How much does window installation & replacement cost in Hong Kong?
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Key takeaways
- Most window installation & replacement jobs in Hong Kong land between HK$2,000–HK$35,000 — known locally as window replacement (minor works).
- Hong Kong operates the Mandatory Window Inspection Scheme for buildings over 10 years old, and window replacement falls under the Minor Works Control System requiring registered contractors. Typhoon exposure makes fixing integrity and hardware quality safety-critical.
- Prices below are researched national ranges, updated July 2026 — not quotes.
Window Installation & Replacement prices by job size in Hong Kong
| Job size | Low | Typical | High |
|---|---|---|---|
| Single window replacement Replace one aluminium window, registered contractor | HK$2,000 | HK$4,000 | HK$8,000 |
| Three windows Replace three windows, one visit | HK$6,000 | HK$11,000 | HK$20,000 |
| Whole flat (5-6 windows) Replace all windows in a typical flat | HK$12,000 | HK$20,000 | HK$35,000 |
Per-unit rates
| Unit | Low | Typical | High |
|---|---|---|---|
| per window (installed, aluminium) | HK$2,000 | HK$4,000 | HK$8,000 |
What affects the price
- Job size and scope — bigger or more complex jobs move you up the ranges above.
- Access and condition — hard-to-reach areas, older properties or neglected maintenance add labour time.
- Materials and quality level — where materials are involved, the grade you choose often matters more than labour.
- Urgency — same-day or out-of-hours work usually carries a premium.
- Where you live — large metros in Hong Kong typically run above the national range; smaller towns below it.
How to save
- Get at least three quotes and compare like-for-like scopes, not just totals.
- Be flexible on timing — off-peak slots are often cheaper.
- Bundle related tasks into one visit to spread call-out costs.
- Agree the scope in writing up front to avoid change-order surprises.
How to hire a window installation & replacement pro in Hong Kong
- Window replacement is minor works under the Buildings Ordinance — use a registered contractor appropriate to the works class
- If your building is under the Mandatory Window Inspection Scheme (MWIS, buildings over 10 years), coordinate replacement with the QP inspection
- Confirm aluminium frame spec and typhoon-rated hardware
- Register works with building management and observe permitted hours
- Get per-window written pricing with disposal and sealing included
- Check the contractor's track record with your estate's window type
Red flags
- Unregistered contractor for works needing Minor Works registration
- No MWIS awareness in an older building
- Reuses corroded fixings into spalled concrete without repair
- Lump-sum quote with no per-window breakdown
- Most payment demanded upfront
How Handld researches prices
These are researched estimates, not quotes and not our transaction data. We compile ranges from published sources — national statistics, trade bodies and incumbent cost guides — normalise them to HKD, and adjust city pages by a population-based cost tier. Last updated July 2026. Basis: HK Buildings Department MWIS guidance; HK window contractor quotes.
Frequently asked questions
Can windows be replaced in winter or bad weather?
Yes — pros replace one opening at a time so the house is never fully open, and cold-weather installation is routine in cold climates. Sealants and foams have temperature limits, so extreme cold or rain may shift a schedule, but winter is often the quieter, cheaper season to book.
How much does window replacement cost?
Windows are priced per opening: the unit itself (frame material, glazing spec, size) plus installation labour. A standard-size replacement in an existing opening is the base case; enlarging openings, upper-floor access, bay windows and heritage styles add meaningfully. Whole-house jobs get per-window discounts.
Why is my double glazing misted up between the panes?
The sealed unit has failed and let moist air in. The fix is usually replacing just the glass unit, not the whole frame — a fraction of full replacement cost. Widespread misting across many windows of the same age suggests the batch is failing and full replacement may be better value.
How long does window installation take?
Replacing a window in an existing opening takes 2-4 hours per window for an experienced crew — a whole house is usually 1-3 days. The wait is in manufacturing: made-to-measure windows typically take 2-8 weeks from survey to fitting.
What should a window installation quote include?
Per-window pricing with glazing spec, removal and disposal of old windows, making good internal reveals and external sealing, hardware, and warranty terms for both the unit (often 10 years) and the installation. Cheap quotes commonly exclude making-good — the messiest part.
What is the Mandatory Window Inspection Scheme?
Buildings aged over 10 years can be served MWIS notices requiring windows to be inspected by a Qualified Person and repaired by registered contractors every 5 years. If you've received a notice, bundle any replacement into the compliance works.
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