HDB Renovation Permit 2026: Rules, Timeline, Prohibited Works
Every HDB renovation requires a permit submitted at least 7 days before work starts. Approval typically takes 3-5 working days and costs nothing. You must follow strict rules: no hacking structural walls, no changing window grilles without HDB approval, works only Mon-Sat 9am-6pm. Penalties for unpermitted work start at $200 and can escalate to $5,000 or restoration orders. Submit your renovation application through HDB's online portal with floor plans, contractor license details, and scope of works.
When You Need an HDB Renovation Permit
HDB requires a renovation permit for any work that involves hacking, plumbing, electrical rewiring, or structural changes. Minor cosmetic works like repainting walls or changing curtains don't need a permit, but the moment you start hacking tiles, moving partition walls, or installing new lighting points, you need approval.
Works That Require a Permit
- Hacking and removal: Floor tiles, wall tiles, internal walls (non-structural only), kitchen and toilet fixtures
- Electrical works: Adding power points, installing ceiling fans, relocating distribution boards, new lighting circuits
- Plumbing works: Repositioning sinks, toilets, or washing machine points, installing instant water heaters
- Built-in fixtures: Carpentry for wardrobes, kitchen cabinets, false ceilings, platform beds
- Window and door modifications: Installing casement windows, changing main door designs, adding or removing window grilles
- Air-conditioning: New compressor installation with brackets, ledge works, condensate pipe routing
Works That Don't Need a Permit
Cosmetic upgrades like painting, wallpaper, vinyl flooring over existing floors (no hacking), freestanding furniture, curtain installation, and minor repairs fall outside permit requirements. If you're unsure, always check with HDB or submit an enquiry—getting caught doing unpermitted work costs far more than clarifying upfront.
How to Apply for Your HDB Renovation Permit
The application process is entirely digital through HDB's online portal. You'll need your SingPass, property details, and your contractor's license number. HDB-licensed contractors like Larry Contractors (HB-09-5667H) handle this submission as part of the renovation package, but homeowners can also submit independently if hiring unlicensed handymen for minor works (not recommended).
Step-by-Step Application Process
- Log in to HDB portal: Use your SingPass to access the renovation permit section at www.hdb.gov.sg
- Enter property details: Block number, unit number, renovation start and end dates (maximum 3 months duration)
- Upload documents: Floor plan showing works, contractor's HDB license, scope of works description
- Declare compliance: Confirm you understand the rules on working hours, noise restrictions, and prohibited works
- Submit application: No fees required for standard residential renovations
- Receive approval: Typically 3-5 working days via email notification
Required Documents and Information
Prepare a simple floor plan marking which walls you're hacking, where new fixtures go, and electrical points. You don't need professional architectural drawings for typical renovations—a hand-drawn annotated plan is acceptable. Include your contractor's HDB license number (they provide this), renovation timeline, and contact numbers for both homeowner and contractor.
| Application Timeline | Action Required | Duration |
|---|---|---|
| Before starting works | Submit renovation permit application | Minimum 7 days advance |
| HDB processing | Wait for approval notification | 3-5 working days |
| Works commencement | Display permit notice at unit | First day of renovation |
| During renovation | Keep permit accessible for inspection | Throughout project |
| After completion | No formal closure needed for standard works | N/A |
Prohibited Works and Critical Restrictions
HDB has strict rules protecting structural integrity and estate harmony. Breaking these isn't just a fine—you may be forced to restore everything at your own cost, often $15,000-$40,000 depending on what you've altered. Know these boundaries before planning your layout.
Structural Works You Cannot Do
Never hack structural walls—these include all external walls, columns, beams, and walls between your unit and common areas. You also cannot remove or modify bomb shelter walls (unless converting under HDB's official scheme with proper approval), hack the floor slab, or alter the roof structure. Internal partition walls marked on the original HDB plan may be removable, but always verify with your contractor's structural assessment.
Window and Façade Restrictions
You cannot install full-height glass panels, extend window openings, or add balcony enclosures without HDB approval. Window grilles must follow specific designs—horizontal bars only for lower floors, no decorative patterns that obstruct emergency access. Air-con compressors must sit on HDB-approved ledges with proper brackets; you cannot simply bolt them to the external wall.
Plumbing and Sanitation Rules
Bathrooms and kitchens must maintain proper floor traps and waterproofing. You cannot relocate toilets or kitchens to areas without existing plumbing stacks—moving a kitchen to where the bedroom was isn't typically feasible due to drainage requirements. Instant water heaters require appropriate electrical capacity; most HDB flats have 40A or 60A supply, which limits heater wattage.
Noise and Working Hours
Renovation works are restricted to Monday-Saturday, 9am-6pm. No noisy works on Sundays and public holidays—this means no hacking, drilling, or heavy machinery. Minor quiet works like painting or carpentry assembly might be tolerable, but neighbours can still report violations. Penalties start at $200 per offence and increase with repeated complaints.
| Violation Type | Penalty Amount | Additional Consequences |
|---|---|---|
| Working outside permitted hours | $200 per incident | Suspension of works if repeated |
| No valid renovation permit | $1,000-$5,000 | Stop-work order issued |
| Hacking structural walls | $5,000+ | Mandatory restoration at owner's cost |
| Unauthorised façade changes | $5,000+ | Restoration order plus engineering assessment fees |
| Repeated noise complaints | $200-$1,000 | Possible permit revocation |
Special Cases and Additional Approvals
Some renovations require extra approvals beyond the standard HDB permit. If your plans involve structural changes, façade alterations, or business use, expect additional lead time and documentation.
Bomb Shelter Conversion Scheme
HDB allows converting household shelters into regular rooms under specific conditions. You need to apply through the Civil Defence Shelter Department, engage a qualified builder (PE-endorsed contractor), and pay conversion fees around $2,500-$4,000. The process adds 4-6 weeks to your timeline. Original shelter doors and walls must remain in place; you can add a secondary door and use the space functionally while maintaining emergency access.
Business or Home Office Use
Running a business from your HDB flat requires separate HDB approval beyond renovation permits. Small-scale home-based businesses (tutoring, e-commerce without walk-in customers) may be approved, but retail, food preparation, or high-traffic businesses typically aren't. Renovation works for business use are scrutinised more carefully—expect HDB to verify that modifications don't disrupt neighbouring units or change the residential character.
Elderly-Friendly or Accessibility Modifications
Installing ramps, grab bars, or widening doorways for wheelchair access generally receives faster approval. HDB's Enhancement for Active Seniors (EASE) programme even subsidises certain modifications like slip-resistant flooring, bathroom grab bars, and ramps. Eligibility depends on household age profile; subsidies cover 90-95% of costs up to $4,500.
Common Mistakes That Lead to Rejection or Penalties
Most permit issues stem from incomplete documentation or misunderstanding the scope of allowable works. Avoid these pitfalls to keep your renovation on track.
Vague or Incomplete Scope Descriptions
Writing "full renovation" or "kitchen and bathroom upgrade" isn't specific enough. HDB wants to know exactly which walls you're hacking, how many power points you're adding, and whether you're relocating any plumbing fixtures. A detailed itemised scope prevents back-and-forth queries that delay approval.
Using Unlicensed Contractors
Only HDB-licensed contractors can legally perform renovation works in HDB flats. Hiring an unlicensed handyman puts liability entirely on you—if anything goes wrong structurally or if neighbours complain, HDB holds the homeowner accountable. Licensed contractors like Larry Contractors carry insurance and understand the approval process, reducing your risk significantly.
Starting Works Before Approval
Some homeowners submit the permit and start hacking the next day, assuming approval is automatic. If HDB rejects the application or requests amendments, you're already in violation. Always wait for the official approval email before your contractor mobilises. The 3-5 day wait is built into professional renovation timelines.
Ignoring Neighbour Notifications
While not legally required, informing your immediate neighbours about renovation dates and expected noise prevents disputes. Slip a courtesy note under their doors with your contact number and contractor details. Most noise complaints come from surprise disruptions, not the renovation itself. Managing expectations upfront keeps neighbour relations smooth and reduces the chance of complaints to HDB.
Compliance During and After Renovation
Getting the permit is only the first step. HDB officers can inspect your unit during renovation, and violations discovered mid-project result in stop-work orders. Post-renovation, certain works require certification before you're fully in the clear.
Displaying Your Permit
Print the approval email or permit notification and display it prominently at your unit entrance. HDB officers, Town Council staff, or neighbours may request to see it. Contractors should also keep a copy on-site. Failure to produce a valid permit during an inspection triggers immediate stop-work orders.
Mandatory Inspections and Certifications
Electrical works require a Licensed Electrical Worker (LEW) to certify the installation. Your contractor arranges this—costs are typically $150-$300 and take 1-2 days. Plumbing works over a certain complexity need a licensed plumber's sign-off. These certifications must be submitted to HDB if requested, particularly for resale or if issues arise later.
What Happens If You're Caught
HDB takes violations seriously. If caught without a permit, you'll receive a stop-work order immediately—all work halts until you apply and receive approval, delaying your project by at least a week. Structural violations result in mandatory engineering assessments (costing $3,000-$8,000) and restoration orders. In extreme cases, HDB can compel you to undo all works and restore the flat to original condition, costing tens of thousands of dollars.
Frequently Asked Questions
How much does an HDB renovation permit cost in 2026?
Standard HDB renovation permits for residential works are free of charge. You pay nothing to submit or receive approval. However, if your renovation involves structural endorsements, bomb shelter conversions, or business-use approvals, additional fees ranging from $500-$4,000 may apply depending on the complexity and required professional certifications.
Can I apply for the renovation permit myself without a contractor?
Yes, homeowners can submit renovation permits independently through the HDB portal. However, you still need an HDB-licensed contractor to perform the actual works—HDB doesn't permit DIY structural, electrical, or plumbing works in flats. Most licensed contractors handle permit submission as part of their service, ensuring accuracy and faster approval since they're familiar with HDB's requirements.
What if my renovation takes longer than the 3-month permit period?
HDB renovation permits are valid for a maximum of 3 months. If your project extends beyond this, you must apply for a permit extension before expiry. Extensions are granted on a case-by-case basis, typically for genuine delays like material shortages or unforeseen structural issues. Continuing works after permit expiry without an extension violates HDB rules and incurs penalties.
Do I need a permit to install built-in wardrobes or kitchen cabinets?
Yes, built-in carpentry fixtures like wardrobes, kitchen cabinets, and false ceilings require a renovation permit because they involve permanent structural attachment and often electrical work for lighting. Freestanding furniture doesn't need a permit. If your carpenter is hacking existing fixtures, installing backing boards, or running electrical cables, you need HDB approval before starting.
Can HDB reject my renovation permit application?
Yes, HDB can reject applications that propose prohibited works like structural wall hacking, unauthorised façade changes, or insufficient documentation. Rejections aren't common for straightforward renovations with clear plans. If rejected, HDB provides reasons and you can resubmit with amendments. Working with an experienced licensed contractor minimises rejection risk since they know what HDB approves.
Get Your HDB Renovation Started the Right Way
Navigating HDB permits doesn't have to be complicated when you work with a licensed contractor who knows the process inside-out. Larry Contractors (HDB License HB-09-5667H, BCA GB2) has completed over 500 HDB projects since 2009, handling all permit submissions, compliance checks, and certifications as part of our transparent fixed-price packages. We manage the paperwork so you can focus on designing your dream home. Get a detailed quote and permit timeline today—message us on WhatsApp at https://wa.me/6591072601 and we'll walk you through exactly what your renovation needs to stay compliant and on schedule.