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In this guide
By Onah Attorneys Inc • Updated July 2026 • Legal information, not a substitute for advice on your specific matter.
The lapa, the cottage, the garage conversion — built years ago, no plans, no problem… until the sale, the insurance claim, or the neighbour’s complaint. Unapproved building work is a slow-burning liability with a known cure: as-built approval. Here are the risks, and the legalisation route.
What needs plans
Under the National Building Regulations: virtually all structures — additions, garages, cottages, structural internal changes, carports beyond minor exemptions. ‘Minor building work’ (small tool sheds, some pergolas) can be exempted BY the municipality on application — not by assumption. Boundary walls above certain heights, decks, and that ‘temporary’ wendy-with-plumbing all count. If it has a roof and a slab, assume plans.
The risks, ranked by pain
1) SALE collapse: bond valuers and buyers’ conveyancers ask for plans; unapproved structures kill bonds, trigger price chips, or return as post-sale misrepresentation claims (voetstoots does not protect fraud-level nondisclosure). 2) INSURANCE repudiation: the claim after the fire meets ‘unapproved structure’ exclusions. 3) COUNCIL enforcement: contravention notices, building-work stop orders, prosecution (fines), and s21 DEMOLITION applications for defiant cases. 4) The NEIGHBOUR who objects forever.
Legalising: the as-built application
The cure: appoint a SACAP-registered draughtsman/architect to draw AS-BUILT plans; an engineer certifies structural elements where required; submit for approval with the penalty/scrutiny fees municipalities charge for after-the-fact applications. Compliant structures get approved; non-compliant elements (building lines, coverage, height) need either physical remediation or a DEPARTURE/relaxation application — neighbours’ consents often required. Timeline: weeks to months by municipality; cost: modest against every risk above.
When the structure breaks the rules
Encroaching building lines or exceeding coverage: relaxation applications with motivation and neighbour consent; servitude conflicts (built over the sewer): services agreements or alteration; heritage overlays and estates: their own consent layers. True dead-ends (structurally unsound, irreconcilable with zoning) end in partial demolition orders — rare, and almost always preceded by years of ignorable letters that shouldn’t have been ignored.
Buying and selling with unapproved work
Sellers: legalise BEFORE listing — approved plans are a selling cost that recovers itself in an unchipped price. Buyers: demand approved plans as a suspensive/warranty term, verify at council yourself (plan printouts are cheap), and price the legalisation if you accept the risk. Agents’ ‘plans probably exist somewhere’ assurances are worth exactly the paper they’re not written on.
Frequently asked questions
Can the council really demolish my 15-year-old room?
Demolition orders are the last resort for irremediable/defiant cases — but the power exists and is used. Age doesn’t legalise a structure; approval does.
What does as-built approval cost?
Draughtsman + council fees + certificates typically run a few thousand to tens of thousands depending on scale — pub-quiz money next to a collapsed R2m sale.
The previous owner built it — my problem?
Yes, ownership carries the structure: enforcement targets the current owner. Your recourse against the seller depends on what was disclosed and warranted — check your OTP.
Do I need plans for a wendy house or container?
Above minor thresholds, or with services (plumbing/electrical), or used for habitation: yes in most municipalities. One call to town planning beats one contravention notice.
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