Planning to engage a hacking contractor for walls, floors, or tiles in your HDB flat? You almost certainly need an HDB renovation permit before a single jackhammer is lifted. Unauthorised hacking carries fines up to S$5,000 and mandatory reinstatement costs of S$10,000 to S$30,000 — far more than the permit itself. This 2026 guide walks through exactly which hacking works need HDB approval, what you can and cannot hack, the step-by-step application process, approval timeline, working-hour rules, and how much an HDB Licensed Renovation Contractor should cost.
If you already know the rules and just need a licensed contractor to handle the permit and execute the hacking safely, jump straight to our Hacking Services Singapore page for a site-specific quote.
Not every renovation change triggers an HDB permit, but the vast majority of hacking works do. HDB requires written approval for:
If any of your works fall under these categories, your HDB hacking contractor must submit a renovation permit application on your behalf before starting. Skipping this step is the single most common cause of HDB fines in residential renovation projects.
This is where most HDB homeowners get caught out. The rules from HDB’s permitted renovation works guide differ by wall type, flat type, and age of the flat.
If you live in a BTO flat, you cannot hack bathroom or toilet tiles within the first 3 years from the date of completion. This rule protects HDB’s waterproofing warranty. Break it and you void the warranty — any future water seepage becomes your problem, not HDB’s.
Your Licensed HDB Renovation Contractor (RC) handles the permit submission through the HDB APEX online portal. You do not apply directly. Here is the flow:
Tip: resubmissions happen when drawings are unclear or the scope touches a forbidden wall. A good contractor spots issues before submission, not after.
HDB typically processes renovation permit applications in up to 3 weeks. Straightforward scopes (single wall hack, simple tile replacement) often clear in under 10 working days. Complex submissions that touch structural boundaries take longer.
Breaching the noisy-hours rule is a frequent source of neighbour complaints. Schedule hacking days on weekday mornings to finish before 5pm.
If your contractor cannot finish within the window, an extension must be requested before expiry — not after.
Total HDB hacking cost combines three line items: the contractor’s hacking labour, HDB permit fees, and NEA-compliant debris disposal. Indicative 2026 figures:
| Cost Item | Typical Range (SGD) |
|---|---|
| HDB renovation permit fee (paid by contractor) | $10 to $50 per application |
| Single wall hacking (non-load-bearing) | $400 to $1,200 |
| Bathroom / kitchen tile hacking | $800 to $1,800 per unit |
| Full-unit floor hacking | $1,500 to $3,500 |
| Whole-home HDB hacking works | $3,000 to $8,000+ |
| Debris disposal (NEA-compliant) | $150 to $400 per truck |
Prices vary with access, floor level, and whether the flat is occupied during works. See our detailed hacking services Singapore page for a site-specific quote.
HDB takes unauthorised hacking seriously. The penalty structure in 2026:
The fine is only the visible cost. Reinstatement, delayed occupation, and disputes with your contractor usually add up to several multiples of the original hacking budget.
Based on Fortified’s HDB hacking projects across Singapore, these are the mistakes that trigger fines, reinstatement orders, or neighbour disputes:
Before signing any HDB hacking contract, run through this checklist:
If a contractor hesitates on any of these, walk away. A licensed hacking contractor Singapore will have every item ready before you ask.
Yes. Any tile hacking in HDB bathrooms, toilets, or kitchens requires a renovation permit submitted by your licensed HDB Renovation Contractor. BTO flats have the added restriction that bathroom and toilet tiles cannot be hacked within the first 3 years of completion due to the waterproofing warranty.
HDB processes most renovation permit applications within 3 weeks. Simple single-wall hacking scopes often clear in 7 to 10 working days. Complex scopes that touch structural boundaries or require architect certification take longer.
No. Load-bearing walls, columns, beams, bomb shelter walls, AC ledge walls, and exterior walls cannot be hacked under any circumstance — HDB does not issue permits for structural wall removal in flats. Attempting it voids the block’s structural integrity.
Noisy works including hacking are allowed 9am to 5pm on weekdays only. No hacking is permitted on Saturdays after 5pm, Sundays, or public holidays. General non-noisy renovation works can run 9am to 6pm Monday to Saturday.
Single non-load-bearing wall hacking typically costs S$400 to S$1,200. Bathroom or kitchen tile hacking runs S$800 to S$1,800 per unit. Whole-home HDB hacking works range from S$3,000 to S$8,000+. Add S$150 to S$400 per truck for NEA-compliant debris disposal and S$10 to S$50 for the permit fee itself.
First-offence fines reach S$5,000. If the wall was forbidden, HDB issues a mandatory reinstatement order costing S$10,000 to S$30,000 to rebuild. Stop-work orders can delay your move-in by weeks. Repeat offences attract fines up to S$10,000 plus prosecution.
Yes — only a licensed HDB Renovation Contractor (RC) with a valid licence number can submit a renovation permit on your behalf. Homeowners do not apply directly. Always verify the contractor’s RC licence on the HDB website before signing.
BTO flats have 3 months from permit approval to complete all renovation works. Resale flats have a shorter 1-month window. If your contractor needs more time, they must request an extension before the permit expires — not after.
HDB requires contractors to distribute a renovation notice to adjacent units before noisy works begin. The notice states the dates, expected noise levels, and contact details. Good contractors handle this automatically; confirm it is done before the first day of hacking.
Yes. HDB flats go through HDB’s renovation permit system. Condos go through the Management Corporation Strata Title (MCST) of the development, not HDB. Rules differ per condo but usually require MCST approval plus a licensed contractor. Do not assume HDB rules apply to condo units.
Need HDB-compliant hacking in Singapore? Fortified is a licensed hacking contractor Singapore handling permit submission, dust control, and NEA-compliant debris disposal on every HDB project.
Since mid-2024, all HDB renovation permits are submitted through the APEX portal (Application for Renovation Permit via Electronic Transaction). This is the only official submission channel — no more paper forms at HDB branch offices. Your licensed contractor logs in with their RC credentials, uploads the floor plans, and files the application entirely online.
What APEX requires:
HB-XXXX-XXXX-XXXX. Your contractor must hold a valid DRC number; check it on the HDB website before signing any contract.APEX processing itself is free — HDB does not charge a fixed permit fee. Your contractor may include a small admin fee (typically S$10 to S$50) in the quote to cover their submission time.
A Professional Engineer (PE) endorsement becomes mandatory when the hacking scope touches any structural element. Even if HDB would not normally approve structural wall removal, any scope borderline close to load-bearing zones can trigger a PE review request from HDB.
When PE endorsement is typically required:
PE endorsement fees are not regulated — market rates run from S$500 to S$2,500 depending on scope complexity. This is over and above the hacking contractor’s quote. Ask the contractor upfront whether your scope needs PE sign-off, so the cost does not come as a surprise mid-project.
Not every renovation item needs a permit. You can safely proceed without HDB approval on:
The line between permit-required and permit-free gets blurry once any hacking is involved. When in doubt, ask your licensed contractor — a S$10 to S$50 APEX submission is far cheaper than a S$5,000 fine.
Unauthorised hacking has one more hidden cost: it complicates your future resale. HDB checks permit records when a flat is sold. Unapproved structural modifications must be reinstated to the original layout before the sale can proceed — a cost and delay buyers do not want to inherit. Resale listings for flats with unresolved permit issues typically see lower offers and longer time on market.