The leak you are ignoring today might cost your wallet a heavy loss tomorrow!
We’ve all been there — you step onto your balcony after a rainstorm, and something feels off. There’s that musty smell, a wet patch that wasn’t there before, or worse… your neighbour knocks to tell you there’s water leaking into their unit.
In Singapore, where high-rise living is common, balcony waterproofing isn’t just about comfort — it’s about responsibility. But let’s face it: cost is the first thing most people worry about.
As experts at Allseal Waterproofing PTE Ltd, we often hear one big question: “How much will this cost me?” The answer? It depends — but this guide will help you understand what you’re paying for, avoid hidden charges, and plan your budget without stress.
Why Ignoring a Leaky Balcony is a Costly Mistake
Water damage doesn’t go away on its own. In fact, it only gets worse over time — and more expensive.
Structural Damage: The Hidden Danger Beneath the Surface
Water doesn’t just stain your walls — it seeps into the structure.
Over time, this can lead to corroded steel bars, weakened concrete, and even floor sagging. We’ve seen cases where the repair bill ran into tens of thousands — all from a small leak that was ignored for too long.
Mould and Health Hazards: More Than Just an Eyesore
That black stuff growing on your wall? It’s not just ugly. It could be toxic mould.
Prolonged dampness creates the perfect home for mould spores, which can lead to respiratory issues, especially for kids and elderly folks.
Neighbourly Disputes and MCST Woes
In condos and HDB flats, one leak can affect many units.
Balcony leak repair in Singapore isn’t just about fixing your own space — it could involve legal or MCST trouble if your leak damages the unit below.
At Allseal Waterproofing, we’ve helped many condo owners navigate MCST approvals for professional waterproofing services in Singapore to avoid exactly these problems.
So, How Much Does Balcony Waterproofing Really Cost?
Let’s break it down clearly. You’ll see why prices vary — and what affects them the most.
The Short Answer: A Price Range
For most standard balconies in Singapore, you can expect to pay:
$500 to $4,500+ SGD
(depending on size, method, and condition)
Yes, it’s a wide range. That’s because every balcony is different. But below, we’ll help you find your spot on that scale.
Key Factor #1: The Size of Your Balcony
Waterproofing is usually charged per square foot (psf) or per square meter.
| Balcony Size | Approx. Area | Estimated Cost Range (SGD) |
| Small (20–50 sq ft) | ~1.8–4.6 sqm | $800 – $1,800 |
| Medium (50–100 sq ft) | ~4.6–9.3 sqm | $1,500 – $3,000 |
| Large (100+ sq ft) | 9.3+ sqm | $2,500 – $4,500+ |
Prices vary depending on accessibility and prep work needed. At Allseal, our team always inspects the site before giving a detailed quote — no surprises later.
Key Factor #2: HDB vs. Private Condo vs. Landed Property
Your property type also affects cost.
- HDB Flats: Lower access difficulty, but some areas may be shared with neighbours.
Estimated cost: $1,000 – $2,000 - Condos: Often need MCST approval, and special care is needed to meet condo rules.
Estimated cost: $1,500 – $3,000 - Landed Properties: Higher ceilings, scaffolding, and larger balcony spaces = more cost.
Estimated cost: $2,500 – $4,500+
Key Factor #3: The Waterproofing Method Matters
Different balcony waterproofing methods come with different price tags.
Liquid Waterproofing Membrane (Most Common)
- Pros: Seamless, flexible, adapts to surface movement
- Cost: $8 – $15 per sq ft
Cementitious Waterproofing
- Pros: Good for internal waterproofing, cost-effective
- Cost: $7 – $12 per sq ft
Sheet Membrane Waterproofing (Premium)
- Pros: High durability, great for long-term use
- Cost: $15 – $25 per sq ft
We usually recommend liquid membrane for most balcony jobs due to its balance between price and performance — and it works well in Singapore’s wet climate. You can read more in our guide to the Best Balcony Waterproofing Membranes in Singapore.
Beyond the Basics: Other Costs to Consider
It’s not just the waterproofing layer you’re paying for. Let’s look at what else can affect your final bill.
Surface Preparation: The Most Critical Step
Before applying anything, the old layer needs to go.
- Hacking tiles: $300 – $800
- Removing old membrane: $200 – $600
- Surface levelling: $150 – $400
Skipping this step is the biggest mistake we see from cheap contractors. At Allseal, we never apply new waterproofing over damaged surfaces.
The Price of Repairs: What If There’s Already Damage?
If your balcony already has cracks, hollow tiles, or damaged concrete, repairs will cost extra.
- Concrete patching: $200 – $700
- Re-plastering: $300 – $900
That’s why early detection helps. The earlier you fix a small leak, the cheaper it is.
The “Aftermath”: Re-tiling and Finishing Costs
Waterproofing usually ends at the membrane. If you want new tiles, that’s a separate job.
- Tiling works: $10 – $25 per sq ft
- Skirting or finishing: $100 – $300
Many clients assume re-tiling is included — but most Singapore home waterproofing quotes don’t include this unless you ask.
5 Pro Tips to Get the Best Value on Your Waterproofing Project
Don’t just look at the numbers. A good deal is about quality, transparency, and experience.
Tip #1: Don’t Just Choose the Cheapest Quote
Lowball quotes often mean skipped prep work or poor materials.
We’ve been called in too many times to fix failed waterproofing jobs that lasted only a few months. What saved money then cost more later.
Tip #2: Check for Case Studies and Reviews
Ask your contractor for photos or examples of past work.
At Allseal Waterproofing, we show clients real before-and-after photos of balcony waterproofing in Singapore, including HDB and condo units.
Tip #3: Understand the Warranty
A solid warranty gives peace of mind.
Look for:
- 4–6 years warranty
- Covers both labour and materials
Don’t settle for vague promises like “we’ll take care of it if anything happens.”
Tip #4: Ask About the Full Process
A good contractor should walk you through the process, step by step.
Need guidance? Check out our practical 9 Tips to Waterproof a Balcony Like a Pro Before Tiling
Tip #5: Time It Right
In Singapore, we get a lot of rain.
Try to plan your project during dry months (typically February to April or June to August). This allows proper curing time and ensures the waterproofing sets well.
Ending Notes
Waterproofing a balcony in Singapore isn’t just another renovation — it’s protection for your home, health, and neighbours. Yes, it comes with a cost, but cutting corners often leads to even bigger bills down the road.
At Allseal Waterproofing PTE Ltd, we’ve helped hundreds of homeowners find the right solution — whether it’s HDB balcony waterproofing cost concerns or dealing with MCST approvals in private condos.
Quality materials, expert prep, and honest pricing — that’s what we believe in.
Ready to get an accurate quote for your specific balcony? Why not talk to a trusted local specialist and find out how much you could save by doing it right the first time?
Ready to protect your home the right way?
Let a Waterproofing Specialist in Singapore
