Best HDB Window Contractor in Singapore
| # | Name | Price | Best for |
|---|---|---|---|
| 1 | AT Aluminium | — | Owners who want windows, grilles and a gate from one workshop |
| 2 | Express Windows | Quote-based. No prices are published. | Owners who want repairs or replacement of casement, sliding or top-hung windows, in HDB or condo |
| 3 | Home Aluminium | — | Owners who want slim, pet-friendly grilles alongside new windows |
| 4 | ZGH Aluminium | Quote-based. No prices are published. | Owners who want a swing-and-slide window that is easier to clean from inside |
| 5 | A ACME Design | — | Owners who want window repair or replacement and glass work from the same firm |
| 6 | Hands@Windows | Quote-based. No prices are published. | Owners with older windows who want an inspection and repair before deciding to replace |
| 7 | 9 Power Aluminium & Glass | — | Owners who put warranty length first |
The best HDB window contractor for most flat owners is one that is on HDB’s list of BCA-approved window contractors, quotes in writing, and handles the renovation permit for you. Of the seven we confirmed, Hands@Windows suits repairs and servicing, A ACME Design suits owners who also want glass work, and 9 Power Aluminium & Glass offers a stated 10-year warranty. AT Aluminium, Home Aluminium and ZGH Aluminium suit full replacements and grilles. Express Windows suits flats and condos alike.
Prices below are published ranges from other sources, not quotes. Always get two or three written quotes for your own flat, and check each contractor on HDB’s directory before you pay a deposit.
What’s changed in 2026
- We removed Grilles N Glass. Its website was live, but we found no dated activity from the past 12 months.
- We added three contractors with 2026 evidence: A ACME Design, Hands@Windows and 9 Power Aluminium & Glass.
- ZGH Aluminium’s website now shows a different phone number from the one we listed before. We updated it.
- 2026 price guides put a single replacement window at roughly S$300 to S$1,200, depending on type.
- Singapore’s PSG, EDG and MRA grants closed on 29 Sep 2026. The EDGE Grant that replaces them is for businesses, not homeowners, so do not expect a grant to cover your window works.
HDB window contractors compared (Oct 2026)
| Company | Best for | Starting price | Area |
|---|---|---|---|
| AT Aluminium | Windows plus grilles and gates from one workshop | Quote-based (site says S$400–S$1,200 per window) | Woodlands |
| Express Windows | HDB and condo windows, casement glazing | Quote-based | Tampines |
| Home Aluminium | Pet-friendly slim grilles, sliding and casement windows | Quote-based | Address not published |
| ZGH Aluminium | Swing-and-slide windows from a factory maker | Quote-based | Woodlands |
| A ACME Design | Window repair plus glass doors and shower screens | Quote-based (blog cites S$350–S$950 per panel) | Ang Mo Kio |
| Hands@Windows | Window servicing, inspection and repair | Quote-based | Kaki Bukit |
| 9 Power Aluminium & Glass | Replacements with a stated 10-year warranty | Quote-based | Woodlands |
None of the seven publishes a fixed price list for windows. “Quote-based” means you must ask for a written quote.
What does HDB require for window works?
HDB’s window works page says you must use a window contractor approved by the Building and Construction Authority (BCA) and listed in HDB’s directory for all window installation and replacement. A renovation permit from HDB is needed for window replacement. The approved contractor applies for it.
HDB also says replacing full-height windows is strictly not allowed. Permission may be granted only where a damaged frame needs full replacement. You, as the owner, are responsible for keeping the windows in your flat in good condition.
The safety reason is real. BCA reported 35 cases of fallen windows in the first 11 months of 2023. Old hinges, worn rivets and loose frames are the usual weak points, so servicing matters as much as replacement.
BCA approval for windows sits under workhead RW01 in the BCA contractors registry. Ask for the contractor’s HDB licence or directory reference, then check it yourself on HDB’s list. A licence number on a website is a claim until you confirm it.
How much does HDB window work cost in Singapore (2026)?
These ranges come from published guides dated July to August 2026. They are guides, not quotes. Your price depends on window size, glass, hardware and how many units you do.
| Job type | Published range (S$) | Source |
|---|---|---|
| Top-hung window, supplied and installed | 350–700 each | RK E&C guide, 28 Aug 2026 |
| Casement window, supplied and installed | 450–900 each | RK E&C guide, 28 Aug 2026 |
| Sliding window, supplied and installed | 500–1,000 each | RK E&C guide, 28 Aug 2026 |
| Whole 4-room flat | 2,500–5,000 | RK E&C guide, 28 Aug 2026 |
| Full flat (6–8 windows) | 2,500–8,000 (typical 4,500) | H&L cost guide, Jul 2026 |
| Single window, any type | 300–1,200 (typical 600) | H&L cost guide, Jul 2026 |
| Glass panel replacement | 150–400 | RK E&C guide, 28 Aug 2026 |
| Hardware repair (hinges, rollers, handles) | 80–250 per window | RK E&C guide, 28 Aug 2026 |
| Gasket or seal replacement | 60–180 per window | RK E&C guide, 28 Aug 2026 |
| Casement rivet replacement | 50–120 per window | RK E&C guide, 28 Aug 2026 |
| Child safety restrictor | 40–100 each | RK E&C guide, 28 Aug 2026 |
Two contractors publish their own figures. AT Aluminium’s website says replacement typically costs S$400 to S$1,200 per window. A ACME Design’s July 2026 blog post says replacement starts at about S$350 and reaches S$950 per panel.
We found no sourced 2026 price for window grilles, so we do not quote one. Ask for grilles as a separate line on your quote.
Time on site is short. One guide says an experienced crew replaces a window in an existing opening in 2 to 4 hours. It also says made-to-order windows can take 2 to 8 weeks to arrive.
Check that the quote lists the permit application, removal of old frames, and whether GST is included. These are the items that most often get added later.
How we chose
We did not hire any of these contractors or inspect their work. This ranking rests on public records and each company’s own materials.
- Operating now: we needed dated evidence from the past 12 months, such as a current website promotion, a dated blog post, an ACRA annual return, or a recent third-party listing.
- Approved status: each business must state BCA and HDB approval. Where a licence number was published, we list it.
- Window focus: windows must be a core service, not a side line.
- Transparency: we favoured published addresses, named contacts and public price information.
- Reviews: we state a rating only where we saw it, and say where we saw it. Testimonials on a company’s own site are marked as such.
The seven are listed in no strict rank order. The first four are our existing listings, in their original order. The last three are new additions.
AT Aluminium
Best for
- Owners who want windows, grilles and a gate from one workshop
- Website
- ataluminium.com.sg
- Phone
- +65 8282 0116
- Address
- 39 Woodlands Close, MEGA@Woodlands #03-18/19, Singapore 737856
- Founded
- 2022 (per its website; ACRA lists AT Aluminium Pte Ltd, UEN 202233183H, registered 19 Sep 2022)
- Starting price
- Quote-based. Its website says window replacement typically costs S$400 to S$1,200 per window.
- Notable clients/projects
- None named. The site says it is “trusted by thousands of homeowners”, which we could not verify.
- Accreditations
- Shows HDB-licensed and BCA-approved logos. No licence numbers are published.
AT Aluminium sells aluminium windows alongside main gates, cat-proof grilles, window grilles and awnings. That makes it a one-stop option if you want gate, grilles and windows done together. Its ACRA record shows an annual return filed on 14 Jan 2026, and a September 2026 industry blog post still lists it as a window contractor.
What reviewers say: Its website displays Google reviews with a 5.0 rating from 34 reviews. The newest shown are dated March and April 2024, for example “Window grill installation completed within 2hours”. These are displayed on the company’s own site, and we did not check Google itself.
Pros
- ✓ Publishes a price range per window on its own site.
- ✓ Broad product range, including cat-proof grilles.
- ✓ Published street address and direct email.
Cons
- ✕ Young company, formed in 2022.
- ✕ No HDB licence number shown on the page.
- ✕ Newest reviews on its site date from early 2024.
Express Windows
Best for
- Owners who want repairs or replacement of casement, sliding or top-hung windows, in HDB or condo
- Website
- expresswindows.com.sg
- Phone
- +65 8771 1861
- Address
- 1 Tampines North Drive 1, #07-05/06 T-Space, Singapore 528559
- Price
- Quote-based. No prices are published.
- Notable clients/projects
- Its site shows an HDB flat in Bukit Batok and a condominium in Thomson, plus HDB, residential and commercial work.
- Accreditations
- Describes itself as BCA-certified for window installation and maintenance. No licence number is published.
- Founded: Its site says it started as ironmongers in the 1980s and has over 20 years of construction experience. ACRA lists the current business (UEN 53435154M) from 12 Jun 2021.
Express Windows handles aluminium windows, window grilles, aluminium doors and shower screens. Its sample work includes office casement glazing and glass sliding partitions, so it covers more than standard HDB jobs. ACRA shows the business as active, and a March 2026 industry listing names it at the same Tampines address.
What reviewers say: Its website carries two testimonials, from an HDB owner and a condo owner. Both mention a “reasonable” quote or price. Neither is dated, and both are on the company’s own site.
Pros
- ✓ Long trade background, starting in ironmongery.
- ✓ Handles both repair and new installation.
- ✓ Has done condo and commercial work, which suggests wider glazing skills.
Cons
- ✕ No published prices.
- ✕ The ACRA unit number (#07-31) differs from the one on its website, so confirm the address before visiting.
- ✕ No recent dated blog or social content on the site.
Home Aluminium
Best for
- Owners who want slim, pet-friendly grilles alongside new windows
- Website
- homealuminiumsg.com
- Phone
- +65 9003 6263
- Address
- Not published on its website
- Founded
- 2009 (per its website)
- Starting price
- Quote-based. The site describes its prices as factory-direct but publishes no figures.
- Notable clients/projects
- None named. It mentions HDB HIP windows and grilles work.
- Accreditations
- States BCA-approved and HDB-licensed. No licence number is published.
Home Aluminium Metal Works supplies and installs sliding, casement and top-hung windows, plus customised and pet-friendly slim grilles. Its homepage carried an October 2026 promotion when we checked, which is our dated sign that it is trading now.
What reviewers say: Its homepage states 108 Google reviews and 111 Facebook reviews, both at 5 stars, and features testimonials that mention installation often finishing in 4 to 10 hours. These figures come from the company’s own site, and we did not verify them on Google or Facebook.
Pros
- ✓ In business since 2009, per its own site.
- ✓ Current promotion shows active trading in October 2026.
- ✓ Many reviews are claimed on both Google and Facebook.
Cons
- ✕ No street address on the website, so you cannot visit a showroom from the page alone.
- ✕ No published prices or licence numbers.
- ✕ Uses a Gmail address rather than a company domain email.
ZGH Aluminium
Best for
- Owners who want a swing-and-slide window that is easier to clean from inside
- Website
- zghaluminium.com
- Phones
- +65 6264 3088, +65 8089 8128, +65 8288 9399
- Address
- 39 Woodlands Close, MEGA@Woodlands #03-43, Singapore 737856 (registered address of Ziam Gei Huat Aluminium Pte Ltd; a sister company, ZGH Pte Ltd, is at #03-40 in the same building)
- Price
- Quote-based. No prices are published.
- Shown on its website; we did not reproduce it because the page spelling looked inconsistent. Use the contact form or phone.
- Founded
- Its site says “19 years in the market”. ACRA lists Ziam Gei Huat Aluminium Pte Ltd from 3 May 2017 and ZGH Pte Ltd from 15 Nov 2025.
- Notable clients/projects
- None named. The site says it serves BTO, HDB, private and commercial properties.
- Accreditations
- States HDB-approved and BCA-approved. No licence number is published.
ZGH calls itself the sole manufacturer of its swing-and-slide windows. It also makes aluminium windows, window grilles and doors. ACRA shows Ziam Gei Huat Aluminium as a live company that filed its annual return on 30 Jun 2026, which is our dated sign of activity.
What reviewers say: Its website says its Google rating is “over 4.7 stars” but gives no review count or dated reviews. We could not confirm the figure, so treat it as a claim.
Pros
- ✓ Makes its own windows, so you deal with the maker.
- ✓ Specialist swing-and-slide design.
- ✓ Shows both a landline and a WhatsApp number.
Cons
- ✕ Two related company names, so confirm which entity holds the licence and issues your quote.
- ✕ No published prices, licence numbers or named projects.
- ✕ The “19 years” claim covers a trading history that predates both registered companies. Ask what it refers to.
A ACME Design
Best for
- Owners who want window repair or replacement and glass work from the same firm
- Website
- acmedesignsg.com
- Phones
- +65 8502 1919, +65 6444 3212
- Address
- 5056 Ang Mo Kio Industrial Park 2, #01-1165, Singapore 569559
- Founded
- 1998 (per its website)
- Starting price
- Quote-based. Its July 2026 blog post says window replacement starts at about S$350 and reaches S$950 per panel.
- Notable clients/projects
- Its portfolio mentions BTO projects, residential and commercial installations. No client names.
- Accreditations
- BCA-registered (RW01) and HDB-licensed, licence HB-01-3207G (per its website; check it on HDB’s list).
ACME Design installs aluminium windows and repairs windows and glass doors. It also does tempered glass doors, shower screens, glass railings and rubbish chute replacement. It publishes many cost and compliance guides. Its 2026 window cost guide was posted on 12 Jul 2026 and updated on 31 Aug 2026.
What reviewers say: Its website shows three 5-star testimonials. One says a problem was fixed “within 2 hrs”. Another calls it “the best one in recent times”. A third praises “excellent service and professionalism”. All are on the company’s own site and undated.
Pros
- ✓ One of the longest-running firms here, since 1998 per its site.
- ✓ Publishes a licence number and a price range.
- ✓ Recently updated content shows it is active.
Cons
- ✕ Windows are one of many services, so it is less of a pure window specialist.
- ✕ Its price range comes from its own marketing blog, not a quote.
- ✕ Testimonials on the site are undated.
Hands@Windows
Best for
- Owners with older windows who want an inspection and repair before deciding to replace
- Website
- window-servicing.com
- Phone
- +65 6749 2257
- Address
- 30 Kaki Bukit Road 3, #04-15 Empire TechnoCentre, Singapore 417819
- Price
- Quote-based. No prices are published.
- Founded
- Not stated
- Notable clients/projects
- None listed.
- Accreditations
- HDB licence HB-02-4485G and BCA-approved window contractor (per its website; check on HDB’s list).
Hands@Windows focuses on window servicing for HDB flats and condos. That includes inspection, repair and replacement. Its own site shows no 2026 content, and its footer still reads 2020. Our dated evidence is a review-site profile updated on 12 Aug 2026 and a March 2026 industry list that names it at the same address. That is weaker than for the others, so call ahead to confirm.
What reviewers say: The review site bestthingreview.com reported a 4.9 rating from 566 Google reviews, updated 12 Aug 2026. We did not see the Google page ourselves. It quotes one reviewer: “The inspection report was thorough and the replacement work was done in the same visit.”
Pros
- ✓ Servicing is its focus, not an add-on.
- ✓ HDB licence number is published.
- ✓ Large review base reported by a third-party site.
Cons
- ✕ Its website looks dated and shows no recent posts.
- ✕ No published prices or founding year.
- ✕ We could not read its Google profile ourselves.
9 Power Aluminium & Glass
Best for
- Owners who put warranty length first
- Website
- 9power.sg
- Phones
- +65 6250 2696, +65 9830 7457
- hello@9power.com.sg
- Address
- 71 Woodlands Avenue 10, #02-07 Woodlands Industrial Xchange, Singapore 737743
- Founded
- Not stated (ACRA UEN 201835588K)
- Starting price
- Quote-based. Its site says price depends on size, layout, material and glass type.
- Notable clients/projects
- Says 500+ projects, with examples in Tampines HDB flats and Bukit Timah landed homes.
- Accreditations
- BCA-approved under RW01, bizSAFE certified, HDB directory reference HB-01-5571Z (per its website; check on HDB’s list).
9 Power sells aluminium and glass windows and states a 10-year warranty on its products. Its website carries image uploads dated May, June and September 2026, and it published a blog post on 16 Sep 2026.
What reviewers say: We found no rating or review count that we could verify. Its own blog points readers to its Google profile. Check recent reviews there before you commit.
Pros
- ✓ States a 10-year product warranty. Ask for the terms in writing.
- ✓ Publishes licence and directory references.
- ✓ Recent site activity in September 2026.
Cons
- ✕ No published prices.
- ✕ No founding year or review rating on its site.
- ✕ The warranty claim covers “products”, so ask whether labour is included.
Which HDB window contractor should you choose?
- Loose, noisy or sticking windows: Start with an inspection and repair from Hands@Windows or A ACME Design. Hardware repairs cost far less than replacement.
- Full replacement with a strong warranty: Ask 9 Power Aluminium & Glass for its warranty terms in writing.
- Windows plus grilles and gate: Compare AT Aluminium and Home Aluminium. Both sell grilles alongside windows.
- Pets or young children: Home Aluminium lists pet-friendly slim grilles. Any contractor can also fit child safety restrictors, which one guide prices at S$40 to S$100.
- Easier cleaning of high-floor windows: Ask ZGH Aluminium about its swing-and-slide design.
- Condo or mixed glass work: Express Windows and A ACME Design both do work beyond HDB flats.
- New BTO flat: ZGH says it serves BTO homes, and ACME’s portfolio mentions BTO projects. Ask any contractor which BTO estates they have worked in, and for photos.
Whoever you pick, get at least two written quotes. Compare them line by line: window type, glass thickness, hardware, permit, removal and warranty.
Red flags to watch for
- No HDB listing: The firm cannot be found on HDB’s list of BCA-approved window contractors. Do not proceed.
- No permit: The contractor says a renovation permit is not needed. HDB requires one for window replacement.
- Full-height window replacement: A contractor who promises to replace full-height windows freely. HDB does not allow this except in limited cases.
- Verbal quotes only: No itemised, written quote with the window type, glass and hardware named.
- Large upfront payment: Pressure to pay most of the cost before any work starts.
- Vague warranty: A “lifetime” or “10-year” promise with no written terms covering parts and labour.
- Unverifiable claims: “Thousands of happy customers” with no named projects or dated reviews.
- Add-ons after the quote: Permit, removal or GST appearing as extra charges on the day.
Frequently Asked Questions
What is an HDB approved window contractor?
It is a company registered with BCA for window works (workhead RW01) and listed in HDB’s directory of renovation contractors. HDB says window installation and replacement in its flats must be done by such a contractor.
How do I check that a contractor is HDB licensed or BCA approved?
Ask for their HDB licence or directory reference. Then look the company up on HDB’s list of BCA-approved window contractors and in the BCA registry. Match the company name, not just the brand name.
How much does an HDB window contractor charge?
A 2026 guide puts supplied-and-installed windows at S$350 to S$700 for top-hung, S$450 to S$900 for casement and S$500 to S$1,000 for sliding. A whole 4-room flat is S$2,500 to S$5,000. Get a written quote for your own flat.
How much does HDB window repair cost?
The same guide lists hardware repairs at S$80 to S$250 per window, gasket replacement at S$60 to S$180 and casement rivet replacement at S$50 to S$120. A glass panel is S$150 to S$400.
Do I need a permit to replace my HDB windows?
Yes. HDB says a renovation permit is needed for window replacement. The approved contractor applies for it. Confirm in writing that the permit is included in your quote.
Can I replace the full-height windows in my HDB flat?
HDB says replacing full-height windows is strictly not allowed. Permission may be granted if a damaged frame needs complete replacement. Ask HDB before you commit.
Who is the best HDB window grille contractor?
Several firms here make grilles. AT Aluminium and Home Aluminium both list grilles prominently, and Home Aluminium lists pet-friendly slim grilles. We found no sourced grille prices, so compare written quotes. Also confirm any grille work follows HDB’s guidelines.
Which window installer has experience with BTO flats?
ZGH Aluminium says it serves BTO homes, and A ACME Design’s portfolio mentions BTO projects. We could not verify specific BTO estates for any contractor, so ask for photos and addresses of past BTO jobs.
What window types are common in HDB flats?
Casement, sliding, top-hung and louvre windows are common. Casement windows need extra care in hinge and rivet checks, as they swing outward. Ask your contractor to inspect these before and after any work.
Are Home Aluminium reviews good?
Its homepage claims 108 Google reviews and 111 Facebook reviews, all at 5 stars. We did not verify these on Google or Facebook. Read recent reviews there yourself before you decide.
Are ZGH Aluminium reviews good?
Its website claims a Google rating of over 4.7 stars. It shows no review count, and we could not verify it. Read recent Google reviews and ask for references.
How long does window replacement take?
One guide says an experienced crew replaces a window in an existing opening in 2 to 4 hours. Made-to-order windows can take 2 to 8 weeks to arrive, so plan around delivery.
Will a grant pay for my window works?
We found no grant that covers HDB window replacement for homeowners. The PSG, EDG and MRA business grants closed on 29 Sep 2026, and the EDGE Grant that replaces them is for businesses. Do not budget for a grant.
Who is responsible if my window falls?
HDB says the flat owner is responsible for keeping the windows in good condition. Service your windows regularly, and replace worn hinges, rivets and frames early.
Sources
Checked on 8 October 2026. Prices and hours change; confirm with the business before you go.
- hdb.gov.sg — BCA-approved contractor rule, full-height window rule, owner responsibility
- rkec.sg — Cost table (guide dated 28 Aug 2026)
- handld.org — Cost ranges, install time and lead time (Jul 2026)
- acmedesignsg.com — ACME address, licence, price range, testimonials
- acmedesignsg.com — ACME contact details, founding year, services
- ataluminium.com.sg — AT Aluminium address, phone, price range, Google reviews shown on site
- scam.sg — AT Aluminium ACRA live, registered 19 Sep 2022, AR 14 Jan 2026 (search snippet)
- expresswindows.com.sg — Express Windows address, phone, history, testimonials
- acrawatch.sg — Express Windows ACRA active, UEN 53435154M (search snippet)
- bestinsingapore.co — Third-party Mar 2026 list naming Express, Hands@Windows, Grilles N Glass
- homealuminiumsg.com — Home Aluminium contact, Oct 2026 promotion, claimed review counts
- zghaluminium.com — ZGH current phone, claims
- recordowl.com — ACRA live, incorporated 3 May 2017, AR filed 30 Jun 2026
- straitsdata.com — ZGH Pte Ltd incorporated 15 Nov 2025, same building
- window-servicing.com — Hands@Windows contact and HDB licence
- bestthingreview.com — Hands@Windows 4.9 / 566 Google reviews as reported, updated 12 Aug 2026
- 9power.sg — 9 Power contact, accreditations, 2026 uploads
- 9power.sg — 9 Power post dated 16 Sep 2026, warranty claim, AT Aluminium mention
- isomer-user-content.by.gov.sg — 35 fallen-window cases in first 11 months of 2023 (title only; document not opened)