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How to work out your buildings insurance replacement value

Written by Chloe Adams Managing Editor Reviewed by Nomsa Dlamini RE5 qualified · 12 years in short-term insurance Updated 26 July 2026 Our editorial standards →

What is the replacement value for buildings insurance?

The replacement value for buildings insurance is what it would cost to rebuild your home from scratch today - including demolition, rubble removal and professional fees. It is not the market value or the municipal value, both of which include the land. Insuring for the correct rebuild value is essential: if you insure for too little, most insurers apply 'average' and reduce your payout in proportion to how much you under-insured.

Key takeaways

Replacement (rebuild) value is the cost to rebuild your home, not its market or municipal value.
Market value includes the land; rebuild value does not - they are usually very different numbers.
Include demolition, rubble removal and professional fees in your sum insured.
Under-insuring triggers 'average', cutting your payout at claim time.
Review your rebuild value every year, as building costs rise with inflation.

Rebuild value vs market value

These are three different numbers, and only one is right for buildings insurance:

Market value - what your property would sell for, including the land and location. Not used for buildings cover.
Municipal value - the value your municipality uses for rates. Also not the right figure.
Replacement (rebuild) value - the cost to rebuild the structure from scratch. This is what you insure for.

In sought-after areas the market value can be far higher than the rebuild value; in others the rebuild value can be higher. Never assume they are the same.

What to include in your rebuild value

Your buildings sum insured should cover the full cost to rebuild, including:

The main dwelling and all permanent structures - garages, outbuildings, walls, gates and paving.
Fixed items such as geysers, fitted kitchens and built-in cupboards.
Demolition and rubble removal after a total loss.
Professional fees - architects, engineers and quantity surveyors.
Swimming pools, boreholes and other fixed improvements.

How to estimate your rebuild value

There are two common approaches:

Rate per square metre - multiply your home's floor area by a rebuild rate per m². Rates vary widely with finishes and location, so treat any figure as an estimate.
Professional valuation - a quantity surveyor gives the most accurate figure, worth it for higher-value or non-standard homes.

Get a quick starting estimate with our buildings rebuild-cost calculator, then confirm the figure with your insurer or a professional.

Frequently asked questions

Should I insure my home for market value or rebuild value?

Rebuild value. Market value includes the land and reflects location and demand, which are irrelevant to the cost of rebuilding the structure. Insuring for market value usually means over- or under-insuring - always use the rebuild (replacement) cost.

What happens if I under-insure my buildings?

If your sum insured is less than the full rebuild value, most South African insurers apply 'average' at claim time and reduce your payout in the same proportion. Insure for the full rebuild value and review it yearly to be paid in full.

How often should I update my rebuild value?

At least once a year. Building material and labour costs rise with inflation, so a figure that was correct a few years ago is likely too low today. Many insurers apply an annual escalation, but you should still check it matches reality.

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