HDB Corridor Window: Everything Singapore Homeowners Need to Know (2026 Complete Guide)
- Jul 5
- 8 min read
If your HDB bedroom or living room faces the common corridor, privacy is probably one of your biggest concerns.
And if you stay near a lift lobby? Aiyoh. Good luck.
Many homeowners want to keep their corridor window open for ventilation but feel uncomfortable when neighbours, visitors, delivery personnel, or cleaners walk past and can see directly into their home. Some end up keeping curtains drawn all day — which defeats the whole point of having a window.
The good news: today there are better HDB corridor window options. This guide compares five popular solutions so you can choose based on your actual priorities — privacy, ventilation, noise reduction, and budget.
Can You Replace Your Corridor Window in HDB?
Yes. HDB homeowners are allowed to replace their existing corridor windows as long as the window complies with HDB requirements and is installed by a licensed window contractor, with the necessary permit applied.
Many older flats were originally fitted with adjustable louvre windows — great for ventilation, but very bad for sound insulation. Today, sliding windows are the most popular choice because they are safer, easier to maintain, and do not obstruct the common corridor.
If your existing window is difficult to open, noisy, or no longer provides sufficient privacy, replacing it can significantly improve your living environment for you and your family.
Why Privacy and Noise Are Common Problems for Corridor-Facing Units
Unlike corner units, many HDB flats have windows facing directly towards the common corridor. This creates a few familiar problems.
People Can See Directly Into Your Home
When a corridor-facing window is open, anyone walking past can easily see in — your bedroom, your sofa, your breakfast in your pyjamas. Not exactly the open house vibe you were going for.
Curtains Reduce Airflow
While curtains improve privacy, they also block ventilation. Rooms feel warmer and stuffier, especially during the afternoon. Singapore weather being what it is, this makes a lot of difference. Running the air conditioner the whole day is not ideal for your health — or your electricity bill.
Corridor Noise Enters the Home
Units near lifts, staircases, or high-traffic corridors experience noise from neighbours talking, children playing, lift arrivals, delivery personnel, and vacuum cleaning.
One of our customers — a night shift worker — came to us with serious eye bags. A new neighbour had just moved in and the corridor noise made it impossible to sleep during the day. He had already approached other companies, but one told him he would need to wait 8 weeks for a double glazed solution as the product came from China.
Eight weeks. The man needed sleep for his sanity.
We got him sorted in 3 weeks with our double glazed window, manufactured locally. His wife texted us one month later to say her husband is now a happy man again.
Option 1: Standard Sliding Window — from $320 (2 Panel, Standard Size)
The standard sliding window remains the most common HDB corridor window. Panels slide horizontally, ventilation is excellent, and it is the most accessible price point.
For homeowners simply replacing an old window without major concerns about privacy or noise, this remains a practical and HDB-compliant choice.
Advantages of standard sliding window
Most affordable option
Easy to operate and low maintenance
Excellent ventilation
Limitations of standard sliding window
When the window is open, people walking along the corridor can see directly into the room. Most homeowners end up pairing it with curtains or blinds — which partially cancels out the ventilation benefit. Efficient? Not really.
Standard Sliding Winddow Is Suitable for: Homeowners with a limited budget, or those who run the air conditioner most of the day, or are rarely home.
Option 2: Sliding Window with Top Hung — from $470 (2 Panel, Standard Size)
For many years, this was considered the go-to upgrade for corridor-facing HDB units.
This design combines sliding panels at the bottom with top hung windows above.
The bottom sliding section stays closed for privacy while the top hung section opens to provide ventilation — giving you both at the same time.
One thing to note: the top hung opening cannot be made very large, as it pushes outward and could hit someone walking past in the corridor.
Advantages of top hung sliding window
Better privacy than a standard sliding window
Improved ventilation
Popular and proven design
Limitations of top hung sliding window
Ventilation is limited to the top hung opening area, which is relatively small.
Top hung sliding window is suitable for: Homeowners wanting a proven, budget-friendly upgrade from a standard sliding window.
Option 3: Double Section Sliding Window — from $520 (2 Panel, Standard Size)
One of the more popular modern upgrades for HDB corridor windows, the Double Section Sliding Window divides the window into two independent sliding sections — upper and lower — that operate separately.
The idea is simple but effective: keep the lower section closed and slide open the upper section for ventilation. Because the opening is positioned higher up, people walking past cannot easily see directly into the room.
Advantages of Double Section Sliding Window
Better privacy with good ventilation
Modern appearance
Our Prime Profile Double Section Sliding Window is our most recommended choice for HDB corridor windows. Privacy is good, ventilation is good, and the prime sliding profile is more durable with better seals — reducing the gap between panels, which means less corridor dust entering your home when the window is closed.
Double section sliding window is suitable for: Corridor-facing bedrooms and living rooms. Homeowners who want a meaningful upgrade without going to the top of the range.
Option 4: Vertical Sliding Window — from $900 (2 Panel, Standard Size)
The Vertical Sliding Window is one of the newest HDB corridor window designs available — and Ho Ho Engineering and Renovation Works is proud to be the first company in Singapore to install it in HDB corridors.
Unlike traditional windows that slide left and right, the panels move vertically — up and down. This fundamentally changes how you control privacy and airflow.
How Does It Work?
The panel slides downward, keeping the lower section closed while opening the top for ventilation. You control exactly how much air comes in and where the opening sits.
Result: people walking along the corridor cannot see into your room, even when the window is fully open.
Why It Is the Best Sliding Option for Privacy
With a conventional sliding window — left or right — when you open it, the gap is at eye level. Anyone walking past has a direct line of sight into your room.
With a Vertical Sliding Window, the opening is at the top. Corridor traffic sees nothing. You get the airflow; your neighbours do not get the entertainment.
Advantages of Vertical Sliding Window
Best privacy of all sliding window designs
Excellent ventilation
Modern, unique appearance
HDB approved
Manufactured locally — 2 to 3 weeks lead time vs. 6 to 8 weeks from overseas suppliers
Vertical sliding window is suitable for: Corridor-facing bedrooms and living rooms. Homeowners who want maximum privacy without sacrificing airflow.
Option 5: Double Glazed Bottom Fixed Window with Top Hung — from $1,400 (Best for Noise Reduction)
If privacy and noise reduction are your top priorities, this is the most effective solution available — and yes, it is the most expensive. But there is a very good reason for that.
The lower section is permanently fixed. The upper section uses top hung windows for ventilation. Paired with 18mm double glazed glass, this design addresses the core weakness of all sliding window designs: the gap.
Why Double Glazed Glass Makes a Difference
Double glazed glass consists of two panes separated by an insulating air gap. Compared to standard single-glazed glass, it significantly reduces:
Corridor noise and neighbour conversations
Lift arrival sounds
Traffic noise from nearby roads
Baby crying from next door (you know who you are)
But glass alone is only part of the story. The reason this design outperforms double glazed sliding windows from other companies is that the fixed lower panel has no moving parts and no track gaps. There is nowhere for sound to sneak through.
A sliding window with double glazed glass still has a track gap. This design does not. That is the actual difference.
Privacy Benefits
Because the lower section is permanently fixed, visibility into the room is greatly reduced. Even with the top hung section open for ventilation, passers-by cannot see in.
Advantages Double Glazed Bottom Fixed Window with Top Hung
Excellent privacy
Best noise insulation of any option — no track gaps
Double Glazed Bottom Fixed Window with Top Hung Is Suitable for: Homeowners sensitive to noise, units near lift lobbies or high-traffic corridors, bedrooms facing busy corridors, and anyone who has had a noisy neighbour and knows exactly how much it affects quality of life.
Which HDB Corridor Window Should You Choose?
Priority | Best Option | Starting Price For 2 Panel Window |
Most affordable | Standard Sliding Window | $320 |
Proven upgrade | Sliding + Top Hung | $470 |
Privacy + ventilation | Double Section Sliding | $520 |
Best privacy (sliding) | Vertical Sliding Window | $900 |
Noise reduction | Bottom Fixed + Top Hung (Double Glazed) | $1,400 |
Budget is the priority: Standard Sliding Window at $320 is reliable
Want a proven upgrade: Sliding + Top Hung at $470 gives better privacy with comfortable ventilation.
Privacy is the main concern: Double Section Sliding at $520, or the Vertical Sliding Window at $900 for the best privacy of any sliding design.
Noise is keeping you up: Bottom Fixed + Top Hung with 18mm double glazed glass. This works because there are no gaps — not because the glass is magic.
Frequently Asked Questions About HDB Corridor Windows
Can I replace my existing HDB corridor window? Yes. HDB homeowners can replace their corridor windows provided the installation complies with HDB requirements, is carried out by a licensed contractor, and the necessary permit has been applied for.
What is the best HDB corridor window for privacy? The Vertical Sliding Window gives the best privacy of any sliding design because the opening is positioned at the top, out of the line of sight of people walking past. Ho Ho is proud to be the first company in Singapore to install it in HDB corridors.
Is the Vertical Sliding Window HDB approved? Yes. Our Vertical Sliding Window complies with HDB requirements.
Some company advertise double glazed sliding windows for noise reduction. Does it actually work? Double glazed glass does help — but a sliding window has a gap at the track where sound enters regardless of the glass. For genuine noise reduction, you need a fixed lower panel with no gaps. That is why the Bottom Fixed + Top Hung option is more effective.
How long does installation take? Our windows are manufactured locally and typically take 2 to 3 weeks. Suppliers sourcing from overseas may quote 6 to 8 weeks.
Should I use frosted glass? Frosted glass improves privacy but reduces natural light and the view outside. A better approach is usually to choose a window design that provides privacy through its opening position. You can also combine frosted glass with any of the above designs for extra privacy.
Do I need a window grille? Window grilles are typically installed for safety, child protection, or pet protection. They do not significantly affect privacy — that is determined by the window design.
Final Thoughts on HDB Corridor Windows
Singapore flats are not getting any quieter. More neighbours, more deliveries, more corridor traffic — and most of us still want to open a window without feeling like we live in a fishbowl.
The right corridor window makes a real difference. Standard sliding windows are fine for low-traffic units. For corridor-facing bedrooms, a Double Section Sliding or Vertical Sliding Window gives you privacy without sealing yourself in. If noise is genuinely affecting your sleep or your ability to work from home, the Bottom Fixed + Top Hung with 18mm double glazed glass is the most effective solution — because it eliminates the gap problem that limits every sliding design on the market.
If you are not sure which option suits your flat, send us a photo of your existing window with the rough width and height. Our team will recommend the most suitable solution based on your corridor situation, noise concerns, and budget.
No eye bags required.
Visit our showroom to find out more. www.hohodoorsingapore.com
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