You send the same item list to three firms. Kitchen cabinets, three wardrobes, TV console, shoe cabinet, two bathrooms retiled, full rewire, painting throughout — down to the dimensions.
Quote A: $41,000. Quote B: $52,000. Quote C: $59,000.
The instinct is to assume A is a bargain or C is greedy. Usually neither is true. Before you reward the lowest number, it is worth understanding what you are actually comparing, because most of the time you are not comparing the same thing at all. The spread comes from six mechanics, and most of them do not appear anywhere on the page you are reading.
1. The same word can mean two different products
The trap is assuming an item on the list is identical across every quote. It rarely is. Carpentry is the clearest example.
Traditional carpentry is built piece by piece — panel by panel, joint by joint — to fit your space exactly. Modular carpentry is assembled from standardised, pre-made units. Both are "carpentry." Both land on the quote as a single line. But the materials, the joinery, the hardware, the finish and the lifespan can be worlds apart, and so is the price.
That is not one designer being greedy and another being generous. It is two genuinely different products wearing the same name.
2. The board is not the same board
Carpentry is the largest line in almost every Singapore renovation. It is also the only line you cannot inspect after installation. Once the doors are on, the carcass is invisible for the next fifteen years. That is precisely why it is where price gets made.
Three variables move the number, and none of them are usually written down.
- Carcass thickness. 18mm plywood is the sensible baseline for anything load-bearing — kitchen bases, wardrobe frames, shelving that will hold books. 15mm is acceptable for top-hung cabinets and not much else. The difference is real money at volume, and it is invisible.
- Moisture resistance. Singapore is humid and your kitchen is wet. Marine or BWP-grade plywood uses phenol formaldehyde resin and holds up. Standard ply under a sink does not. The failure mode is slow — swelling at the base, doors misaligning around year four — so by the time you notice, nobody is answering the phone.
- Formaldehyde grade. E1 is the common baseline. E0 is typically sold as an upgrade at 20 to 30 per cent on the affected carpentry, and ENF-grade board costs roughly 30 to 40 per cent more at wholesale. Cheap quotes sometimes drop to E2-grade boards, which are lighter, structurally weaker, and warp in local humidity within a few years. Full detail on what these grades actually mean is in ENF vs E1 board rating.
Across a full flat, specification choices alone can swing carpentry by 20 to 30 per cent. Two quotes can both say "carpentry — laminate finish, plywood carcass" and describe materially different objects.
Ask for board grade, carcass thickness and panel construction — solid or hollow-core — in writing, per item. A firm that will not put it in writing is telling you something.
3. Margin stacks at every layer
This is the mechanic homeowners least expect, and it explains the largest gaps.
Most interior design firms in Singapore do not hold an HDB renovation contractor licence and do not employ tradesmen. They design, they coordinate, and they subcontract the actual work. That is a legitimate business model. It is also a layered one.
The chain typically runs: carpenter or trade subcontractor, then main contractor, then ID firm, then you. Each layer covers its own overheads, warranty exposure and profit, and industry practice puts each layer's addition somewhere around 15 to 30 per cent.
Run the arithmetic on a carpentry package with a $10,000 trade cost. One layer at 20 per cent gets you to $12,000. Two layers gets you to $14,400. Three gets you to $17,280. Nothing has changed about the cabinet. The board is the same board, the carpenter is the same carpenter, and the job takes the same eleven days.
This is why "get quotes from five firms" often produces a confusing spread. You are not comparing five approaches to the same job. You are comparing supply chains of different lengths, and sometimes two of your five quotes are sourcing from the same carpenter.
The economics are the whole argument for keeping trades in-house. Not craftsmanship rhetoric — a firm with its own factory and its own crews has one margin to take instead of three, and it can price the board grade honestly because it buys the board. We run our factory at 2 Defu South Street 1 for exactly this reason, and we let people visit before they sign, because a claim about in-house production is worth nothing unless you can walk into it on a Saturday morning.
The corollary matters too. If a firm subcontracts, ask who. A good main contractor with long-standing trade relationships beats a bad in-house operation. The layers are the problem, not the model.
4. "Per foot run" means different things
A foot run is one linear foot of cabinetry, about 305mm, measured along the wall. That part is standard. How firms count it is not.
A 10-foot kitchen with cabinets top and bottom can be quoted three ways:
- Per row. $150 a foot becomes $3,000. Two rows, ten feet each.
- Combined. $300 a foot becomes $3,000. Same money, different presentation.
- Blended across the flat. Total all cabinetry — kitchen, wardrobes, console, shoe cabinet — and divide by a headline rate. The rate looks low because the footage is inflated.
All three can produce the same final figure. All three can also produce wildly different figures, and the rate alone will not tell you which.
Then there is what the rate covers. Countertops are quoted separately almost universally — our own card runs $110 per foot run for Arkstone sintered stone and $130 for Aximus, top and backsplash charged separately. Branded hardware is separate. Internal accessories — pull-out baskets, drawer dividers, lift-up mechanisms — separate. A carcass to ceiling versus one stopping at 2.1m is a different quantity entirely.
One question settles most of it: is this rate for one row or for top and bottom combined, and what is inside it?
5. The exclusions page is the real quote
The cheapest quote is frequently the one with the longest exclusions list, and the exclusions list is on page four in six-point type.
Standard omissions across the industry: lighting fittings, sanitary ware, appliances, curtains and blinds, countertops, hardware upgrades, hacking and disposal on resale units, waterproofing, and post-renovation cleaning. Individually they look minor. Together they run roughly $12,000 to $20,000 on a typical 4-room, which is the arithmetic behind our BTO budget breakdown.
A firm that includes a realistic lighting and sanitary ware allowance will look $5,000 more expensive than one that excludes both. It is not more expensive. It is more honest, and you will spend the money either way.
Compare quotes by scope, not by total. Write the item list down the left of a spreadsheet, put the three firms across the top, and fill in every cell. The blanks are the story. Line them up on the same material and grade, the same construction method, the same hardware and the same scope, and the gap usually explains itself.
A cheaper quote is not a better deal if it is quietly quoting a cheaper thing.
6. Padding for variation orders
Some firms price low to win the job and recover margin through variation orders later. Others price the real number up front. Both are rational. Only one is pleasant to live through.
A variation order is any change after the contract is signed. Move a socket. Add a shelf. Change the laminate after seeing it under site lighting. Variation orders are priced without competition — you cannot get three quotes for a socket move while your kitchen is half-built — so the rate is whatever the contractor says it is.
The tell is scope precision. "Electrical works — $4,500" has no defined quantity, so any point you add later is a negotiation. "24 power points, 18 lighting points, 4 aircon points, DB box upgrade, $60 per additional 13A point thereafter" has priced the change before you make it.
Insist on the thereafter rates in the original contract. It costs nothing to ask at quotation stage and it removes the entire incentive to underquote.
Payment stages are pricing too
Two quotes at the same number are not the same deal if one wants 50 per cent up front.
A reasonable Singapore structure runs roughly: 10 to 15 per cent deposit, 15 to 20 per cent on commencement, 20 to 25 per cent at masonry stage, 20 to 25 per cent at carpentry stage, and the final 5 to 10 per cent at handover after defects are cleared. Under the CaseTrust accreditation scheme, an accredited firm's deposit is capped at 20 per cent of contract value, so there is no legitimate reason for a deposit to exceed that.
Payments should be tied to completed stages, not to calendar dates — a date-triggered payment means you can be billed for work that has not happened. And a contract with no final holdback has stripped out your only real leverage during the defects period.
Front-loading is how undercapitalised firms fund the previous customer's job with your deposit. When that chain breaks, it breaks at the deposit end. Firms that price properly do not need your money early.
If it is too good to be true, it usually is
Here is the friendly advice we give every client. If a number looks too good to be true, it almost always is. Quality and price sit at loggerheads. It is genuinely rare to get excellent quality at a low price, and when a quote comes in far below the rest for the same items, the saving has to come from somewhere. Thinner boards. Lower-grade glue. Cheaper hardware. Rushed labour. Or a stack of variation orders waiting quietly after you sign.
The lowest number on day one is very often the highest number by the end.
Questions to ask before you sign
Take this list to every quotation.
- What board grade and carcass thickness, per item, in writing? 18mm or 15mm? Solid or hollow-core?
- What formaldehyde rating — E1, E0 or ENF? Is there certification?
- Is the carpentry rate per row, or top and bottom combined?
- Who physically does each trade? Your staff or a subcontractor? Which subcontractor?
- Are you HDB-registered, or are you subcontracting a registered firm to submit the permit?
- What is on the exclusions page? Read it out loud.
- What are the thereafter rates for additional points, additional foot run, additional fittings?
- What is the payment schedule, and what triggers each stage — completion of works, or a date?
- What is the handover holdback percentage and how long is the defects liability period?
- Is the countertop, hardware and internal accessories included or separate?
- Can I see the workshop or factory where my carpentry will be built?
- What is the warranty, what does it cover, and who honours it if the subcontractor is gone?
Question 11 is the one most people skip and the one that resolves the most ambiguity. Specification arguments end quickly when you can put your hand on the board.
Choose for your interest, not the extremes
The goal is not to pick the most expensive quote to feel safe, and it is not to grab the cheapest to feel clever. The goal is to choose the person who actually understands you — your home, your budget, the way you live — and who will tell you honestly where you can save and where you should never cut corners.
A good designer will talk you out of spending in the places that do not matter to you, and hold firm on the ones that do. That judgement is worth more than any single line on a quote.
At the end of a renovation, the figure you remember is not the quote. It is whether the people you trusted did what they said they would. Trust is worth more than dollars. Choose the studio you believe will still pick up the phone after the deposit clears, and the price tends to take care of itself.
If you have quotes in front of you and the spread is confusing, bring them to us. We will tell you which lines are underspecified and what is missing — talk to the team on 8124 0909.