Residual land value calculator

The formula

GDV                  = saleable area × rate + other revenue
net realisation      = GDV − marketing
finance              = development cost × finance %
costs excluding land = development cost + finance

profit is p% of (land + costs excluding land), so:

land = (net realisation − costs excluding land × (1 + p)) ÷ (1 + p)

The land is the balancing figure. Everything else in the scheme is either contracted (cost), market-determined (revenue) or a policy you set (profit); the land absorbs the difference. That is precisely why residual land value is volatile and why it should be presented as a range with the drivers named.

Worked example

A one-acre site supports 81,120 sq ft of saleable area. At ₹6,500 per sq ft the gross development value is roughly ₹52.7 crore. Marketing at 4% takes ₹2.1 crore, leaving ₹50.6 crore of net realisation. Development cost excluding land is ₹26 crore, and finance at 8% of that adds ₹2.1 crore, so costs excluding land are ₹28.1 crore. At a 20% profit on total cost, the land can absorb about ₹14.4 crore — roughly ₹33,000 per sq ft of land.

Now drop the sales rate by 10%. Net realisation falls by about ₹5 crore, but because the costs and required profit are unchanged, almost that entire fall lands on the residual. The land value falls by more than a third. Grid, not point estimate.

What to work out next

• Joint development calculator

  Compare this residual against area-share and revenue-share JDA terms on the same base.

• Construction cost calculator

  Build the development cost figure this calculator asked you to enter.

• FSI / FAR calculator

  Derive the saleable area from plot area, FSI, coverage and efficiency.

• Developer feasibility

  How residual value sits inside a full viability appraisal and decision.

Frequently asked questions

What is residual land value?

It is what remains for the land once a scheme's net realisation has absorbed every cost of building and selling it and the profit the developer requires. It answers a different question from a comparable-sales valuation: not what similar land sold for, but what this scheme can afford to pay for this site.

Should profit be taken on cost or on value?

This calculator takes profit as a percentage of total cost including land, which is the more common Indian development convention and the more conservative of the two. Profit on GDV will produce a different — usually higher — residual for the same scheme, so never compare two appraisals without checking which basis each used.

Why is my residual land value negative?

Because at the rate, cost, finance and profit you entered, the scheme cannot pay anything for the land and still meet your profit requirement. A negative residual is a real answer, not an error: it usually means the sales rate assumption is optimistic, the cost is high for the product, or the profit requirement is above what the scheme supports.

How sensitive is the residual to the sales rate?

Extremely. Because land is the balancing figure, a small percentage change in revenue moves the residual by a much larger percentage. That gearing is why the sensitivity grid below matters more than the headline number, and why a single-point land value should never drive an acquisition decision.

Can I use this for a joint development instead of a purchase?

Use it first to establish what the site supports, then compare structures. The joint development calculator applies the same cost and revenue base to area-share and revenue-share terms so the implied land cost of each is directly comparable with this residual.