Redevelopment Share Calculator

Work out redevelopment share instantly with clear inputs, formula shown and shareable results.

About Redevelopment Share Calculator

In a redevelopment offer the existing occupier receives their current carpet area plus an additional percentage, together with a corpus payment for hardship and future maintenance. Valuing the new flat at post-redevelopment rates and adding the corpus gives the total benefit, which is what should be compared against competing developer offers.

Formulas

New area

New carpet = existing carpet x (1 + additional percentage)

Total benefit

Benefit = new carpet x post-redevelopment rate + corpus

Worked example

With the default values below, Redevelopment Share Calculator returns Total value of the offer of $7,350,000.00. Change any input above and every figure here is recalculated in your browser.

Inputs used

Existing carpet areaminimum 0.1 ft²: 500 ft²
Additional area offeredaccepts 0–100 %: 30 %
Market rate after redevelopmentminimum 0 per ft²: 9,000 per ft²
Corpus and hardship paymentminimum 0: 1,500,000

Results

Total value of the offer: $7,350,000.00
New carpet area: 650.0 ft²
Additional area gained: 150.0 ft²
Value of the new flat: $5,850,000.00

Step by step

1Values used
2New area
3Total benefit
4Total value of the offer= 7,350,000.00
5New carpet area= 650.0 ft²
6Additional area gained= 150.0 ft²
7Value of the new flat= 5,850,000.00

Assumptions and limits

The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

How is the Redevelopment Share figure worked out?

New carpet = existing carpet x (1 + additional percentage). In a redevelopment offer the existing occupier receives their current carpet area plus an additional percentage, together with a corpus payment for hardship and future maintenance.

Should rent during construction be counted?

Yes. Displacement rent for the construction period is a separate and significant element of the package, and offers should be compared on the full bundle rather than the area percentage alone.

What values do I need to enter?

This calculator takes 4 inputs: Existing carpet area, Additional area offered, Market rate after redevelopment, Corpus and hardship payment. The pre-filled defaults are a realistic worked example — replace them with your own site or project figures.