Tendering & comparing quotes (BOQ)
Three quotes against one Bill of Quantities — because the cheapest is usually the dearest once the substitutions and 'extras' arrive.
The ₹42 lakh quote finished at ₹54 lakh. The ₹48 lakh one finished at ₹49 lakh.
Two contractors bid the same house. The owner picked the cheaper one, naturally — and spent the next year approving 'extras' the low quote had quietly left out: the waterproofing, the better tile, the boundary wall, the steel that 'cost more now'. The dearer bidder had simply priced the whole job honestly. The cheapest quote is rarely the cheapest house. The only way to know which is which is to make every contractor price the exact same thing.
One document fixes everything: the Bill of Quantities
A BOQ turns three guesses into three comparable prices
A Bill of Quantities (BOQ) is a line-by-line list of every measured item of work in your house — so many cubic metres of concrete, square metres of brickwork, square metres of plaster, running metres of skirting, number of doors of a stated specification. Your architect or a quantity surveyor prepares it from the working drawings.
Give the same BOQ to every contractor and ask each to fill in only the rate against each line. Now their quotes are like-for-like: a clean column-by-column comparison where the totals mean something, because everyone has priced identical quantities and identical specifications.
Without a BOQ, three contractors price three different houses in their heads — one assumes vitrified tile, one assumes ceramic, one forgets the compound wall — and the cheapest 'total' is simply the one that left the most out. Aim for three quotes, never one, and never against a vague one-line 'build my house for ₹X'.
A quote without a BOQ isn't a price — it's a starting position, and the gaps are where the extras live.
Read the rate analysis: why one line is cheap tells you more than the total
Lay the three filled BOQs side by side and compare rate by rate, not just the bottom line. Rate analysis is simply asking what makes up a rate — material, labour, wastage, the contractor's overhead and profit — so you can see why one bidder's plaster is 20% below the others.
A suspiciously low line usually means one of three things: they've assumed a cheaper material than you specified, they've under-measured, or they intend to make the money back later through variations. Probe it. Ask, in writing, what brand and grade each rate assumes.
Then weigh more than price: the contractor's completed projects you can visit, their financial stability (can they fund material before your next payment?), and how clearly they answer hard questions. The lowest bid is the right choice only when it's genuinely pricing the same scope to the same standard. Often the middle quote, fully honest, is the cheapest house you'll actually build.
Never compare two contractors on their totals alone — it's the single most expensive mistake at this stage. Insist your architect issues a written BOQ and make every bidder price the same one. When a quote is far below the others, treat it as a warning, not a win: ask exactly what material and brand each low line assumes. And always visit at least one finished house each contractor built, and one they built two years ago, to see how the work ages.
Issue a measured BOQ with a clear specification and material schedule, and tender to at least three pre-qualified contractors on identical documents. Build a comparison sheet that flags rate outliers line by line, not just the gross total, and normalise for any qualifications bidders attach. Recommend on value and capacity, not lowest price — and record the basis of selection so the choice is defensible if the client later questions it.
Tendering is how design intent survives contact with the market. The BOQ is the bridge between your drawings and a price: ambiguous quantities or loose specifications transfer pricing risk and invite claims. Learn to read a rate analysis — material, labour, wastage, overhead, profit — and you'll understand why two contractors price the same drawing differently, and how 'lowest bid' selection produces the claims and variations that dog under-specified jobs.
“Get a few quotes and pick the cheapest one — they're all building the same house anyway.”
Only if you forced them to. Without one shared Bill of Quantities, each contractor prices a different house in their head, and the lowest total is usually the one that excluded or down-specified the most. The 'cheapest' quote routinely finishes 15–30% over its number through extras and substitutions. Compare like-for-like against a BOQ, or you're not comparing prices at all.
Run a fair tender, not a guessing game:
- 01Ask your architect for a written BOQ from the working drawings, with a material schedule naming brands and grades — this is the document every contractor must price.
- 02Send the identical BOQ to at least three pre-qualified contractors and ask each to fill in rates only. Then build a simple comparison sheet, one row per BOQ line, one column per bidder.
- 03Circle every rate that's more than ~15% above or below the others and ask that contractor, in writing, what brand, grade and method the rate assumes. The cheapest line is often the most revealing.
Comparing quotes isn't about collecting numbers — it's about ensuring those numbers describe the same building, to the same standard. The Bill of Quantities is the one document that makes that possible, and rate analysis is how you read between its lines. Do this properly and the cheapest quote stops being a trap and becomes information you can actually trust.
Get three quotes, never one, all priced against a single Bill of Quantities so they're like-for-like. Compare rate by rate, not just totals, and interrogate any line ~15% off the others. The cheapest quote often finishes 15–30% over through extras — the honest middle bid is frequently the cheapest house.
What is a Bill of Quantities (BOQ) in house construction?
A BOQ is a line-by-line list of every measured item of work in a building — quantities of concrete, brickwork, plaster, flooring, doors and so on — prepared from the drawings. Every contractor fills in a rate against the same items, making their quotes directly comparable. It's the document that turns vague estimates into a fair, like-for-like tender.
How many quotes should I get before hiring a contractor in India?
Aim for at least three quotes from pre-qualified contractors, all priced against the same Bill of Quantities and specification. Three gives you a meaningful range to spot outliers, while keeping the tender manageable. Comparing fewer risks a skewed price; comparing them on different scopes is worse than not comparing at all.
Why is the cheapest construction quote often the most expensive?
Because the lowest total usually excludes items, assumes cheaper materials, or under-measures — gaps that resurface as 'extras' and variations during the build, often pushing the final cost 15–30% over the quote. A quote priced honestly against a full BOQ may look dearer on paper but finishes closest to its number, making it the cheaper house overall.
You've chosen a contractor and a fair price. Now you have to lock both into a document that survives the year ahead — a contract that fixes scope, payments, penalties and what happens when things change.