Key Takeaways:
- Compliance protects your investment. Only non load bearing walls may be hacked; secure an HDB renovation permit via a licensed contractor and follow HDB guidelines on false ceilings, finished floor level, ventilation sleeves, and the refuse chute.
- A thoughtful plan controls cost. Define scope early, request itemised quotes, and ring-fence a budget contingency (10–20%) for unexpected costs—from permits to renovation debris disposal.
- Design and detail drive longevity. Durable floor finishes, resilient wall finishes, quality fixtures, and precise installation ensure your home renovation looks refined and performs beautifully for years.
At Lemonfridge Studio, we believe interiors should be a reflection of who you are—crafted with tailored designs, modern concepts, and premium finishes. Our award-winning interior designer team delivers hdb renovations that transform an ordinary flat into a sublime, personal unit. Throughout this guide, we demystify renovations, the renovation process, and the guidelines that matter so flat owners can plan confidently.
Your Vision, Our Method: How We Redefine the Art of Living
Every project starts before key collection. We workshop your design story—Scandinavian, Minimalist, Japandi, or Modern Contemporary—then map the plan to spatial realities. For inspiration, see our perspectives on Scandinavian calm, our take on warm minimalism, the Japandi blend, our modern contemporary approach, and nuanced wabi-sabi. Early clarity keeps renovations focused and cost-efficient, ensuring walls, flooring, tiles, fixtures, and cabinets are specified holistically.
2025 Realities: Cost, Timeline, and What Many Homeowners Are Asking
In 2025, cost expectations for hdb renovations range roughly from SGD 25,000–70,000 depending on room count, scope, and materials. Bathroom upgrades often cost SGD 5,000–10,000 per bathroom; a kitchen can cost more if custom fixtures and carpentry are installed. A realistic timeline includes 4–5 weeks of pre-renovation planning and submission, then 8–12 weeks of renovation works depending on the flat. Because renovations are more complex for resale hdb flats, flat owners should add time for demolition, waterproofing checks, and new flooring. To manage budget and unexpected costs, we recommend a contingency of 10–20%.
Compliance First: Permits, Guidelines, and the Directory You’ll Use
HDB requires prior approval for designated renovation works. Your interior designer will submit the renovation permit electronically and coordinate the application with the contractor listed in the Directory of Renovation Contractors (DRC) on HDB InfoWEB (hdb infoweb). The Housing & Development Board is the authority whose guidelines keep building safety paramount, so engage licensed renovation contractors and avoid unauthorised work. We advise what to submit, when to submit, and how to sequence installation to keep the renovation process moving.
What You Can and Cannot Hack: Walls, Reinforced Concrete, and RC Slabs
Only non load bearing walls can be hacked in hdb flats, and the appropriate permits must be secured first. Structural reinforced concrete members and the rc slab are protected elements and must remain intact. Where an existing wall is retained, we re-align new wall finishes and cabinets to create visual continuity. Wall finishes like limewash and textured paint are popular in 2025.
Bathrooms and Wet Areas: Waterproofing and Existing Floor Finishes
Bathroom zones are compliance-heavy. If your flat is newly TOP, flat owners may not replace tiles for the first three years. When works are allowed, we test the waterproofing membrane and re-screed so the finished floor level remains consistent, avoiding steps at thresholds. We also review existing floor finishes in adjacent rooms to ensure smooth transitions and confirm that new floor finishes are correctly installed.
Heights and Services: False Ceilings, Ventilation Sleeves, and Minimum Clearance
False ceilings are excellent for lighting design and cable routes, but HDB stipulates a minimum clearance height in habitable rooms. Our team designs services carefully; ventilation sleeves are coordinated for bathrooms and kitchens so extraction performs and penetrations remain compliant. Above the finished floor level, we ensure sprinkler heads, lighting fixtures, and trunking respect fire guidelines.
Doors, Shelters, and Notices: Main Door Etiquette and HS Door Notice
The main door and household shelter follow specific guidelines. We never remove required locking bolts or alter door frames that protect the shelter. An “hs door notice” is displayed during renovations to prevent obstruction. If a door seal is replaced, we do so with approved parts and retain all safety signage.
Debris, Refuse Chute, and Good Neighbourliness
Renovation debris must be managed responsibly. We schedule collection for bulky items, keep common areas clean, and ensure no work compromises the refuse chute in the unit or shared landings. A Notice of Renovation is displayed to inform neighbours at least three working days before noisy renovations. All renovations are structured to minimise disturbance and keep your building tidy.
Cooling with Care: Your Air Conditioner and Proper Installation
If your air conditioner is mounted externally or projects from the facade, a BCA-trained installer must be engaged. The installation report is submitted to HDB within two weeks of completion. Our contractor coordinates ventilation sleeves, brackets, and drainage with the wall finishes and finished floor level so the unit runs efficiently. We also ensure non combustible materials are used where specified.
Smart, Seamless, and Future-Ready
Beyond layout and flooring, we integrate smart lighting and controls. Explore our smart-home overview, learn about smart lights in real projects, and see how modern smart switches simplify daily life. These installations are planned with false ceilings, walls, and cabinets so the interior remains calm and elegant.
Craft and Materiality: Floor Finishes and Wall Finishes that Endure
From porcelain tiles to vinyl planks and engineered timber flooring, we specify floor finishes that match lifestyle and maintenance needs. For kitchens, we consider impact resistance and slip ratings; for bedrooms, acoustic underlay and warmth underfoot. For wall finishes, we evaluate limewash, micro-cement, and paint systems—and, where required, non combustible materials. The goal is a balanced palette so the entire flat feels cohesive.
Integrated Storage, Cabinets, and Fixtures
Storage is the quiet star of successful renovations. We design cabinets, wardrobes, and benches that blend with wall planes, then coordinate fixtures—taps, shower sets, and lighting—to form a unified vocabulary. Whenever new installations meet existing floor finishes, careful detailing preserves a consistent finished floor level so the eye reads the space as generous and serene.
Setting the Right Budget and Contingency
We advise homeowners and flat owners to set a budget before works begin. Gather itemised quotes from at least three parties—either interior designers or renovation contractors—to compare scope, fixtures, and materials. Renovation loans can fund core renovation works like flooring, plumbing, and carpentry, while personal loans may cover furniture and other materials. Always set aside a contingency of 10–20% to handle unexpected costs.
Transparent Quotes and Realistic Cost Ranges
Itemised quotations help you see exactly what you’re paying for, from tiles and cabinets to demolition and installation. As a reference, basic 3-room hdb renovations can start around SGD 25,000–40,000, while a bespoke 5-room resale flat with extensive carpentry, new floor finishes, and appliances may exceed SGD 70,000. Your interior designer will align cost, plan, and design intent so renovations deliver value where it matters.
The Renovation Process at a Glance
Our renovation process has three arcs: pre-renovation, on-site renovation works, and completion. The pre-renovation arc (about 4–5 weeks) covers design, selections, measurements, and permit submission. During works, our contractor and site team carry out demolition, masonry, plastering, installation, and finishing. Completion includes testing, cleaning, and handover documentation.
Pre-Renovation: Submissions and Site Readiness
Before any hacking, we submit the permit with drawings and, where needed, neighbour consent. We verify which renovation works require HDB approval, confirm appointment of a contractor, schedule deliveries of tiles, fixtures, and cabinets, and protect flooring and walls. This disciplined start keeps renovations on time and within budget.
On-Site: Demolition, False Ceilings, and Installation
Once the permit is granted, demolition proceeds for approved walls and floor finishes. We install false ceilings for lighting and concealment, carry plumbing and electrical behind new wall finishes, and coordinate the installation of doors, sanitary fixtures, and kitchen systems. Throughout renovations, we protect the refuse chute, maintain ventilation sleeves, and keep the unit neat for safe access.
Furniture, Lighting, and Styling
With the major installations complete, we bring in furniture, rugs, and art. Lighting is layered—ambient, task, and accent—so every room feels intentional. At this stage we also handle appliances, from the oven to the air conditioner remote, and make fine adjustments so cabinets and fixtures align perfectly.
Neighbourly Etiquette: Notice of Renovation and Working Hours
We display the Notice of Renovation outside the flat and schedule noisy tasks during approved hours. We carry debris in sealed sacks and move bulky items safely. This respectful approach helps renovations proceed smoothly and keeps relationships with neighbours pleasant—especially important in dense buildings.
Completion: Touch Ups, Handover, and Aftercare
As renovations conclude, we perform touch ups, deep clean the unit, and remove protection boards. Together with your interior designer, you’ll conduct a final walkthrough to verify workmanship, check flooring and wall finishes, and ensure all fixtures are installed properly. We hand over manuals, warranties, and care guides so your home lives beautifully.
5-Room Ideas, Resale Strategies, and More Inspiration
If you’re planning a bigger unit, browse our ideas for five-room space planning and see curated living-room inspirations. For scope-specific reading, view our guides on 2-room budgets, 3-room options, and 4-room planning. Resale pointers are here: 4-room resale ideas.
Bathroom Focus and Specialist Services
Considering a focused upgrade? Explore our page on bathroom transformations. For whole-home scope, start with our renovation planning hub and visit the broader renovation ideas library for inspiration.
Defects, Timing, and Practical Matters
Handover sequencing matters. Read about defect checks and understand renovation timing windows for new BTO estates. You can also learn about our broader renovation services across hdb flats, condominiums, and landed houses.
A Note on Specific Technical Details Frequently Asked
Flat owners often ask about minimum clearance height under false ceilings, safe use of non combustible materials near the hob, keeping the finished floor level consistent across rooms, the integrity of RC slab penetrations, and safeguarding the refuse chute. They also ask if ventilation sleeves are needed behind air conditioner trunking; yes, where specified. Our team clarifies all guidelines and carry out compliant installation.
Why Lemonfridge Studio
We are a design-first, service-driven studio. Every interior designer on our team pairs creativity with rigorous compliance. We engage the right contractor, organise submissions, and coordinate complex installations so renovations are calm and predictable. For homeowners who want a space that mirrors who they are, we make each flat deeply personal, beautifully built, and timeless.u feel confident, fill the short form below and our professional team will call to address your needs.
HDB Renovation FAQ
How much does it cost to renovate a HDB house?
The renovation cost varies by flat size: 3-room HDB ranges from SGD 25,000-40,000, 4-room HDB costs SGD 35,000-55,000, and 5-room HDB ranges from SGD 45,000-70,000. Resale flats typically cost 15-30% more than BTO flats due to additional rewiring and waterproofing needs.
What time is HDB renovation hours?
HDB renovation work is permitted from 9:00 AM to 5:00 PM on weekdays only. There’s a mandatory quiet hour from 1:00 PM to 2:00 PM. No noisy renovation work is allowed on weekends, Sundays, or public holidays.
Can I complain about renovation noise?
Yes, you can complain about renovation noise. For HDB flats, contact HDB directly if renovations exceed permitted hours or noise levels. For condominiums, approach the respective Management Corporation (MCST).
What time must renovations stop?
All noisy renovation work must stop by 5:00 PM on weekdays. General renovation activities must cease by 6:00 PM. No drilling, hacking, or loud work is permitted after these hours.
How much should I pay for renovations?
Budget 10-15% of your home’s value for renovations, or use the industry standard: SGD 500-800 per square meter for basic renovations, SGD 800-1,200 for moderate upgrades, and SGD 1,200+ for premium finishes.
Is it legal to renovate on weekends?
Quiet renovation activities like painting and cleaning are permitted on weekends. However, noisy work such as drilling, hacking, or demolition is strictly prohibited on Saturdays, Sundays, and public holidays.
How long can an HDB renovation last?
HDB imposes strict completion deadlines: new BTO renovations must be completed within 3 months of permit approval, while resale flat renovations must be completed within 1 month.
What time can HDB start drilling?
HDB drilling can begin at 9:00 AM on weekdays. Drilling must stop by 5:00 PM and is not permitted on weekends or public holidays.
Can drilling be done after 6pm?
No, drilling cannot be done after 6:00 PM in HDB flats. All noisy work including drilling must stop by 5:00 PM on weekdays.
At Lemonfridge, we handle all HDB renovation permits and ensure full compliance with Singapore’s regulations, making your renovation journey smooth and stress-free.
