Design Studio vs Turnkey Contractor: How Handover Actually Differs

Ask two firms to quote for the same Bengaluru three-bedroom and you may get proposals that read almost identically — the same room list, similar renders, comparable numbers. What the proposals will not tell you plainly is the thing that determines your experience for the next few years: who employs the people who will physically build it.

That single question separates the two models, and everything else in this article follows from it.

What the two models actually are

A design studio sells design and, usually, coordination. It produces the layout, the drawings, the material palette and the specification. The physical work is done by carpenters, electricians, plumbers, painters, glass fitters and stone fabricators who are not the studio's employees. The studio may recommend them, may schedule them, may even bill through them — but the trades are separate entities. The studio's core deliverable is a design that works and a specification that is correct.

A turnkey execution contractor sells a finished, working flat. It may or may not do the design. What defines it is that the trades are the contractor's — in-house, or engaged and paid by the contractor under the contractor's supervision. The contractor's deliverable is not a drawing set; it is a room you can use, with the defects closed.

Neither model is a scam and neither is automatically better. They allocate risk differently, and the right choice depends on what you are building and how much coordination you are willing to own.

Where the studio model genuinely works better

Be honest about this before reading the criticism. The studio model suits some projects well:

• When the design problem is the hard part. An unusual layout, a difficult level change, a heritage or duplex conversion, a strong aesthetic point of view — a studio that specialises in resolving spatial problems earns its fee on the drawings alone.
• When you already have trades you trust. Owners who have built before, or who come from construction, often have a carpenter and an electrician they have used for years. They do not need a contractor; they need a designer.
• When you want to buy the trades directly. Separating design from execution lets you tender the build against a specification, which is a legitimate way to control cost — provided you accept the coordination job that comes with it.
• When you will be present. Someone has to hold the sequence together. If that someone is you, on site, regularly, the model works.

What all four have in common is that the owner is willing and able to carry coordination risk. That is the price of the model, and it is worth paying in the right circumstances.

Who carries execution risk

Execution risk is the risk that the built thing does not match the specified thing, or does not work. Bad measurement, wrong board grade, a hinge line that drifts, a wet-zone cabinet that swells, a shutter that fouls the beam nobody surveyed.

In the turnkey model, that risk sits with the contractor by construction. The contractor measured, the contractor bought the board, the contractor's fitter hung it. There is nowhere to send it.

In the split model, execution risk is distributed and therefore, in practice, often lands on the owner. The typical failure is not fraud — it is a gap. The studio specified IS 710 BWP marine plywood for the sink cabinet. The carpenter's supplier was short and sent something else. The studio's contract covers design, not procurement supervision. The carpenter's obligation was to build the cabinet, and he built it. Nobody lied. The cabinet is still wrong, and it will swell.

The mechanism to watch for is this: every boundary between contracts is a place a defect can sit without an owner. The more separate contracts, the more boundaries.

What actually happens at handover

This is where the models diverge most visibly, and where owners are most often surprised.

In the turnkey model, handover is a single event with a single counterparty. There is one snag list covering everything — joinery, electrical, plumbing, paint, glass, hardware. One party walks it with you, one party owns every open item, and one party's final payment is held against closing them. If a drawer fouls a wardrobe shutter, it does not matter whether the cause is the carcass or the channel; it is one line on one list.

In the split model, handover is not really an event. Each trade finishes, packs up and leaves at a different time. The carpenter completes and goes to his next site weeks before the painter finishes. The studio's involvement typically ends at a design sign-off — that the built work matches the drawings — not at a functional sign-off that everything works. There may be no single moment where anyone certifies the flat as complete, and no single list against which anyone is held.

The practical consequence: in the split model, snags get resolved trade by trade, and each trade has already been paid. The leverage that makes a turnkey snag list work — a retained final payment — is fragmented across parties who each consider their part done.

Six months later: the shutter warps

Run the real scenario. It is the following monsoon. A wardrobe shutter has bowed, or a kitchen base unit near the sink has swollen at the bottom edge, or a soft-close hinge has stopped closing softly.

Turnkey: you call the contractor. Diagnosis and remedy are both theirs. Whether the cause was the board grade, the edge banding, a plumbing leak from the trap above, or humidity in an unventilated utility, working it out is their job. If it falls inside the agreed defect period, they fix it. Your involvement is one phone call.

Split: you have to identify the cause before you know whom to call — and the parties have opposing interests in that diagnosis. If the board grade was wrong, that is a procurement failure and the carpenter's. If the specification called for the wrong grade in a wet zone, that is the studio's. If it swelled because a concealed plumbing joint has been weeping behind the unit, that is the plumber's. Each will reasonably point at the other, and none of them is necessarily acting in bad faith. You are now the person who has to adjudicate a technical dispute about your own kitchen.

This is the specific coordination risk the studio model leaves with the owner. It is invisible at signing and expensive at failure.

How to tell which model you are actually buying

Firms in both models describe themselves in similar language. "End to end", "turnkey", "single point of contact" and "we handle everything" are marketing phrases, not contractual structures. Read the contract instead, and ask direct questions:

• Who employs the carpenters, electricians and plumbers on my site? If the answer is that they are empanelled partners, associated vendors, or a network, you are in the split model regardless of what the brochure says.
• Who buys the material, and whose name is on the invoice? If you are paying suppliers directly, you own procurement risk — including substitution.
• Is there one contract or several? Count the counterparties. Each one is a boundary.
• Who signs the snag list closed, and what payment is held against it? If no payment is retained against snag closure, the snag list is a courtesy, not an obligation.
• Who do I call twelve months from now, and what does their contract oblige them to do? Ask for the answer in writing. Vague warranties that do not name a party are not warranties.
• Who is responsible if the built work deviates from the specification? In the split model this frequently has no clear answer — which is itself the answer.

A useful test: ask what happens if a specified item is unavailable mid-project. A turnkey contractor should have a substitution rule — nothing is swapped without written approval. In a split arrangement, ask who is contractually obliged to notice the substitution at all. Very often, nobody is.

We set out the same comparison in more detail on our studio versus execution contractor page, including what each model expects from the owner.

The Bengaluru wrinkle

The substance above is universal, but apartment stock in Bengaluru sharpens it in two ways.

First, most work happens in occupied societies with active association rules — working-hour windows, service-lift booking, debris removal schedules, restricted weekend or festival working, worker gate passes. These constraints do not care how many contracts you have; they compress the working window for everyone. In the turnkey model, sequencing trades inside that window is the contractor's problem. In the split model it is yours, and it is the point at which many owners discover that coordination is a real job. A carpenter who cannot get the service lift on the day he planned to load panels does not wait — he goes to another site, and comes back when he is free, not when you need him.

Second, a lot of Bengaluru stock is builder-finished to a similar standard, which means the differences between flats live in the details a specification governs: board grade in wet areas, edge banding quality, hardware. Those are exactly the details that go wrong at a contract boundary.

A reasonable way to decide

Choose the studio model if the design problem is genuinely hard, you have trades you trust or intend to tender the build yourself, and you will be present enough to hold the sequence together. Accept, going in, that coordination and post-handover diagnosis are yours.

Choose the turnkey model if you want a single party accountable for both the specification and the built result, if you will not be on site often, or if you are managing the project remotely. The trade-off is that you are buying design and execution from one firm, so you should scrutinise both — ask to see the itemised BOQ before you commit, because in a turnkey contract the BOQ is the specification, the price and the accountability document all at once.

At AlcorOne the split is deliberate and named: cost estimation and the itemised BOQ sit with Gogineni Kalyaan Kumar, and delivery — site survey, vendor sequencing, on-site supervision, snag closure and handover — sits with Pradeep Kumar Vasadi. A typical apartment fit-out runs 12–14 weeks, and for that whole window there is one party to call. Whichever model you choose, insist on knowing which named person owns delivery. If nobody does, that is the model answering your question.

Standards, regulatory registries, and manufacturer references that back the material grades, pricing framework, and compliance points in this guide:

• BIS IS 710 — Marine (BWP) grade plywood
• BIS IS 303 — Plywood for general purposes (MR/BWR)
• Karnataka RERA — project registry