Semi-Gross vs Nett Area at Tower Angelo, Casa Grande

Semi-gross vs nett area: why the brochure size can feel bigger

In Jakarta's vertical property market, sales brochures often cause confusion. A unit may be listed at 100 m2, yet the space you can actually use feels smaller when you walk in. The reason is that there are two measurement standards: semi-gross area and nett area.

Tower Angelo is part of Casa Grande Residence Phase II. For a buyer, and for a renter who wants to understand what the owner is charged for, knowing the efficiency ratio between the two figures matters for the value of the unit in 2026.

What is semi-gross area?

Semi-gross is the figure developers use most in marketing materials and when setting the selling price. It counts not only the area inside your unit walls, but also a proportional share of public areas on the same floor.

At Tower Angelo, because it is positioned as a luxury residence, public areas such as the private lift lobby contribute significantly to your semi-gross figure.

• Nett unit area: the interior space you actually occupy.
• Wall thickness: half the thickness of the walls between units or on the outside.
• Corridor area: the hallway in front of your unit, shared proportionally with other units on the same floor.
• Shared facilities on the floor: including the lift area, emergency stairs and lift lobby.

What is nett area?

Nett area is the real area inside the unit, measured from wall to wall. This is the space where you place furniture, lay carpet and live day to day.

It matters because the ratio between nett and semi-gross shows how much of a "space tax" you pay for shared facilities.

• Interior planning: designers work only from the nett area.
• Comfort: it decides whether an L-shaped sofa or an 8-seat dining table will really fit.
• Efficiency ratio: the comparison of nett to semi-gross area.

Typical sizes at Tower Angelo

Tower Angelo is known for spacious units, from 2 Bedroom to 3 Bedroom types with a private lift. The source gives these figures as illustrations based on Pakuwon Group development standards at Casa Grande Phase II, not as confirmed unit data. Always check the attachment to your PPJB (Perjanjian Pengikatan Jual Beli, the sale and purchase binding agreement).

The source gives these estimates: a 2 Bedroom (Private Lift) at 115 m2 semi-gross and about 95 m2 nett, a ratio of about 82%. A 3 Bedroom (Private Lift) is 145 m2 semi-gross and about 120 m2 nett, about 83%. A 3 Bedroom Luxury is 168 m2 semi-gross and about 140 m2 nett, about 83%.

Why the gap is noticeable at Tower Angelo

Tower Angelo offers more exclusive facilities than the first-phase towers. Two factors affect the semi-gross figure.

Private lift

Units at Tower Angelo are generally equipped with private lift access. The lift lobby counts toward semi-gross because it is treated as dedicated to that unit, even though it is physically outside the main door.

Thicker walls

Luxury homes use better soundproof materials. Thicker walls improve privacy, but they also take a small share of the semi-gross area when measured from the middle of the wall.

Financial impact: service charge and IPL

For owners at Casa Grande, the size difference is not just a figure on paper. It directly affects monthly costs. IPL (Iuran Pengelolaan Lingkungan) is the monthly service charge, and the service charge and sinking fund are almost always calculated on semi-gross area.

Property tax (PBB) also refers to the area stated on the certificate, which usually follows the semi-gross standard or the legally recognised building area. So with a 168 m2 unit at Angelo, you pay maintenance for 168 m2, even if the space you clean each day may be only 140 m2. If you rent, ask the owner or agent how these costs are handled.

What to check before you buy or sign

These practical tips come from the source article for buyers and investors in 2026.

• Ask for a scaled floor plan: not just the 3D layout, but an architectural plan showing wall-to-wall sizes in millimetres.
• Check the certificate (SHMSRS, the strata title certificate): make sure the area stated matches what was promised in the PPJB.
• Work out the real price per m2: divide the total price by the nett area, not the semi-gross area, to compare fairly with other towers or apartments.
• Consider the efficiency ratio: an apartment below 80% may feel very tight for its price. Tower Angelo usually keeps the ratio at 80-85%, which is considered very good for luxury apartments.

Ready to compare units at Tower Angelo?

Tower Angelo remains a leading choice for living in South Jakarta because of its link to Mall Kota Kasablanka and its premium build quality. Decisions based on accurate technical data will give you the space you expect.

Contact our team to ask for floor plans and confirm the nett and semi-gross figures of the unit you are considering.

Frequently Asked Questions

What is the difference between semi-gross and nett area?

Semi-gross includes the unit interior, half the wall thickness and a proportional share of corridors and shared floor areas. Nett is the area inside the unit, measured wall to wall.

Which area is used to calculate IPL?

According to the source, the service charge and sinking fund are almost always calculated on semi-gross area.

What efficiency ratio is normal at Tower Angelo?

The source says Tower Angelo usually keeps the ratio at 80-85%, which is considered very good for luxury apartments.

What should I check before signing a purchase agreement?

Ask for a scaled floor plan, and check that the area on the SHMSRS certificate matches what the PPJB promises.

Are the unit sizes in this article official?

No. They are illustrations based on Pakuwon Group development standards at Casa Grande Phase II. Check the PPJB attachment.