How We Estimate Renovation Costs

Every cost figure on this site is an illustrative range compiled from several current Singapore renovation price guides, cross-checked, labelled for the year, and reviewed quarterly — never a quote and never a guarantee. The rules are a different matter: every rule, fee, licensing requirement and date comes from an official primary source, re-checked at that source and carried with an “as of” date. This page explains that methodology in full, so you can judge our numbers for what they are and use them safely.

Why renovation has no official price list

The starting point is uncomfortable but important: no official body publishes a renovation price list. HDB, the Energy Market Authority (EMA), PUB and the Building and Construction Authority publish rules and licensing — who may do the work, what needs a permit, what is banned — but not what a contractor may charge. HDB’s own guidance makes the point: disputes with a contractor over “pricing, work schedule, and type and quality of the renovation works” are a private matter between you and the contractor, to be resolved through CASE, the Singapore Mediation Centre, the Small Claims Tribunals or the courts.

How we label everything we publish.

That means any renovation “price” you read anywhere — here or elsewhere — is an estimate, not an official rate. We would rather say so plainly than imply a precision that does not exist.

Where our cost ranges come from

For the cost side, we compile figures from multiple current, published Singapore price guides and contractor rate cards, take them as a band rather than a single number, and label the band illustrative for the stated year. Those guides say the same thing about their own numbers — one we use notes its figures are “indicative market ranges as of 2026 and vary by material, design, ceiling height and finish.” We treat competitor and industry pages only as a source of ranges and reader questions, never as an official fact.

We do not survey contractors, collect quotes, or claim to have done a job ourselves. Where a figure depends on live official data — a tax rate, a loan cap — we take it from the official source instead of a guide. Everything else is an illustrative planning band, and we say so on the page.

How we source the rules

Rules get a stricter standard than prices. Every rule, permit trigger, fee and licensing requirement is taken from the official primary source and cited with an “as of” date. The anchors we rely on include:

• HDB for renovation guidelines, permits and what is allowed — for example, that you must engage a contractor listed in the Directory of Renovation Contractors (DRC) for all renovations, or that a false ceiling must leave a minimum clearance of 2.4 metres and that floor finishes plus screed must not exceed 50mm.
• AGC’s Singapore Statutes Online for the law itself — the Housing and Development (Renovation Control) Rules state that no person may carry out renovation works in an HDB flat unless registered, with a fine not exceeding $5,000 on conviction.
• EMA for electrical and gas licensing, PUB for water and sanitary works, BCA for windows and structural matters, and SCDF for household shelter and fire-safety rules.
• IRAS for tax — the prevailing GST rate is 9% (since 1 January 2024), and all price displays must be GST-inclusive.

When we reuse a rule we have cited before, we re-confirm it at the official page rather than trusting our own earlier draft, because requirements change.

How we handle conflicting numbers

Price guides disagree constantly, because the same headline hides very different scopes. Carpentry, for instance, is priced per foot run and the finish alone moves it a lot — one guide puts a wood veneer at about 30% and spray paint at about 45% over a laminate finish. So when sources conflict, we do three things: publish a band that spans the credible figures, flag an obvious outlier rather than averaging it in, and tell you to get at least three itemised quotes and compare scope, not just the headline. That is the same discipline the better industry guides recommend.

What we never do

Our content-truth rules are fixed, and they exist to keep the site trustworthy:

• No “we tested” and no invented experience. We do not claim to have renovated a flat or hired a contractor.
• No fake authors, testimonials or review scores. Pages are written by the site’s editorial team; our how to choose a renovation firm guide is advice, not a sponsored list.
• No price guarantees. An illustrative range is never a promise.
• No affiliate-ranked numbers. Where a page carries affiliate or lead links, they are disclosed, and they never change a figure or a ranking.
• No unverifiable filler. If we cannot tie a number to a source, we leave it out and tell you where to check.

How often we update

Rules are updated on an event basis — when HDB, EMA, PUB, SCDF, BCA or IRAS change a requirement, the affected pages are re-checked and re-dated. Illustrative cost ranges are reviewed quarterly, because they drift with the market rather than on a fixed rule change. The “as of” date on a figure or a source tells you when we last confirmed it; if it looks stale for a fast-moving number, check the official source directly.

How to use our numbers

Treat our ranges as a budgeting and quote-checking tool, not a price list. Three habits make them useful:

1. Get at least three itemised quotes and compare the scope line by line — our how to compare renovation quotes guide shows how.
2. Confirm GST. Many quotes exclude the 9% GST that registered businesses must charge, so a tax-exclusive quote is not comparable to a tax-inclusive one.
3. Start from the whole-flat picture, then drill into line items — the HDB renovation cost guide gives the overview, and pages like hidden renovation costs cover what quotes leave out.

If you ever find a figure or rule on this site that looks wrong or out of date, our corrections address is on the editorial pages — we would rather fix it than defend it.

Frequently asked questions

Are your cost figures quotes? No. They are illustrative ranges compiled from several current Singapore price guides, labelled for the year. A real quote depends on your flat, its condition, the materials and the finish, and can sit inside, below or above our band.

Why don’t you give one exact price? Because the same job swings widely with scope and finish, and no official price list exists to anchor to. A band is honest; a single number would imply a precision we cannot stand behind.

Where do the rules come from? From official primary sources — HDB, EMA, PUB, BCA, SCDF, IRAS and the law on Singapore Statutes Online — each cited with an “as of” date and re-checked at the source when reused.

How current are the numbers? Rules are updated when the authority changes them; illustrative cost ranges are reviewed quarterly. Each figure’s “as of” date shows when it was last confirmed.

Do you make money from the links? Some pages carry affiliate or lead links, disclosed on the page. They never change a figure, a range or a ranking — rankings and numbers are set before any link is placed.

This page describes our editorial method. Cost figures across the site are illustrative industry ranges, not quotes; rules and fees are from official sources and dated. Always confirm current figures with the relevant authority and get itemised written quotes before you commit.