GFA Harmonisation Singapore: Policy Overview (2026)
URA's GFA Harmonisation policy - impact on strata area, air-con ledges, property pricing
Mervin Yu
GFA Harmonisation remains a pivotal regulatory framework in the Singapore property development sector. Officially implemented on 1 June 2023, this policy synchronized the definition of Gross Floor Area (GFA) across four key government agencies: URA, SLA, BCA, and SCDF. Now in 2026, the market has fully adapted to these standards, which have fundamentally altered how condominiums are priced, designed, and presented to consumers.
What is GFA Harmonisation?
Before June 2023, developers operated under conflicting measurement standards. The Urban Redevelopment Authority (URA) measured floor area differently from the Singapore Land Authority (SLA), Building and Construction Authority (BCA), and Singapore Civil Defence Force (SCDF). This often created "grey areas" where developers could sell space to buyers (as strata area) that did not count towards the gross floor area (GFA) tax.
The Harmonisation of Floor Area Definitions circular mandated a unified standard that is now the industry norm:
- Measurement Standard: All agencies measure floor area to the middle of the wall.
- Inclusion: All strata areas (saleable space) must be included in the total GFA count.
- Exclusion: Void spaces are excluded from strata area, meaning developers can no longer charge buyers for empty air volume.
Comparison: Legacy vs. Current Rules
The primary goal of this policy was transparency, ensuring home buyers pay only for the floor space they can physically use. As we look back from 2026, the distinction between "legacy" (pre-2023) and "modern" (post-2023) condos is clear.
| Feature | Legacy Projects (Pre-June 2023) | Modern Projects (Current) |
|---|---|---|
| Air-Con Ledges | Excluded from GFA but included in Strata Area (Sold to buyers). | Included in GFA. Excluded from Strata Area if common property (Not sold to buyers). |
| Curtain Walls | Excluded from GFA but included in Strata Area. | Included in GFA and Strata Area. |
| Void Spaces | Excluded from GFA but often included in Strata Area. | Excluded from both GFA and Strata Area. |
| Measurement | Varied by agency. | Standardized to the middle of the wall. |
The End of "Phantom Space": Air-Con Ledges
This remains the most critical factor for buyers viewing projects launching soon. In the past, air-con ledges accounted for 4% to 5% of a unit's saleable area. Buyers paid full PSF price for this non-livable space.
Under current rules, developers maximize GFA efficiency by treating AC ledges as common property. This means the ledge is not sold to you. Consequently, the square footage listed in modern brochures reflects true internal livable space.
2026 Market Note: When comparing a resale condo (launched pre-2023) with a new launch, remember that a 900 sqft unit under the new rules is effectively larger than an older 900 sqft unit, as the older unit includes ~45 sqft of AC ledge in its total size.
Impact on Curtain Walls & Facades
Curtain walls (non-structural glass facades) were previously a "free" GFA bonus. Now that they count as GFA, developers have largely moved away from full-glass curtain wall systems except in the ultra-luxury segment. We have seen a consistent return to standard concrete walls with punched windows in mass-market executive condos to conserve precious GFA for internal layouts.
Elimination of Strata Void Spaces
High-ceiling units (lofts) previously included the "void" (empty air space) in the sales price. A 600 sqft unit might have been sold as 800 sqft (600 floor + 200 void). Today, strata void spaces are strictly non-saleable. Buyers pay only for the floor plate they can walk on.
Market Implications in 2026
For investors using our property investment guide, the pricing dynamics have settled into a new norm.
1. The "Higher PSF" Norm
Because "bloated" unsold space (AC ledges, voids) was removed from the total area, the Price Per Square Foot ($ PSF) mathematically increased when the policy first took effect. In 2026, this higher PSF is the standard baseline, reflecting the higher quality of usable square footage provided.
2. Optimized Efficiency
Developers have adapted by optimizing layouts to maintain affordability despite the loss of "free" GFA. New launches continue to prioritize functional layouts over the excessive balconies or bay windows seen in the 2010s.
Historical Case Study: Lentor Mansion
Lentor Mansion was a pioneer project under these GFA Harmonisation guidelines when it launched. Situated in the Lentor Hills estate, it set the precedent for the efficiency standards we see today:
- No Strata AC Ledges: Floor plans excluded AC ledges from the unit strata area.
- Efficient Layouts: The project maximized internal livable space.
- Competitive Quantum: It demonstrated that the market could adapt to the new definitions without pricing buyers out.
Most projects in our TOP in 2027 collection followed this exact template.
Frequently Asked Questions
Does GFA Harmonisation apply to older resale condos?
No. It only applies to development applications submitted on or after 1 June 2023. Existing properties retain their original strata definitions.
Are balconies still included in GFA?
Yes, balconies remain part of GFA and saleable strata area. However, the measurement is standardized to the middle of the parapet wall.
Why do new condos seem smaller on paper?
The square footage appears lower because non-livable spaces (like AC ledges) are no longer counted in the number. The actual livable space is often comparable to or better than older, "larger" units.
How does this affect Executive Condo purchases?
Current EC launches follow these rules strictly. This benefits mass-market buyers by ensuring every dollar spent goes toward usable space, which is critical for families managing tighter budgets.
- Policy Status: Fully implemented since 1 June 2023.
- AC Ledges: Treated as common property in modern condos; not sold to buyers.
- Strata Voids: No longer saleable; buyers pay only for floor area.
- Transparency: Brochure sizes now reflect true internal usage.
- Market Impact: The "phantom space" era is over, leading to more efficient layouts across the board.
