Two apartments on the same floor of the same building. Same square footage. Same basic layout. One interior project costs Rs. 18 lakh. The other costs Rs. 36 lakh. Both results look good. Both clients are satisfied. The same design studio did both.

This is not unusual. Interior project costs for the same size of space can vary by a factor of two or three, and sometimes more, depending on a set of factors that have nothing to do with how large the home is. Understanding what actually drives the cost is useful both for setting realistic expectations and for making informed choices about where in your budget to put the emphasis.

Material specification: the single largest variable

Material choice drives more of the cost difference between two similar projects than any other factor. Consider floor finishes alone. A good-quality ceramic floor tile in a standard size costs roughly Rs. 40 to Rs. 80 per square foot. A large-format vitrified tile from a premium manufacturer costs Rs. 120 to Rs. 200 per square foot. Natural marble or imported stone can run Rs. 350 to Rs. 800 per square foot or more, depending on the variety and the finish. On a 1,200 square foot home, the difference between the lowest and highest floor option alone is Rs. 3.7 lakh to Rs. 8.6 lakh, before installation labour.

Multiply this logic across kitchen shutters, wardrobe finishes, wall treatments, ceiling materials, hardware, and sanitaryware, and the cumulative difference becomes very large. A home where every material decision is made at the premium tier is a fundamentally different cost proposition from one where mid-range materials are used throughout, even when the floor area is identical.

Joinery: standard versus custom

Kitchen cabinets, wardrobes, study units, and TV panels are among the most significant cost items in any interior project. The difference between standard modular joinery with laminate shutters and fully custom joinery with lacquered or veneered shutters, soft-close mechanisms, integrated handles, and bespoke heights and configurations is substantial. A modular kitchen for a medium-sized kitchen in India currently costs roughly Rs. 1.5 to Rs. 2.5 lakh. A fully custom kitchen in the same space with premium shutters, quartz or stone countertops, and designer hardware costs Rs. 4 to Rs. 8 lakh. Both are kitchens. The daily experience of using them is quite different.

False ceilings, lighting, and electrical

A basic gypsum false ceiling with standard downlights is a modest cost item. A layered false ceiling with cove lighting, integrated LED channels, step details, and a mix of accent and task lighting costs significantly more, both for materials and for the electrical work required to run and control it. Clients who want lighting flexibility, the ability to shift from a bright working light to soft ambient light with a switch, should budget for it specifically rather than expecting it to be included in a standard fit-out rate.

Site conditions that are invisible until the work starts

The condition of the existing space affects the cost of the new fit-out. A site with old plaster in poor condition, outdated electrical wiring that needs full replacement, or plumbing that requires significant re-routing costs more to bring to the standard required for a new interior than a structurally sound site with modern services. These costs are not always visible before the site is opened up, which is one reason a contingency buffer is important on every project.

Access also matters. A site in a high-rise building with a small lift requires smaller material deliveries and more trips, which adds time. A site in a gated community with restricted working hours has fewer productive hours per day. These factors affect execution cost rather than material cost, but they are real and they compound.

A side-by-side comparison: same size, different costs

Consider two 1,500 square foot homes. Home A uses standard laminate shutters throughout, ceramic flooring, a basic false ceiling with downlights, and mid-range sanitaryware. Total cost: approximately Rs. 1,200 per square foot, or Rs. 18 lakh. Home B uses lacquered shutters, large-format vitrified flooring, a layered false ceiling with cove lighting, stone countertops in the kitchen, and premium fixtures throughout. Total cost: approximately Rs. 2,400 per square foot, or Rs. 36 lakh. Same size. Double the cost. Very different results in the living of them.

How to compare two quotes fairly

If you receive two quotes for the same project and one is significantly lower than the other, the useful question is not why the expensive one is high, but what the cheaper one has excluded. Ask for a line-by-line material specification in both cases. Ask what grade of material is assumed for each item. Ask whether furniture is included or additional. Ask whether the professional fee is inside the quoted number or separate.

A quote that looks attractively low at the start of a project often reflects either a lower specification or a cost structure that will accumulate variation orders once work begins. Neither serves the client well. The most useful basis for comparison is a clear, detailed scope document on both sides, so you are comparing equivalent things.

If you have a quote you would like a second perspective on, or want to understand what the right budget looks like for your project, speak to us at VOAD. We are happy to have that conversation before you make any commitment.