unit in MDF or commercial plywood with laminate, and no false ceiling. Its mid-range package, ₹5 to 8 lakh, adds a bed, dining seating, ceiling work in the living area and better hardware. Its advice for a tight budget:

• Spend on the kitchen and wardrobe first, and use plywood where it matters.
• Skip or defer the false ceiling, and keep the builder's flooring if it is in good condition.
• Leave the TV unit or bed for a later phase.

Our view: if you rent or expect to move soon, favour loose pieces you can take with you. If you own the flat, built-in storage to the ceiling earns its cost every day.

Multi-use pieces that replace a unit

Space-saving furniture costs more per piece but can remove the need for another unit: a storage bed in place of a chest of drawers, a wall-mounted table in place of a dining set, a sofa-cum-bed for guests (Design Cafe). Our small apartment trends guide has more 1BHK ideas: rooms with two jobs, storage walls and lofts, sliding partitions and compact kitchens.

1BHK interior package or itemised quote?

A package usually means woodwork plus a fixed list of items. Design Cafe's packages are built around the kitchen, wardrobe and TV unit; Livspace's standard scope adds civil work, loose furniture, a pooja unit, false ceiling, electrical, painting, curtains and decor at about ₹1,841 per sq ft. Before comparing a package with an itemised quote, list what each includes line by line against our table. Painting, electrical, the bathroom and loose furniture are the lines most often missing.

1BHK interior cost in Mumbai

Design Cafe's Mumbai guide, published in January 2026, puts a basic 1BHK interior at ₹4 to 4.5 lakh and a premium one at ₹6 to 6.5 lakh (Design Cafe Mumbai). The basic list is a kitchen, a basic TV unit, a small shoe rack, a wardrobe with loft, a double bed and laminate finishes; premium adds panelling, a dresser, a vanity and a foyer unit. It says materials, labour and transport cost more in Mumbai than in many other cities, and it does not state a carpet area.

Those totals fall within our budget and mid tiers. For painting, Asian Paints gives ₹15 to 40 per sq ft for interior work in Mumbai. If you live in a co-operative housing society, check its bye-laws before any civil work; our Mumbai 2BHK cost guide explains what needs the committee's permission. For Pune and Bangalore we found no current published 1BHK figure we could verify, so price the lines above with local quotes.

GST and design fees on a 1BHK quote

A turnkey interior, where the firm supplies materials and fits them into your flat, is a works contract: the GST law defines one as a contract for fitting out, improvement, renovation or alteration of immovable property in which goods pass to the client. The general rate for such contracts is 18 per cent (GST Council, works contract services). On the diagram's mid example, GST alone is about ₹1.5 lakh. Design Cafe lists GST among exclusions "if quoted separately", so ask.

A separate design fee also attracts 18 per cent. Our designer fees guide compares per-sq-ft, percentage and lump-sum fees. Livspace includes its fee in its prices.

How long a 1BHK interior takes

Design Cafe gives 25 to 35 days for factory-made modular work, from final design approval to handover, about two weeks more for civil work, and up to six weeks for design if decisions come quickly. Society limits on working hours and lift use can add time.

1BHK interior quotation checklist

1. Area: the quote names carpet area, and any per-sq-ft rate says which area it uses.
2. Units and quantities: kitchen in running ft, wardrobe in sq ft of shutter including the loft, ceiling in sq ft covered, painting in sq ft painted, electrical as a count of points.
3. Materials named: board type and grade, laminate make, hardware brand, paint product and coats; kitchen countertop, sink, chimney and hob marked in or out.
4. Loose furniture: listed separately with a price per piece, so you can buy some yourself.
5. Exclusions in writing: mattress, curtains, appliances, civil work, debris removal, society deposits. Keep 5 to 10 per cent aside for site surprises.
6. GST: a separate line at 18 per cent, including on the design fee.
7. Timeline and payments: milestones, with 5 to 10 per cent held back until the snag list is closed.
8. Warranty: whose warranty covers workmanship and whose covers hardware, and for how long.

Before you ask for quotes, try MOA's free home cost calculator: its interiors option prices the kitchen by size and shape and wardrobes by shutter area.

Frequently asked questions

What is the 1BHK interior cost per square foot?

About ₹670 to ₹1,130 per sq ft of carpet area for budget works and ₹1,270 to ₹1,960 for mid, before GST, in our 450 sq ft example. Design Cafe gives ₹1,000 to ₹1,400 for a 1BHK. Smaller flats have higher rates because the kitchen and bathroom cost the same.

Can I do a 1BHK interior in ₹3 lakh?

Only a focused scope: a laminate kitchen, one wardrobe, a TV unit and painting, keeping your existing furniture and skipping the false ceiling. Design Cafe's essentials package starts at ₹3.5 lakh.

What is the 1BHK interior cost in Mumbai?

Design Cafe puts it at ₹4 to 4.5 lakh basic and ₹6 to 6.5 lakh premium. Expect GST on top if it is quoted separately.

Is a 1BHK interior package cheaper?

Often, because it covers less. Compare its item list with an itemised quote, line by line.

Finished small homes tell you more than a brochure. Find an interior designer on MOA, filter by city, and look at their compact-home projects before you compare quotes. In Mumbai, start with our guide to Mumbai studios on MOA.

Sources

• Design Cafe: Smart Spending, 1 BHK Interior Design Costs Deciphered (published 17 Sep 2026; accessed 21 Oct 2026)
• Design Cafe: Decoded, Interior Design Costs in Mumbai for Every Home Type (published 27 Jan 2026; accessed 21 Oct 2026)
• Livspace: Average cost of a 1 BHK flat interior design (published 21 Jul 2026; accessed 21 Oct 2026)
• NoBroker: 3 BHK Interior Design Cost in Pune 2026, Complete Price Guide (published 7 May 2026; accessed 21 Oct 2026)
• HomeLane: Popular Wardrobe Designs in Thane (accessed 21 Oct 2026)
• Asian Paints: Painting Cost Per Sq Ft in India (accessed 21 Oct 2026)
• GST Council: Works contract services, levy of tax at a glance (accessed 21 Oct 2026)
• Design fee and contingency ranges, retention and per-sq-ft bands from MOA's room-by-room interior cost guide