You've got the right idea! Let's analyze your questions about plot ratio and gross floor area (GFA):
**a. Building Options:**
Yes, with a land area of 3,000 sqft and a plot ratio (PR) of 1.4, the maximum GFA is indeed 4,200 sqft (3,000 sqft * 1.4). Here's how your options would work:
* **2 Storey of 2,100 sqft each:** This is a viable option as long as it adheres to building height regulations. The total GFA (2,100 sqft/floor * 2 floors) would be 4,200 sqft, perfectly utilizing the allowed limit.
* **5 Storey of 840 sqft each (subject to height limit):** This could also work, but each floor area would be smaller (840 sqft/floor * 5 floors = 4,200 sqft). Remember, there might be height restrictions that limit the number of floors you can build.
**b. Basement and GFA:**
In Singapore, basements that protrude more than 1.0 meter above ground level on any side **are counted** towards the GFA. This means they contribute to the total usable floor area.
So, in your example:
* **2 storey of 2,100 sqft each with a 1,000 sqft basement:**
* **Total GFA without basement:** 2,100 sqft/floor * 2 floors = 4,200 sqft (which is the maximum allowed)
* **However, with a basement exceeding 1m above ground:** If the basement area is more than 1 meter above ground on any side, it would be counted as part of the GFA. Adding the basement (1,000 sqft) would exceed the 4,200 sqft limit (4,200 sqft + 1,000 sqft = 5,200 sqft). This wouldn't comply with the plot ratio restriction.
**Key Points:**
* Plot ratio (PR) determines the maximum GFA allowed on a specific land area.
* Always consider building height limitations when planning the number of floors.
* Basements exceeding 1 meter above ground level are included in the GFA calculation.
By understanding these factors, you can make informed decisions about building development within plot ratio limitations.
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