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By Sumana Kumar•Aug 27, 2026•Decision Guides

Material Procurement on a Salt Lake Project: Who Buys What

Material Procurement on a Salt Lake Project: Who Buys What

Material Procurement on a Salt Lake Project: Who Buys What

Most of the arguments that break out on a Salt Lake site around month five are not really about design, they are about who was supposed to buy the vitrified tiles, whether the rate quoted in February still holds in June, and why a brand written into the drawings arrived at the gate as something else with a similar sounding name. Procurement is the point where a building project quietly becomes either a controlled spend or a running negotiation, and when it goes wrong the reason is usually not dishonesty, it is that nobody wrote down the split between client purchase and contractor purchase before the first truck turned up.

So this page is that split, written out. Which items a plot owner should buy in their own name, which items belong inside the contractor's rate, which items get specified early but should deliberately be ordered late, and what changes about all of it because the plot sits in a planned grid of blocks and sectors where the neighbours are commonly already built right up to the boundary, which means there is almost no spare ground to stack material on in the first place.

We are an architecture and interior design studio working out of New Town across the Salt Lake, New Town and Rajarhat belt, founded in 2014, with 330+ buildings delivered, and procurement comes up on nearly every project we run because the material schedule is part of the drawing set rather than a separate conversation held months later with whoever won the tender. Sumana Kumar stays on the project through sanction and through the finishing stages, so the person who specified a floor finish is the person standing there when the crates are opened, and that one fact changes how carefully the schedule gets written at the start.

Exterior of the Cypress House by Studio Contour in New Town, seen from the street

The three ways a Salt Lake project buys its materials

There are basically three ways the buying gets organised, and the choice sets everything that follows. In a labour rate contract the owner buys all the materials and the contractor is paid for labour and plant alone, which hands you complete control over brand and quality and complete responsibility for being reachable when deliveries land. In an item rate contract the contractor buys against a written specification and is paid per unit of finished work, so the price risk sits with him and the specification document becomes the only thing protecting you. In a lumpsum or turnkey contract one number covers everything, which is the easiest arrangement to sign and the hardest to audit, because once the specification is folded inside the rate there is nothing left to compare that rate against.

Most of the houses we design in Salt Lake end up on a hybrid of the first two, and that is a deliberate structure rather than a compromise. Materials where value is concentrated go to the owner, and the long tail of daily consumables goes to the contractor, because the real cost of owner purchase is not money, it is the number of decisions and site visits it demands of you over a year.

Item groupWho buys itWhy it sits there
Cement and reinforcement steelPlot ownerHigh value and the rate moves week to week
Sand bricks chips and consumablesContractorHundreds of small purchases made daily
Tiles stone sanitaryware and fittingsPlot ownerSubstitution becomes invisible once installed
Shuttering scaffolding and site waterContractorArrives with the labour and leaves with it
Windows doors and shuttersPlot owner on our scheduleOrdered on site measurements not on drawings

What the plot owner should buy in their own name

The test we use is simple. If an item is expensive, if its price moves month to month, and if a substitution becomes invisible the moment it is installed, the owner should buy it directly. Cement and reinforcement steel qualify on all three counts, right at the stage when the largest single block of the budget is going into the ground and the frame. Tiles, natural stone, sanitaryware and CP fittings qualify too, because nobody is lifting a laid tile to check its thickness later, and because the gap between a specified model and a cheaper cousin in the same family is real money once it is spread across a whole floor.

Electrical switches and wire, kitchen appliances and anything carrying a warranty card belong with the owner as well, for the plain reason that the warranty should stand in the name of the person who will live with the product. Our job on those items is to put the exact brand, series, size and finish into the schedule, so your purchase order has nothing left open to interpretation, and so two suppliers quoting the same line are genuinely quoting the same thing. Where a client wants vastu compliant design, orientation and the finish decisions that follow from it get settled at drawing stage, which again means the buying list is fixed before anyone is asked for a price.

What should stay inside the contractor's rate

Sand, bricks, stone chips, binding wire, nails, shuttering ply, centering, scaffolding, site water and the hundred small items consumed in a week should stay with the contractor. Trying to own these is how an owner loses a year of weekends, because the purchases are small, constant, and judged only by whether work can continue tomorrow morning. Wastage accountability is the other half of the argument, since a contractor buying his own sand has a reason to keep it covered through a wet week, while an owner supplying it has a stock register and a dispute.

Waterproofing is the interesting exception to the rule. The material belongs in the contractor's scope because it is applied in the same breath as the work around it, but the system, the brand, the number of coats and the detail at every junction belong in our drawings, and the payment for that item should be tied to a water test rather than to the material having been delivered.

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The equivalent clause is where budgets leak A quotation that names a branded item and then adds or equivalent has not really quoted that item at all, so the substitution decision has quietly moved from you to whoever is doing the buying.

What gets specified early and ordered late

A third category is specified in full at drawing stage and bought as late as the programme allows. Windows are the clearest case, because openings are built to drawings and then measured in reality, and a window ordered off the plan on a tight plot is a window that will be packed and filled to fit. Doors, wardrobe shutters, kitchen shutters and counter stone sit in the same bucket, and so does lighting, which should be confirmed after the false ceiling layout is final rather than guessed before it.

The catch here is that late ordering only works if the specification was early. Where the schedule exists from the beginning, buying late costs you nothing and saves you storage, breakage and the risk of a wet fortnight sitting on a pallet of shutters. Where it does not exist, late buying becomes panic buying at whatever the market happens to hold that week. We have written at more length on the window question in Window Selection for Salt Lake Homes: Aluminium, uPVC and Openable Types, on finishes in Tile Selection for Salt Lake Bathrooms and Balconies, and anyone planning full floors of finishing work will find the fuller picture in 4 BHK and Duplex Interior Design in Salt Lake. Fittings for wet areas are worth settling early on paper too, which is why bathroom design runs as its own schedule rather than as a line item.

What Salt Lake itself does to the material list

Salt Lake is a planned grid, right, and that geometry is the first thing that hits procurement. Plots are regular but tight, and because the neighbours are frequently built to the boundary on both sides, your side setback is light and air rather than a lay down yard. There is nowhere to park a month of material, so deliveries have to be staged against the work programme instead of bought in one lot for a better rate, and the bulk saving you were promised often disappears into double handling and breakage. Newer G+3 and G+4 rebuilds squeezed between houses from the sixties and the nineties make this sharper still, since the only working space is the one you are building on.

Weather is the second factor. A long humid stretch and a serious monsoon mean cement, ply, shutters and packed sanitaryware cannot wait in the open, and the sequence has to get the shell weathertight before finish materials come near the site. The third factor is the authority, since Bidhannagar Municipal Corporation handles building approvals for Salt Lake, also written Bidhan Nagar, while New Town falls to NKDA and Sector V runs as the separate commercial and IT belt. The utility sequence has its own timing that your buying programme has to respect, which we have set out in Water and Sewerage Connection Approval Under Bidhannagar Municipal Corporation in Salt Lake: A Plot Owner's Guide, and the ground floor retail case, common enough along the main sector roads, is covered in Bidhannagar Municipal Corporation Building Plan Sanction for a Mixed-Use Building With Ground-Floor Retail in Salt Lake. The wider area picture sits on our Salt Lake area page.

Where the money actually leaks

Three leaks account for most of the overruns we see. The first is the equivalent clause described above. The second is rate escalation on items bought many months after the quote was given, which is why cement and steel should be tied to a stated basis and a stated review point rather than assumed frozen for the life of the job. The third is reconciliation, basically the arithmetic between what was delivered, what went into the work and what is still in the store, which has to be agreed as a method at the start instead of argued about at the end.

Every option we put in front of a client carries its cost consequence attached, so the budget moves as the decision moves rather than being discovered three months later. Exact rates, statutory charges and fees vary by plot and have to be confirmed for your specific plot, and how the purchases are invoiced, along with what that does to your input credit, is properly a question for your own CA rather than for us.

When a turnkey contractor is the better answer for you

There are real cases where a turnkey contractor or a single brand package suits you better. If the job is one bathroom or one kitchen in an existing flat, if you are abroad and cannot be reached for sample approvals, or if a rental unit has to be finished to a predictable standard quickly, then one number and one point of contact beats the control you are handing over. The same holds when the budget ceiling matters more than the ability to compare options line by line.

Where that model stops working is scale and change. On a full house, or on a rebuild where structure, sanction and interiors all interact, the combined rate hides exactly the decisions that carry the most money, and the first design change exposes it, because there is no agreed unit rate to price the change against. At the end of the day the choice is between convenience and visibility, and on a long project visibility tends to be worth more.

Studio ContourA turnkey contractor
the material schedule is written before tendering so two quotes are compared on the same specificationthe specification sits inside one combined rate with nothing to compare it against
each option is presented with its cost consequence attached so you decidesubstitutions are decided by whoever is doing the buying
the principal architect stays on through sanction and the finishing stagessite calls move to whoever is available that day

How we run it, stage by stage

The sequence is the same on a new G+3 build and on an older Salt Lake house being reworked. The schedule is written alongside the sanction drawings, tenders go out on that identical schedule, owner purchase items get a brand confirmation and a physical sample approval before the first order, and the late ordered items wait for site measurements. The finishing programme is then written backwards from the handover date rather than forwards from whenever material happens to arrive.

Because architecture, interiors and the Bidhannagar route sit with one team, you are not carrying information between a drafting service, a contractor and a furniture vendor who each hold a third of the picture. Interior design across Salt Lake is scheduled in the same document as the shell. For an example of this category of work, see Frond House project in Salt Lake, and Verdant House project in Action Area II, New Town is an example of the same category on a different plot condition.

  1. 01Material schedule written with the sanction drawings
  2. 02Structure stage buying of cement steel and reinforcement
  3. 03Shell weathertight then site measurements taken
  4. 04Finishing stage ordering of tiles stone fittings and lighting
  • Ask which items sit inside the contractor's rate and which do not
  • Confirm brand series and model number against every specified item
  • Check whether an equivalent clause allows substitution without your approval
  • Get the wastage and reconciliation method in writing before the first order

Where to start

If you are close to appointing someone, the most useful thing you can do before signing anything is ask for the material schedule and see whether one exists. Send us the plot details, the block and sector, and whatever drawings or survey you already hold, and get in touch so we can walk you through where the buying split would fall on your specific plot and what that does to the programme.

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