How to compare two property price-list versions

Prepared by the NovAsia Editorial Team

> Important. This material is educational and is not legal, tax or financial advice. Rules, rates, deadlines and terms change and depend on your situation and the specific property — verify the current details with a qualified professional (a lawyer or tax advisor) before any decision or payment.

First confirm that the items are comparable

A newer sheet with a higher average does not prove prices increased. Lower-priced units may have sold out; area, floor, view, specification, discount or payment plan may differ. History starts with a comparable pair, not a chart line.

1. Preserve each version

Record:

• project and document name;
• effective date and received date;
• source and evidence state;
• currency and tax/fee basis;
• release/phase;
• whether availability is complete or partial.

Do not infer an effective date from the download timestamp.

2. Normalise unit fields

Compare only when matched or explicitly normalised:

• unit ID or comparable type;
• gross/net area and method;
• floor/band, orientation and view;
• furniture/fit-out/parking;
• full/list/discounted/effective price;
• payment plan and handover timing.

A material field difference should prevent automatic admission to one series.

3. Separate price types

• developer full/list price;
• developer discounted price;
• broker asking;
• resale asking;
• effective price after defined adjustments;
• achieved transaction price.

Do not connect them in one line. The current research did not verify a public Cambodia-wide achieved condo-price database.

4. Calculate only for a comparable pair

absolute_change = new_price − old_price

percentage_change = (new_price − old_price) / old_price × 100

Show both prices, dates, currency, type and changed terms. Do not calculate a percentage when the old price is missing or zero, or when the price type differs.

5. Explain catalogue mix

Even if the median or average of available units changes, show the item count and whether the composition is the same. A mix change is not a price change for a specific unit.

6. Review incentives and payment plan

Discounts, furniture, GRR, buyback and instalments affect economics but are not automatically cash-equivalent. Keep separate:

• headline/list price;
• cash discount;
• required packages;
• payment timing;
• programme terms and obligated party;
• effective-price assumptions.

When a chart is allowed

At least two comparable dated points are required for one series. One baseline is not history. Two layouts are not a trend. Asking price is not achieved sale price.

Checklist

• Both versions are preserved and dated.
• Unit/area/floor/specification match.
• Price type matches.
• Payment plan and incentives are comparable.
• Currency and fee/tax basis match.
• The change is not only availability mix.
• Source and evidence state are shown.

Related: how to read a brochure and price list, effective net price, compare projects.

Frequently asked

Does a higher average price in the new price list prove that prices went up?

No. A new table with a higher average does not prove a market increase. Cheaper units may simply have sold out, and the size, floor, view, specification, discount or payment plan may have changed with them. Even when the median or average of available units changes, you should show the item count in each version and whether the composition is the same. A mix change is not a price change for a specific unit. The story starts with a comparable pair, not with a chart line.

Which unit fields have to match before two prices can be compared?

Compare only where the fields match or are explicitly normalised: unit ID or a comparable type, gross and net area with the stated method, floor or floor band, orientation and view, furniture, fit-out and parking, price type, payment plan and handover timing. If one field differs materially, that pair should not automatically become a point in the same series. Check separately that currency and the tax or fee basis are identical, and that the source and evidence state of both versions are shown.

When is a price-trend chart acceptable at all?

At least two comparable dated points are required for one series. One baseline is not history, two layouts are not a trend, and asking price is not achieved sale price. Price types must stay separate rather than being joined by a single line: developer full or list price, developer discounted price, broker asking, resale asking, effective price and achieved transaction price. Do not calculate a percentage when the old price is missing or zero, or when the price type differs. A file without a date does not inherit one from its download time.