Property risk report: checking the environmental risk of a property before you buy

A home inspection tells you about the building. It does not tell you that the erf lies partly inside a floodline, that the ground beneath it is dolomitic, that a sewer servitude runs under the lawn, or that the vacant land behind the back wall is zoned for a four-storey block.

Those are the risks a property risk report exists to surface: the ones that belong to the land and its surroundings, not to the bricks.

What "property risk" covers

For a buyer, risk falls into four groups.

1. Environmental risk — natural and physical hazards affecting the site.
2. Planning risk — what the rules allow on the property and around it.
3. Legal risk — what is registered against the title.
4. Compliance risk — whether what has been built is lawful.

A good report addresses the first three from records. The fourth needs documents from the seller.

Environmental risk property checks

Flooding

Properties near streams and spruits may lie within a floodline. This affects safety, insurance, what may be built and resale. See floodline map and floodline check.

Dolomite

Dolomitic ground can give rise to sinkholes and subsidence, and brings requirements for investigation and precautionary measures. See dolomite area map and dolomite risk.

Soil conditions

Expansive clay, collapsible soil and fill all affect foundations. The symptom in an existing house is cracking; the consequence for a new build is cost.

Wetlands and watercourses

Beyond flood risk, wetlands and watercourses are protected. Work in or near them may need environmental authorisation, and buffers can remove land from use. See floodlines and wetlands.

Undermining and past land use

Along Johannesburg's old mining belt, shallow undermining and mine residue are considerations for some areas. Former industrial sites and filling stations can leave contamination.

Slope and erosion

Steep sites cost more to build on and need attention to stormwater and retaining structures.

Surrounding uses

Power lines, major roads, railway lines, industry and landfill sites affect amenity, and sometimes health and value.

Planning risk

The zoning of the erf. Is the current use lawful? Does the zoning allow what you intend? See zoning check.

The zoning of neighbouring land. What could be built next door or behind? See Johannesburg zoning map explained.

Planning policy. Is the street earmarked for higher density or mixed use? That may be an opportunity or a threat, depending on why you are buying. See densification in Johannesburg.

Road proposals. Planned road widening or new routes can take land or change a street's character.

Legal risk

Title conditions that restrict use or building. Servitudes that give others rights over the land. Both are covered in title deed search and title conditions.

Boundaries. Encroachments in either direction. See check a property boundary.

Compliance risk

Unapproved structures. Buildings and additions without approved plans. See unapproved structures: what a buyer inherits.

Municipal arrears. See municipal account arrears.

Certificates — electrical, gas, electric fence and others required on transfer.

What a property risk report shows

A report should place each risk on the specific erf, not describe the suburb in general terms.

For a Johannesburg property, the report on checkproperty.co.za covers:

• site constraints — floodlines, dolomite and soil;
• zoning, with density, height and parking zones, building lines and the planning framework guideline, in the Development potential report;
• title deed reference, servitudes and the survey diagram, also in the Development potential report;
• the erf boundary on a map, with aerial imagery from different years;
• sales history, comparable sales and suburb statistics, for the price context.

It is compiled from public sources and shows the date the data was retrieved. Report contents are set out on the pricing page.

How to read a risk report

Start with location on the erf. A floodline in the bottom corner of a large garden is manageable. The same line through the house is not.

Look for combinations. A servitude plus a floodline plus building lines may leave very little usable land.

Separate deal-breakers from price adjustments. Some risks mean walk away. Most mean investigate and price in.

Follow each flag to its specialist.

Flag	Who to ask
Floodline	Civil engineer
Dolomite or poor soil	Geotechnical engineer
Zoning or planning	Town planner
Title conditions and servitudes	Conveyancer
Boundary	Land surveyor
Structural cracks	Structural engineer
Unapproved building	Architect or draughtsperson

A risk report tells you which of these calls to make. It does not replace them.

What no desktop report can tell you

Be clear about the limits.

• Condition of the buildings — roof, damp, wiring, plumbing.
• Hazard on the specific site — a map shows dolomite is present, not the hazard class.
• Anything not yet in public records — a pending rezoning application nearby, for example.
• Neighbourhood realities — noise, crime, how the street floods in a storm.

Visit the property more than once, at different times, and talk to neighbours.

Using risk findings in an offer

• Make the offer conditional on satisfactory specialist reports where a risk is flagged.
• Ask for documents — approved plans, a dolomite stability report, a flood certificate, the title deed.
• Adjust the price for quantified risks.
• Get insurance and finance confirmed before the offer becomes binding.
• Walk away when the risk cannot be quantified and the seller will not allow time to investigate.

Risk for investors and developers

For an investor, risk translates into cost and vacancy. For a developer, into yield and programme. Either way, the earlier a risk is found, the cheaper it is. Finding a floodline after transfer is expensive; finding it before the offer costs a few minutes. See development feasibility.

Frequently asked questions

Is a property risk report the same as a home inspection? No. An inspection covers the building's condition. A risk report covers the land, its surroundings and the rules attached to it. You need both.

Does a clean report mean no risk? It means none of the mapped risks affect the erf. It does not cover what is not in the records.

Can I get one before making an offer? Yes — that is the point.

The bottom line

Environmental, planning and legal risks belong to the land and stay with it. Check them for the specific erf before you offer, follow each flag to the right specialist, and let what you find shape the price and conditions.

Run a risk check on a property.

This is general information, not legal, engineering or environmental advice. Property reports are indicative and compiled from public sources.