Turnkey Interiors vs Design-Only: Which Is Better

Every Indian family that decides to do up a new flat or bungalow reaches the same fork early on. One path is to hire a designer only for the design — layouts, 3D views, drawings and a specification — and then engage a carpenter, an electrician, a false-ceiling contractor, a painter and a plumber separately. The other path is to hand the whole job to one firm, which designs, buys, builds and hands over the keys. The first is called design-only; the second, turnkey or design-and-build. Between them sits a third model, design plus supervision, in which the designer does not execute but visits the site to check the work.

The choice is usually made on a single number: design-only looks cheaper because the design fee is small and the contractors are paid directly. That comparison misses most of what matters. Design-only moves the coordination, the purchasing, the quality checks and the risk of mistakes onto the family; turnkey moves them onto the firm and prices them into the contract. Families who choose design-only to save money and then cannot visit the site end up paying in rework and months of delay; families who choose turnkey without an itemised quotation lose the ability to see what they are paying for.

This article lays the three models side by side: what each includes, who is responsible for what, how the money compares on a worked 3BHK example, how long each takes, what a design-only drawing package must contain, and what a turnkey contract must say. It is written from the designer's side of the table — Aaditya Interior has worked in all three models since 2014 — and its fee and cost figures are kept consistent with the fee and cost guides on this site. All figures are indicative October 2026 estimates and must be confirmed per project.

The three models, defined

In a design-only engagement the designer studies the brief and the site, prepares concept options and 3D views, and issues a set of working drawings and a material specification. The client then takes those drawings to contractors, obtains quotations, places orders and manages the site. The designer may answer questions by phone and visit once or twice, but is not responsible for how the work is executed. In design plus supervision, the designer additionally visits the site at agreed stages and at an agreed frequency, checks the work against the drawings, approves samples and helps resolve problems — but the contracts and payments for execution remain between the client and each contractor.

In a turnkey, or design-and-build, engagement one firm signs one contract with the client for both design and execution. It designs, prepares an itemised quotation, buys materials, manufactures or fabricates furniture (often in its own or a partner's factory), employs or subcontracts the trades, supervises the site and hands over a finished home, usually with a workmanship warranty. The design fee is often shown as a separate line, sometimes folded into the execution rates. The client deals with one party for cost, time and quality. Modular kitchen brands and online interior platforms are a variation of the turnkey model, with more standardised products and less site carpentry.

Where these models come from

For most of the twentieth century, Indian homes were finished the traditional way: a family engaged a mistri or a head carpenter on daily or contract rates, bought timber, plywood and hardware themselves from the local market, and supervised the work personally, often with an architect or an experienced relative advising on design. That arrangement is still common, and it is the ancestor of the design-only model: the design comes from one person, the making from many, and the family holds them together.

Construction worldwide recognises the same split in formal procurement routes. In design–bid–build, the traditional route, the owner hires a designer, then invites builders to price the finished drawings and contracts with the chosen builder separately. In design–build, the owner contracts one party for both. International standard forms reflect the difference — FIDIC, for instance, publishes separate conditions of contract for employer-designed works and for design-build works — and Indian infrastructure uses the turnkey idea at scale in engineering, procurement and construction (EPC) contracts. In home interiors, the turnkey model grew quickly in India as factory-made modular furniture, imported hardware and branded boards made it possible to price a whole home in advance, and as more families bought flats in cities far from their hometowns, with no time or network to manage trades themselves.

Who is responsible for what

The clearest way to compare the models is to ask, task by task, who answers when something goes wrong. In design-only, a wardrobe built 50 mm too wide for its alcove might be the designer's error, the carpenter's, or the result of a site change nobody recorded — and the client must work out which. In turnkey, the firm owns the outcome and must fix it. The matrix below sets out the usual allocation; any contract can change it, which is precisely why the allocation must be written down.

The money: one 3BHK, three routes

Fees and execution prices vary widely, so a fair comparison must hold the project constant. The worked example below takes a 1,250 sq ft (carpet) 3BHK finished to a mid-range specification — the band this site's 3BHK cost guide puts at about ₹15.5–22.5 lakh. It assumes the same materials and the same scope in every route, an execution cost of ₹18 lakh at direct contractor rates, and illustrative design fees in line with this site's fee guide. The figures are worked assumptions, not quotations; their purpose is to show where the money goes, not to predict any particular firm's price.

The result surprises many families: the totals land in the same band. Design-only is not automatically cheaper, because the costs it removes from the invoice — coordination, wastage control, rework, delay — do not disappear; they move to the family, partly as money and partly as time. Turnkey is not automatically expensive, because the firm's margin pays for work the family would otherwise do or pay for anyway. The real differences are elsewhere: transparency, control and who carries the risk. A design-only client sees every rupee and chooses every vendor; a turnkey client pays for certainty and one phone number to call.

Time: how long each model takes

Time is where the models differ most. A turnkey firm runs design, factory production and site work in parallel: while the civil, electrical and false-ceiling work proceeds on site, kitchen and wardrobe carcasses are being cut and edge-banded in the factory, so that installation can begin the day the site is ready. This site's 3BHK cost guide puts a mid-range home at about 10–16 weeks from design sign-off, plus 2–4 weeks of design. In design-only, the same activities happen in sequence and depend on the family: contractors must be found and compared after the drawings are ready, each trade waits for the previous one, and site carpentry is slower than factory production. Eighteen to twenty-six weeks is common, and longer if the family cannot visit the site often.

What a design-only package must contain

Design-only works only if the drawings are complete enough for a contractor to build from without guessing. A set of attractive 3D renders is not a design package; it is a picture. Contractors price and build from dimensioned plans, elevations and sections, from a specification that names materials and hardware, and ideally from a bill of quantities measured on a consistent basis — IS 1200, the Indian standard method of measurement for building works, is a useful reference for how quantities should be stated. Before paying a design-only fee, ask for a sample set from a previous project and check it against the list below.

Fig. 4 shows the level of detail that separates a buildable package from a mood board: overall size, shutter widths, plinth, loft height, rail height, shelf and drawer spacing, carcass material, shutter finish, gaps and hardware — all on one sheet, in millimetres. If every built-in unit in a home has a sheet like this, a competent carpenter can build it and a client can check it with a tape. If the package has only renders and a furniture layout, the carpenter will improvise, and the design-only fee will have bought very little.

What a turnkey contract must say

A turnkey contract concentrates risk on the firm, which is good for the client only if the contract is specific. The danger in turnkey is opacity: a single lump sum for the whole home hides the board grade, the hardware brand and the area measured, and every later question becomes a negotiation. The protections are well known. The quotation should be itemised unit by unit with dimensions, materials, finishes and rates; the specification should name brands and grades; payments should follow measurable progress; and variations, delays, warranty and exit should each have a clause. The checklist below applies to both models — the right-hand column shows what changes for turnkey.

Which model suits which family

No model is better in general; each suits a different family. The deciding questions are time, distance, experience, the complexity of the project and how much the family values control over certainty. The table below summarises the patterns Aaditya Interior sees most often. Where the answer is mixed, design plus supervision is usually the safest middle path: the family keeps control of contracts and costs, and a professional checks the work at the stages that matter.

Where the industry is heading

The line between the models is blurring. More design studios now offer a supervised-execution option through partner vendors, keeping the transparency of separate contracts while giving the client one programme. Turnkey firms are publishing more itemised quotations and material catalogues as clients compare them online. Factory production is moving more work off site, which shortens programmes and makes quality more consistent, while 3D walkthroughs and virtual-reality previews let families approve designs with more confidence before anything is cut.

On site, shared online trackers, photo reports and live cameras are making supervision possible at a distance, which helps families who live far away. Payment structures linked to verified milestones are becoming normal rather than exceptional. What will not change is the basic trade-off this article describes: someone must coordinate the trades, check the work and carry the risk of mistakes. The only real choice is whether the family does that itself, pays a designer to help, or pays one firm to own it.

Rules for choosing between turnkey and design-only

• Decide first how much time the family can spend on site each week; if it is less than two or three visits, rule out pure design-only.
• Compare like with like: design-only fees plus contractor quotes for the same drawings against a turnkey quotation for the same specification.
• In design-only, insist on a complete drawing set — dimensioned elevations of every unit, electrical and ceiling plans, and a specification.
• In turnkey, insist on an itemised quotation with sizes, materials, brands and rates, never a single lump sum.
• Tie every payment to measurable progress and keep a retention until the snag list is closed.
• Put the handover date, the delay remedy and the warranty in writing in any model.
• Visit one finished and one running site of the designer or firm before signing.
• If unsure, choose design plus supervision: control stays with the family, and a professional checks the work.

Frequently asked questions

What is a turnkey interior project?

A turnkey interior project is one in which a single firm designs and executes the whole interior under one contract — measuring, designing, buying materials, manufacturing furniture, managing trades and handing over a finished home, usually with a workmanship warranty. The client deals with one party for cost, time and quality.

Is turnkey more expensive than hiring a designer and contractors separately?

Not necessarily. The turnkey price includes the firm's coordination, overheads and margin, but design-only moves those costs to the family as time, wastage, rework and delay. On comparable specifications the totals are often close; compare itemised quotations for the same drawings before deciding.

What does a design-only interior designer provide?

Layouts, 3D views, working drawings — plans, electrical and ceiling layouts, dimensioned elevations of every unit and details — and a material specification, sometimes with a bill of quantities. Site visits are limited or excluded, and execution is the client's responsibility.

How much does a design-only interior designer charge?

Fees vary by firm, city and scope. Design-only is charged per square foot, as a lump sum or as a percentage of project cost, and is lower than design plus supervision; as an illustration, this site's fee guide cites about ₹250 per sq ft for design plus supervision and 8–12 per cent of project cost for percentage fees. Always confirm the area basis and the drawing list.

Which is better for NRIs or people living in another city?

Turnkey, in most cases, because nobody in the family can visit the site regularly. Insist on an itemised quotation, milestone payments with photo or video verification, a written handover date and a local representative to inspect at key stages.

Can a designer supervise the work without doing turnkey?

Yes. Design plus supervision is a common model: the designer visits at agreed stages, checks the work against the drawings and approves samples, while the client contracts and pays each contractor directly. It is the middle path between control and convenience.