Structural Repairs South Africa: cracked walls, sinking floors, leaning retaining walls and spalling concrete all need the cause found before anything is fixed. Describe the problem once and compare quotes from independent structural repair specialists.
- Send wide and close-up photos of the damage.
- Say when it started and whether it is getting worse.
Describe the job once and compare quotes from independent specialists.
Compare Structural Repair QuotesSigns That Need an Assessment
- Stepped or diagonal cracks through brickwork, often wider at one end.
- Doors and windows that start sticking or no longer close.
- Sloping floors or cracks across a floor slab.
- Gaps opening at skirtings, cornices or between walls.
- Retaining or boundary walls that lean, bulge or crack.
- Rust stains or concrete breaking off beams, columns or balconies.
- Damp at the base of walls that gets worse after rain.
Safety first. If cracks are opening quickly, doors or windows suddenly jam, or a wall, beam, balcony or retaining wall looks unstable, keep people and cars away and get a professional assessment promptly. Do not attempt structural repairs yourself.
What Structural Repairs Cover
| Problem | Service |
|---|---|
| Settlement, sinking or subsidence | Foundation repairs, underpinning or piling |
| Cracked walls | Wall crack repairs and crack stitching |
| Damaged slabs, beams, columns and balconies | Concrete repairs |
| Flaking concrete and exposed steel | Concrete spalling repairs |
| Leaning or bulging walls holding back soil | Retaining wall repairs |
| Water soaking the ground around the building | Subsoil drainage |
| Damp in below-ground walls | Foundation waterproofing |
| Failed movement joints | Expansion joint repairs |
| Unknown ground conditions | Geotechnical investigations |
Find the Cause First
Common causes are expansive clay that swells and shrinks, collapsible or poorly compacted soil, leaking pipes and stormwater, tree roots, overloading and corroding reinforcement. A repair that ignores the cause tends to crack again.
Repair Approaches and Their Limits
- Crack repair and stitching. Restores the wall, but does not stop ongoing ground movement.
- Underpinning. Deepens or widens existing foundations. Disruptive and needs an engineered design.
- Piling. Carries loads to firmer ground. Needs access for equipment and engineering input.
- Drainage. Removes water as a cause. Not a structural repair on its own.
- Waterproofing. Keeps moisture out. Does not repair movement.
- Concrete repair. Rebuilds damaged concrete. Corroding steel must be treated or the damage returns.
No method should be chosen before the property has been assessed.
How the Process Works
- Enquiry. Describe the damage and send photos.
- First look. A specialist reviews the photos or visits the site.
- Engineering assessment. Where movement is structural, a structural engineer investigates. This may include crack monitoring or a ground investigation.
- Repair specification. The repair method and scope are set out.
- Quotes. Contractors price the same scope so you can compare.
- Repair and sign-off. Work is done and inspected, with sign-off where an engineer designed it.
Structural Repair Prices
Ballpark prices so you can sanity-check a quote. They are not quotations and no contractor is bound by them.
| Item | Ballpark price |
|---|---|
| Structural assessment | R3,000 - R10,000 |
| Wall crack sealing or injection | R180 - R750 per metre |
| Foundation settlement repair | R15,000 - R45,000 per job |
| Underpinning | R1,200 - R35,000 per metre of wall |
| Pile foundations | R3,000 - R8,000 per metre of pile |
| Concrete repair (cracks, spalling) | R500 - R2,000 per area |
| French drain | R450 - R950 per metre |
| Below-ground tanking or membrane | R380 - R1,100 per m² |
Ballpark figures, not quotations. Ranges compiled from price guides and rate lists published by South African building-cost and contractor websites, checked 16 October 2026 and rounded. They are not our prices and no contractor is bound by them. Underpinning ranges differ widely between sources. Most sources do not say whether VAT is included, so confirm VAT on every quote.
Sources:
- HomeInspect, home inspection cost guide (2026)
- Cape Town Waterproofing, wall crack repair (2026)
- BuildersInGauteng, foundation repair pricing (updated November 2025)
- The Handyman Johannesburg, foundation construction costs (updated February 2026)
- ServiceLinkSA, waterproofing costs in South Africa (updated March 2026)
- Abacas Solution, French drain cost Cape Town (April 2026)
- Waterproofing Cape Town, waterproofing prices 2026 (August 2026)
What affects the price
- Extent of the damage and the cause
- Ground conditions and depth to firm soil
- Access for people and equipment
- Engineering, testing and approvals
- Excavation and temporary support
- Materials and repair system
- Reinstating floors, plaster, paint and paving
Get prices for your actual job rather than a range. Free, with no obligation to appoint anyone.
Compare Structural Repair QuotesProperty Types
Houses, townhouses and sectional title complexes, boundary and retaining walls, garages and outbuildings, and small commercial and industrial buildings. In sectional title schemes, the body corporate usually manages structural repairs to common property.
Structural Repair Services
Each service has its own page with methods, process and ballpark prices.
Structural & Foundations
Structural Repairs South Africa
Cracks, movement and damage: the full range of structural repairs
Underpinning South Africa
Strengthening and deepening support under existing foundations
Piling Contractors South Africa
New foundation piling and remedial piling for existing buildings
Walls & Concrete
Wall Crack Repairs South Africa
Crack assessment, crack stitching and repairs to masonry walls
Concrete Repairs South Africa
Damaged reinforced concrete slabs, beams, columns and balconies
Retaining Wall Repairs South Africa
Cracked, leaning and bulging retaining walls and their drainage
Concrete Spalling Repairs South Africa
Flaking concrete, exposed reinforcement and corrosion treatment
Expansion Joint Repairs South Africa
Failed joint sealants, water ingress and joint system replacement
Water & Ground
Subsoil Drainage South Africa
Below-ground drains around foundations and retaining walls
Foundation Waterproofing South Africa
Membranes and tanking for below-ground walls and foundations
Compare specialists through Foundation Repairs South Africa: one free request, quotes from independent contractors.
Frequently Asked Questions
Do I need a structural engineer?
For cracks or movement that may be structural, yes. An engineer finds the cause and specifies the repair, so contractors can quote on the same scope.
Is every crack structural?
No. Many fine plaster and shrinkage cracks are cosmetic. Cracks that grow, step through brickwork or come with sloping floors or sticking doors need an assessment.
Will insurance cover structural repairs?
It depends on your policy wording. Check with your insurer before work starts and keep photos and reports.
How long do structural repairs take?
A crack repair can take a day or two. Underpinning or piling can take several weeks, plus time for assessment and approvals.
Can I stay in the house during repairs?
Usually, yes, though some rooms may be out of use. The contractor confirms this once the method is known.
Do you do the repairs yourselves?
No. This is a quote-comparison service. Independent specialists and engineers assess, quote and do the work.
Foundation Repairs South Africa is a free quote-comparison service. Work is assessed, quoted and carried out by independent contractors and specialists, and your agreement is with the one you appoint. Ask each for a written quote, what is and is not included, who designs and signs off the work, proof of insurance and the payment terms before paying anything.
Structural Repairs South Africa. Describe the job once and compare quotes.
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