Buyers routinely assume a 1,250 sq ft plot means 1,250 sq ft of house. It does not. Building by-laws determine how much of your land you may cover, how high you may go and how far from your boundaries you must stay — and they are the difference between the house you imagined and the house you are permitted to build.
The four rules that shape every house
1. Setbacks. The mandatory open space between your building and your plot boundaries. A front setback is almost universal (it becomes your lawn and car porch). Rear and side setbacks depend on the society and the plot size — larger plots typically require more.
2. Covered-area ratio. The proportion of your plot you may build on, usually expressed as a percentage of plot area per floor. This is the rule that converts plot size into floor space.
3. Height and storeys. How many floors you may build, and the maximum height. Residential plots in most societies permit ground plus one or two, with roof structures treated separately.
4. Mumty and roof structures. The stair enclosure (mumty), water tanks, laundry and any servant quarter on the roof are usually governed by their own limits, and often counted differently from main floors.
Why we are not quoting you numbers
You will find articles stating exact setback distances and coverage percentages as though they were universal. They are not. These rules vary by society, by plot size and by block, and they change over time. A number that was right for one scheme three years ago can be wrong for yours today.
Get the current by-laws in writing from your own society's building control office before your architect begins. This is a single visit or phone call, and it is the cheapest step in the entire project. Designing to the wrong rules means paying for drawings twice, or worse — discovering the problem at map approval after you have fallen in love with a plan.
Working out your buildable footprint
Once you have the actual rules, the arithmetic is simple: take your plot dimensions, subtract the required setbacks from each relevant side, and you have your maximum ground-floor footprint. Multiply by permitted floors for total covered area.
As a worked illustration on Faisal Town Phase 2's standard dimensions, and using planning assumptions rather than stated by-laws:
- 5 Marla (25×50 ft, 1,250 sq ft plot) — commonly lands around 850–1,000 sq ft per floor
- 10 Marla (35×70 ft, 2,450 sq ft) — commonly around 1,700–2,000 sq ft per floor
- 1 Kanal (50×90 ft, 4,500 sq ft) — commonly around 2,800–3,200 sq ft per floor
These are the ranges that typically result, not entitlements. Your approved drawings are the only authority. The design implications of each are in our guides to 5 Marla, 10 Marla and 1 Kanal houses.
Why covered area matters so much to your budget
Because construction is priced per square foot of covered area, not per Marla of plot. Covered area is the number that drives your build cost, and a design that uses its permitted area efficiently costs the same per square foot as one that wastes it in corridors — which is why paying an architect properly is the highest-return decision in the project (where costs genuinely flex).
Other restrictions worth asking about
- Basements — permitted or not, and under what conditions. Also check the local water table independently; a basement in high-water-table ground is a permanent damp problem.
- Elevation controls. Some societies, particularly in showcase blocks, impose façade or material requirements.
- Boundary wall height, and rules on front walls and gates.
- Corner plots, which often carry different setback requirements on the second street frontage — relevant if you paid a category premium for one.
- Commercial use, which is governed by zoning, not by your preference. Never assume a residential plot can be converted.
- Timeframes — some societies require construction to begin or complete within a defined period of possession.
The sequence that avoids expensive mistakes
1. Confirm possession and that the plot is genuinely buildable (possession sequence)
2. Obtain the current by-laws in writing from the society
3. Brief your architect against those rules
4. Submit for map approval
5. Only then commit to a construction contract (hiring well)
Building in Faisal Town Phase 2 and unsure what applies to your block? Ask our team — we will point you to the right office, and note that the society's NOC remains under process.
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