# Keeping a land bank true

URL: https://businessbuildermap.com/blog/keep-land-bank-current/
Published: 2026-10-19
Author: Business Builder Map team

An out-of-date land bank does more damage than no land bank. An investor who finds one "available" plot that was sold last spring stops trusting the rest. Here is a light routine that keeps the data honest.

## Why land banks go stale

The first version of a land bank is usually great. Somebody spent 3 months on it. Then that person moves to another project, sales happen, a substation gets delayed, and the file stays as it was.

The usual cause is that no one owns the change.

## Give every field an owner

Split the plot record by who knows each fact first:

- Status and price: the land or sales team, because they sign the deals.
- Power and water capacity: whoever talks to the utilities.
- Zoning and permitted uses: planning.
- Incentives: the policy or investor services team.
- Boundaries and geometry: the GIS or survey team, who change them rarely.

Each owner updates only their fields. No one has to understand the whole record, and the GIS team stops being a bottleneck for a price change.

## Put a date on every number that moves

Capacity, price and status all change. Show when each was last confirmed, right next to it. "Available, checked 3 October" reads very differently from a bare "available".

Dates also make your own audit easy. Sort by the oldest check date and you know where to look first.

## Keep one master copy

Plot data tends to multiply: a spreadsheet for sales, a GIS layer for planning, a PDF brochure, the website. Four copies means four slightly different truths within a month.

Pick one master. Everything else should read from it, or be generated from it. When someone asks "which number is right?", the answer should take no thought at all.

## When a plot changes shape

Plots get split for a smaller investor or merged for a bigger one. Keep the old IDs in the record and point them to the new ones. Old emails, reports and links will keep working, and you can still trace the history of a piece of land years later.

## Let the deal update the map

The best moment to change a plot's status is the moment the deal changes. If a reservation, an allocation or a cancellation happens inside the same system that shows the map, the status changes by itself.

That is how online plot booking works in a Business Builder Map deployment: when a plot is booked, it shows as reserved to every other investor straight away, and no one has to remember to edit a spreadsheet.

## A 30-minute monthly sweep

1. Filter all plots whose status was last checked more than 60 days ago.
2. Send each owner the list of their fields that need a look.
3. Compare "reserved" plots with open deals. Release the ones with no deal behind them.
4. Check that every new tender or auction is linked to its plots.
5. Note what changed in a short log. It becomes your monthly report.

## Small, regular, boring

None of this needs a big data project. It needs a named owner per field and a habit. Done for a year, it gives you something many zones don't have: a land bank investors believe.

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