Estimate your renovation costs with precision for South African projects. Enter your renovation size and finish level below to get a ballpark budget before you speak to contractors.
💰 Cost Breakdown
What Is a Home Renovation Calculator?
A home renovation calculator estimates what your project will cost by combining the size of the space you’re renovating with a cost-per-square-metre rate that reflects your chosen finish level. It’s a starting point for budgeting, not a formal quote, but it gives you a realistic figure to work with before requesting quotes from contractors, so you can walk into those conversations with a sense of what’s reasonable.
How to Estimate Your Renovation Cost
Step 1: Measure the total floor area of the space you’re renovating, in square metres.
Step 2: Select your expected finish level, ranging from basic cosmetic updates to a full high-end renovation.
Step 3: Multiply your floor area by the appropriate cost-per-square-metre rate for your chosen finish level.
Step 4: Add a contingency of 10 to 20 percent to cover unexpected issues, which is standard practice for renovations in South Africa, particularly in older homes.
Home Renovation Cost Formula
Renovation Cost = Floor Area (m²) × Cost per Square Metre
Total Budget = Renovation Cost + Contingency (10-20%)
Worked Example
Say you’re renovating a 90 m² section of your home to a mid-range finish, at an estimated R8,000 per square metre.
Renovation Cost = 90 m² × R8,000 = R720,000
Adding a 15 percent contingency for unexpected issues brings your total planning budget to:
Total Budget = R720,000 + (R720,000 × 0.15) = R828,000
Average Renovation Costs Per Square Metre in South Africa
Renovation costs in South Africa vary considerably by finish level, region, and the scope of work involved. As a general guide for 2026:
- Basic/cosmetic updates: R2,500 to R5,000 per m², covering things like painting, minor fixture replacements, and simple flooring changes without structural work.
- Mid-range renovation: R6,500 to R12,500 per m², covering a full refresh with better-quality materials, updated kitchens or bathrooms, and some non-structural layout changes.
- High-end/structural renovation: R15,000 to R22,000+ per m², covering premium finishes, structural alterations such as removing walls, and bespoke design work.
Location also plays a meaningful role. Renovation rates in Gauteng and KwaZulu-Natal tend to sit toward the higher end of these ranges compared with more affordable regions, largely due to differences in land value and local labour costs.
Typical Costs by Room
Whole-home, per-square-metre estimates are useful for planning, but many renovations are room-specific. As a rough guide:
- Kitchen renovation: R60,000 to R300,000, depending on size, cabinetry, and appliance quality.
- Bathroom renovation: R30,000 to R120,000+, depending on fixtures, tiling, and whether plumbing needs to be relocated.
- Living space or bedroom refresh: R75,000 to R225,000, depending on flooring, built-in storage, and finish quality.
Factors That Affect Your Renovation Budget
Several factors can push your final cost above or below your initial estimate:
- The age and condition of your home, since older properties often reveal hidden issues like outdated wiring or plumbing once work begins.
- Whether the project requires structural changes, such as removing walls or altering the roofline, which typically require council-approved building plans.
- The quality of materials you choose, since the gap between standard and premium finishes can easily double the cost of a kitchen or bathroom.
- Professional fees, including architects and quantity surveyors where structural work is involved.
Budgeting for the Unexpected
Adding a contingency of 10 to 20 percent to your estimated renovation cost is standard practice among South African contractors and quantity surveyors. This buffer accounts for issues that only become visible once demolition starts, such as damaged subflooring, ageing electrical wiring, or water damage behind walls, and helps prevent a tight budget from derailing the project midway through.