What is ground coverage?

The proportion of the plot occupied by the building footprint at ground level, expressed as a percentage of plot area. It is regulated separately from FSI and constrains the plan shape rather than the total floor area.

How many floors does my coverage and FSI imply?

Divide FSI by the coverage expressed as a decimal. FSI 2.0 at 40% coverage implies five floors of full footprint. Real schemes need more floors than that because upper floors are rarely the full permitted footprint.

Does basement area count towards coverage?

In most Indian development control regulations basements used for parking and services are excluded from ground coverage and often from FSI, but the treatment differs by authority and by whether the basement projects beyond the building line. Confirm locally.

Is ground coverage the same as FSI?

No. Ground coverage limits how much of the plot the building may sit on; FSI limits the total floor area across all floors. A site can be constrained by either. Coverage plus a height cap frequently prevents a scheme from using its full permissible FSI, and that collision is worth testing before design work starts.

Ground coverage calculator — footprint, open space and plot efficiency

Work forwards from a permitted coverage percentage to the footprint you may build, or backwards from a measured footprint to the coverage you are consuming.

Site

Plot areayou enter

Plot area unityou enter

Basis

I knowyou enter

Permitted ground coverageyou enter

Confirm with the sanctioning authority. DevPartner supplies no planning figure for any city.

Result — calculated from your inputs

Building footprint8,000 sq ft

Ground coverage40%

Open space left12,000 sq ft

Plot breakdown

Plot area20,000 sq ft

Covered8,000 sq ft

Open12,000 sq ft

Open space share60%

Continue to a full site assessment

A calculator answers one question. A DevPartner assessment carries planning capacity, programme, cost, revenue, deal structure and cash flow through one deterministic model and freezes a versioned decision report.

Carried across: Site extent (20000 sqft). Nothing else from this page is transferred, and no opportunity is created until you save one.

Continue to a full site assessment See a sample decision report

How this calculator works

footprint = plot area × coverage %        (forward)
coverage %= footprint ÷ plot area × 100    (reverse)
open space= plot area − footprint

You enter: A value you supply. Nothing is assumed for you.
Calculated: Arithmetic on your inputs, shown in the working.
Assumption: A factor or allowance you can change — mix ratios, wastage, dry-volume factors.
Approximation: Geometry or method that approximates reality; labelled wherever used.
Verify locally: Planning parameters, statutory rates and structural design must come from the authority or a qualified professional.

Coverage decides the shape of the scheme

Ground coverage sets how much of the plot the building may occupy at ground level. Together with FSI it determines the number of floors implied: an FSI of 2.0 at forty percent coverage implies five efficient floors, while the same FSI at twenty percent coverage implies ten. That choice drives structure, lifts, fire strategy and cost per square foot long before it drives design.

Coverage is separately regulated from setbacks. Meeting the coverage limit does not mean the footprint fits: setbacks, fire tender paths and internal driveways may make the compliant footprint unbuildable in the shape you want.

Open space is not spare land

The residual open area carries driveways, parking, service yards, transformer and generator space, water tanks, fire hydrant rings, landscaping and any mandated recreational open space. Treating it as available for later expansion is a common planning error that surfaces during sanction.

Where a project has podium or basement parking, footprint at ground level and footprint below ground differ, and the coverage rule usually applies only to the above-ground envelope. Confirm which surfaces count in your jurisdiction.

Worked example

On a 10,000 sq ft plot with 40% permissible coverage, the maximum footprint is 4,000 sq ft. To reach 20,000 sq ft of built-up area at that footprint you need five full floors. If the height regime only permits four, either the footprint has to grow — which coverage forbids — or the scheme cannot use its full intensity.

That collision between coverage, height and FSI is where most first-pass schemes actually fail.

Mistakes with coverage

Confusing coverage with FSI. Coverage limits the area of ground the building sits on; FSI limits the total floor area across all floors.

Forgetting that the coverage envelope is further reduced by mandatory setbacks, so the achievable footprint is normally smaller than the coverage maximum.

Counting projections, ramps, basements and podia inconsistently, when the local rules define precisely which of them are within coverage.

Limits of this calculator

The coverage percentage is your input, verified against the applicable regulations. Nothing here checks setbacks, open space requirements, fire tender access, or whether a plot's shape lets you use the theoretical footprint at all.

Use it to test whether a massing idea is even geometrically plausible before you pay for a design.

Frequently asked questions

What is ground coverage?: The proportion of the plot occupied by the building footprint at ground level, expressed as a percentage of plot area. It is regulated separately from FSI and constrains the plan shape rather than the total floor area.
How many floors does my coverage and FSI imply?: Divide FSI by the coverage expressed as a decimal. FSI 2.0 at 40% coverage implies five floors of full footprint. Real schemes need more floors than that because upper floors are rarely the full permitted footprint.
Does basement area count towards coverage?: In most Indian development control regulations basements used for parking and services are excluded from ground coverage and often from FSI, but the treatment differs by authority and by whether the basement projects beyond the building line. Confirm locally.
Is ground coverage the same as FSI?: No. Ground coverage limits how much of the plot the building may sit on; FSI limits the total floor area across all floors. A site can be constrained by either. Coverage plus a height cap frequently prevents a scheme from using its full permissible FSI, and that collision is worth testing before design work starts.