Open any Dubai service charge invoice and look at the chargeable area. It is almost always larger than the usable interior of your unit. The reason is the balcony.
Under the standard RERA-aligned approach used by most owner associations in Dubai, balcony area is included in the service charge calculation at a rate of 25 percent of its measured square footage. So a 200 square foot balcony adds 50 square feet to your chargeable area. At a typical Dh18 per square foot service charge, that is Dh900 a year. Sounds small. On a Dh1.2 million one bedroom renting at Dh84,000, that Dh900 alone is 0.075 percent of net yield, every year, just for that strip of outdoor space you might not even use.
Multiply this across a portfolio and the effect compounds.
Why 25 percent
The 25 percent rate is a convention, not a law. The thinking is that balconies require some shared upkeep (waterproofing, exterior cladding, drainage) but cost less than fully enclosed interior space. The number varies slightly by building, with some newer towers using 30 percent and a few older buildings using 20. The default in most managed communities is 25.
What that means in practice: if your title deed says your unit is 950 sqft and you have a 200 sqft balcony, your service charge invoice will be calculated on roughly 1,000 sqft. If you assumed it was 950, you were under-budgeting by about 5 percent.
How this hits your yield calculation
Let me run the math on a real example.
Two-bedroom unit, Business Bay. Interior 1,100 sqft. Balcony 280 sqft. Service charge rate Dh20 per sqft.
- Naive calculation (interior only): 1,100 x Dh20 = Dh22,000 a year.
- Actual calculation (interior + 25 percent of balcony): (1,100 + 70) x Dh20 = Dh23,400 a year.
- Difference: Dh1,400 a year.
If the property cost Dh1.9 million and rents for Dh125,000, the gross yield is 6.6 percent. After the Dh23,400 service charge and other costs, net yield works out around 4.1 percent. If you had used the naive number, you would have estimated 4.18 percent. Off by 0.08 points.
That looks small. Now stack it across five properties in your portfolio. You are off by Dh7,000 a year in expected cash flow. At a 6 percent discount rate, that is a Dh116,000 swing in your portfolio value calculation.
Why agents leave it out
Two reasons. One, the chargeable area number requires you to ask the developer or the owner association directly. The brochure quotes interior square footage. The invoice uses something different. Some agents do not know the difference. Others know but it is awkward to bring up in a sales conversation.
Two, the building's annual service charge budget is what actually determines the per sqft rate, and that budget moves. A new chiller, a re-cladding project, a pool refurbishment all push the per sqft rate higher next year. The 25 percent balcony rule is just a multiplier on whatever the per sqft rate becomes.
What to ask before you buy
Three questions for the seller, in writing.
1. What is the chargeable area on the current service charge invoice for this exact unit? 2. What is the current per sqft rate, and what was last year's? 3. Is there any approved capex project that will lift the per sqft rate in the next 12 to 24 months?
If the answers are inconsistent or vague, you have not done the diligence yet. A 5 percent estimation error on service charge is the difference between a property that pays for itself and one that needs a top up from your salary each year.
How to model it correctly
Use the yield calculator on this site. Enter your interior square footage and your balcony square footage separately. The calculator will automatically apply the 25 percent rule and show you the correct chargeable area plus the correct net yield. Toggle the rule off to see what the naive number looks like. The gap is your education.
Three rules of thumb:
- If your unit is a one bedroom with no balcony, ignore this. Your service charge is straightforward.
- If your unit has a balcony larger than 15 percent of the interior area, this matters.
- If your unit is on a higher floor with a wraparound balcony, this matters a lot. Some penthouses have balconies that equal the interior in size. The chargeable area on those can be 25 percent higher than buyers realise.
Source: standard owner association service charge formulas observed across 18 Dubai master communities, RERA service charge approval framework, my own invoice review on units I have sold and managed.