By Siddaganga Real Estate9 min read

In Mysuru, plots are usually described by two numbers: a 30×40 site, a 40×60 site. Those numbers are the plot's width and depth in feet, and they are the first thing most buyers ask about. But the size on paper is only the start. How much house you can actually build depends on building rules that leave part of every plot open, on the plot's shape, and on the width of the road in front of it. This guide explains the common site sizes, what each works out to in square feet, the kind of home each tends to suit, and the other factors that decide what a site is really worth to you. It does not state the building rules themselves, which vary and change; for any specific plot, confirm them with the authority that will approve your building plan.
How site sizes are described
A site described as 30×40 measures 30 feet by 40 feet. The first figure is usually the width along the road and the second the depth, but check the sketch rather than assuming, because which side faces the road changes the design. Multiply the two and you have the area: 30×40 is 1,200 sq ft.
Documents do not always use feet. Sale deeds, khata records and layout plans in Karnataka often give measurements in metres, or in both units, and one square metre is about 10.76 square feet. Some layouts are planned in round metric sizes, so a site marketed as "30×40" may actually measure 9 by 12 metres, which works out a little under 1,200 sq ft. The difference is small on a single site, but it matters when a price is quoted per square foot, so always go by the measurements in the deed and the approved layout plan.
The sale deed describes the property in a part called the schedule, which gives the measurement of each side and what lies on each boundary — east, west, north and south. Read it, and when you visit, measure the plot yourself; our site visit checklist explains how to check that the ground matches the paper.
30×40 and 30×50: the everyday family site
A 30×40 site, at 1,200 sq ft, is the size many Mysuru buyers picture when they think of a plot. It comfortably takes a compact independent house, and many families build on more than one floor to get the space they need — a home on the ground floor with a separate unit above, for example, where the rules allow. Parking for a car is usually possible, but garden space is limited, and rooms need careful planning to feel generous.
A 30×50 site, at 1,500 sq ft, has the same frontage but more depth. That extra depth often goes into a larger living area, an extra room, a small open space at the back or more comfortable parking at the front. Because the width is unchanged, the house still runs front to back, so getting light and air into the middle of it needs thought.
Both sizes suit first-time buyers and smaller families, and both are easier on the budget than larger sites, to buy and to build on. The trade-off is space: if you want a large garden, room for several cars or a joint family under one roof, a bigger site may serve you better.
40×60 and 50×80: room to spread out
A 40×60 site, at 2,400 sq ft, has twice the area of a 30×40. The wider frontage changes what is possible: a car porch beside the entrance, a garden at the front or side, larger bedrooms, and room for a home designed around a joint family or with a separate unit for parents or tenants. For many families, it is the point where an independent house starts to feel spacious rather than merely efficient.
A 50×80 site, at 4,000 sq ft, is a large plot by city standards. It suits a bungalow-style home with a generous garden, parking for several vehicles, or a design with open space on all sides of the house.
Bigger plots carry bigger commitments. The land costs more, the house you build on it will usually cost more, and the compound wall, garden and upkeep all grow with it. If you are drawn to a large site, make sure your budget covers not only buying it but building and maintaining it. Our guide to house construction costs helps you plan that side.
Plot size is not house size: setbacks and floor-area rules
No site lets you build on every square foot. Building rules decide two things that together set the limit on your house:
- Setbacks are the open margins you must leave between the building and each boundary — front, back and sides. They exist for light, air, access and safety, and they generally vary with the size of the plot and, under many rules, the width of the road.
- Floor-area rules, often expressed as a floor area ratio (FAR) or floor space index (FSI), cap the total built-up area across all floors as a proportion of the plot's area. Rules on height and the number of floors add further limits.
Put simply, setbacks decide the footprint on the ground, and floor-area rules decide how much you can build in total. Two plots of the same size can have different allowances if they face roads of different widths or fall under different regulations.
We deliberately do not quote the figures: they depend on the approving authority, the zoning of the area and the regulations in force, which can change. Before you buy, ask that authority, or an architect who regularly submits plans there, what this particular plot allows. Our guide to building plan approval explains how the sanction process works.
Odd-shaped plots
Not every site is a neat rectangle. Some are wider at the back than the front, some are cut at an angle where a road bends, and some are L-shaped or triangular. For these, a label like "30×40" can mislead, because the four sides may all be different lengths.
With an odd-shaped plot, rely on the measurement of every side and the area as stated in the deed schedule and the layout plan, not on a rounded description. If the shape is complicated, have a licensed surveyor measure it and work out the area.
Shape affects design more than most buyers expect. Setbacks apply along every boundary, so an irregular plot can lose proportionally more of its area to open margins, and awkward corners are hard to use for rooms. A good architect can often turn an irregular site into an interesting home, but it takes more design effort, and the house may end up smaller than the plot's area suggests.
Irregular plots are sometimes priced lower for these reasons, which can make them good value with the right design. Either way, ask an architect to sketch what can realistically be built before you agree a price.
Why road width matters as much as plot size
The road in front of a site shapes both daily life and the building itself. A wider road brings easier access for cars and construction lorries, room for visitors to park, and more light and air at the front of the house, though usually more traffic too.
Road width can also affect what you are allowed to build. Building rules commonly link the permitted height, number of floors or floor-area allowance to the width of the road a plot faces, so a site on a narrow road may allow less than an identical one on a wider road. Ask the approving authority how this applies to the plot you are considering.
Check the width in two places: on the approved layout plan, and on the ground with a tape. They should match. If the road on the ground is narrower than the plan shows, find out why — an encroachment, an unfinished road or a plan that has changed. Ask, too, whether any road widening is proposed, as it could take a strip from the front of the plot.
For a corner site, both roads matter; our guide to corner plots covers the pros and cons in detail.
Choosing the right size for your plans
Start with the home you want rather than the site. Think about how many bedrooms you need now and in the years ahead, whether parents will live with you, whether you want a rental unit, how many vehicles you have, and how much garden you will really look after. An architect can tell you which plot sizes, under the local rules, can accommodate that — and which cannot.
Then weigh the budget honestly. A larger site costs more to buy, more to build on and more to maintain, and a well-designed home on a modest site often serves a family better than a stretched budget on a large one. Remember, too, that the checks that protect you — approval, title, the Encumbrance Certificate, khata, and a site that matches its paperwork — matter far more than the size.
If you would like to compare sizes and locations, you can browse current plots in Mysuru. Siddaganga Real Estate has helped families choose plots in the city for over twelve years, and you are welcome to visit the JP Nagar office to talk through what would suit your plans.
Frequently asked questions
- How many square feet is a 30×40 site?
- A 30×40 site is 1,200 square feet: 30 feet multiplied by 40 feet. In the same way, a 30×50 site is 1,500 sq ft, a 40×60 site is 2,400 sq ft and a 50×80 site is 4,000 sq ft. Check the exact measurements in the sale deed and the approved layout plan, though, because some layouts use metric dimensions that work out slightly differently.
- How big a house can I build on a 30×40 site?
- It depends on the building rules for that plot, not just its area. Setbacks decide how much of the ground the house can cover, and floor-area and height rules decide the total built-up area across floors; both can vary with plot size, road width and the approving authority. Ask the authority that will sanction your plan, or an architect who works with it, what that specific site allows.
- Which site size is best for a family home in Mysuru?
- There is no single best size. A 30×40 or 30×50 site suits many smaller families and first-time buyers, especially if you build on more than one floor. A 40×60 site gives room for a larger home, a garden or a joint family, and a 50×80 site suits a bungalow with grounds. Choose on the home you need and the budget to build and maintain it.
- Are odd-shaped plots a bad buy?
- Not necessarily. Irregular plots can lose more area to setbacks and need more careful design, and some families avoid them for Vastu reasons, so they are sometimes priced lower. With a good architect, an odd-shaped plot can become a comfortable and distinctive home. Before agreeing a price, check the measurement of every side and ask an architect to sketch what can realistically be built.
- Why do property documents show plot sizes in square metres?
- Official records in Karnataka often use metric units, while buyers and sellers usually talk in feet. One square metre is about 10.76 square feet, so the same plot can be described both ways. Compare like with like, and if a price is quoted per square foot, make sure it is applied to the area stated in the deed rather than to a rounded description.
This guide is general information, not legal, tax or financial advice. Rules, rates and procedures change — confirm the current position with a property lawyer, chartered accountant or the relevant authority before you act.


