Undivided Share of Land in Bangalore Apartments: Calculation, FAR and Paper Checks

Every flat comes with a slice of ground that nobody can fence off, number or walk to. That slice is the UDS, the owner's undivided land share, and it appears in the sale deed of any apartment bought in Bangalore. Below is a plain account of how it is derived, what makes it large or small, and where a careful buyer should look.
Where the Number Comes From
Land is shared out in proportion to the size of each flat. A buyer divides the saleable area of the flat by the saleable area of the whole project, and applies that fraction to the land extent. Bigger flats receive more land, smaller ones less.
Picture a 3-acre site, which is 1,30,680 square feet. The flats in the project add up to 3,00,000 square feet, and one of them measures 1,800 square feet. Its fraction of the land works out to about 784 square feet, which is roughly 44% of the flat size.
Check one detail before trusting any such figure. Land given up to the town planning body for roads, gardens or amenity plots normally comes out first. The extent in the formula should match the net extent in the title papers, which can be lower than the brochure claims.
The Documents That Record It
The share is written down in more than one place, and a mismatch is a warning sign. Look at these four:
- The agreement for sale, stating the share as a percentage or in square feet
- The sale deed, in which the schedule lists the ground and fraction being conveyed
- The declaration under the Karnataka Apartment Ownership Act, 1972, which lists every flat's percentage interest in common areas
- The khata and property tax entries linked to the flat
Across a whole project, the fractions have to add up to all of the land. Buyers acting together can ask the builder for a complete statement and test this. When a flat is resold, the buyer receives exactly what the previous owner's deed recorded.
FAR and the Shrinking Slice
Floor area ratio is the construction allowed on a plot, expressed against the plot area. Allow more construction and the same ground is shared among more built space. Each flat then owns less land per square foot.
Using the same 3-acre site and the 1,800 square feet flat, three outcomes are possible. With 2,25,000 square feet built, the flat holds about 1,045 square feet of land, near 58%. With 3,00,000 built, about 784 square feet, near 44%. With 4,50,000 built, about 523 square feet, near 29%.
Zoning, the width of the road outside and the plot size decide the FAR. Buying premium FAR or transfer rights can lift it further. Tall towers on small plots by wide roads therefore carry thinner land shares than a few low blocks across a large campus.
Fewer Flats, More Land?
Fewer units in a project must mean a better share, or so it seems. In truth the built area alone fixes the percentage. The unit count only affects how that built area is cut into pieces.
Keep 3,00,000 square feet on the 3-acre site. If it is cut into 250 flats of 1,200 square feet, each owner holds about 523 square feet of land. If it is cut into 125 flats of 2,400 square feet, each holds about 1,045 square feet.
The percentage stays near 44% in both layouts. Roomier flats hold more ground in absolute terms, nothing more. For comparing projects, use the percentage, and use the square feet figure to see what one household owns.
Carpet Efficiency Changes the Reading
Efficiency describes how much of the saleable area is actually carpet area inside the walls. It leaves the owner's land untouched. It changes how large that land looks when set against the carpet area.
Take the 1,800 square feet flat with 784 square feet of land. If efficiency is 72%, carpet area is 1,296 square feet and the land reads as about 60% of it. If efficiency is 80%, carpet area is 1,440 square feet and the land reads as about 54%.
So the better-planned flat seems to score lower here, even though it gives more floor to live on. Compare like with like, using saleable area for every project or carpet area for every project.
Why It Counts Over the Years
Construction ages and loses worth, while ground under a growing city tends to hold or gain it. Owners hold their stake in that ground through the UDS. It matters most at certain moments:
- When an old building is demolished and rebuilt, and each owner's entitlement follows the land share
- When a highway or metro scheme takes part of the land, and compensation follows the share
- When an older flat is sold, and valuers weigh the land more heavily than the walls
- When a bank values the flat for a home loan
Even so, a good UDS cannot rescue a poor location or a weak floor plan. Treat it as one input among several.
A Short List Before You Sign
Settle these points in writing with the seller or the sales team:
- Request the UDS in square feet together with the method used
- Check the title deeds for the net plot area, and whether any piece went to the authority for roads, parks or amenity sites
- Turn the figure into a percentage of saleable area to compare projects fairly
- For a phased development, ask whether further towers will use the same land
- Look through the agreement for any right to use extra FAR or development rights down the line
- Confirm the figure matches across the agreement, sale deed and declaration
The law helps here. Under RERA, builders cannot change sanctioned plans without written consent from two-thirds or more of buyers. To have a quotation or the draft agreement checked, write to us.



