Price guide · Builders
How much does a second storey addition cost?
- Prices checked November 2026
Price guide
What it costs
House extension construction
From Sinqobile Construction's published prices in Gauteng, checked November 2026.
More prices
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Second-storey addition
From R650,000 per job
From Scotch Score Holdings' published prices in Johannesburg, checked November 2026.
What these prices include: Per m² rates are for building only; plans, council fees and an engineer are extra unless a line includes them.
What changes the price:
Get a price for your job
Tell us the job and a builders pro that covers your area calls you with a written quote.
What you can ask for
- Renovations (Bathrooms, Kitchens, Other Rooms)
- New Building (Houses, Granny Flats, Garages)
- Additions and extensionsAn extra room, garage or second storey.
- Boundary wallsBrick or block walls around your property.
- BricklayingWalls, braais, planters and small structures.
- PlasteringInside and outside walls plastered or replastered.
More checked prices
Factors Affecting Cost Of Formwork In Construction
- 100 mm ground-floor slab using 25 MPa concrete, installed (Gauteng): Ground-floor slab (100 mm, 25 MPa) R450 – R800 /m²
- 25 MPa structural ready-mix delivered to site; pumping, formwork, reinforcement and labour excluded (Gauteng): R1,750 – R2,100 /m³
Prices checked 13 November 2026 ›
How much do bricklayers cost?
- Building and plastering: screen, feature and boundary walls, labour only: R350 per m²
- Stock brick wall; materials, labour and mortar (Gauteng): Stock brick wall (per m²) | R150 – R220 /m²
Prices checked 12 November 2026 ›
How much does a concrete retaining wall cost?
- Concrete retaining wall up to 1.5 m high; contractor's published guide range (Gauteng): Retaining wall (up to 1.5 m) | R2,500 – R5,000 /lin. m
- Retaining wall block; indicative supply price, size unspecified (Pretoria): Retaining Wall Blocks R60
Prices checked 12 November 2026 ›
How Much Does An Average Bathroom Renovation Cost?
- Standard bathroom remodel (Gauteng): R35,000 – R75,000
- Mid-range full renovation, including supply and installation (Gauteng): R55,000 – R120,000
Prices checked 13 November 2026 ›
How much does concreting cost?
- 100 mm ground-floor slab using 25 MPa concrete, installed (Gauteng): Ground-floor slab (100 mm, 25 MPa) R450 – R800 /m²
- 100 mm reinforced concrete driveway, installed (Gauteng): Concrete driveway (reinforced, 100 mm) R300 – R450 /m²
Prices checked 13 November 2026 ›
Questions about these prices
Where do these prices come from?
From Sinqobile Construction and Scotch Score Holdings: businesses that publish their own prices. We copied the figures as published and checked them on 13 November 2026. They are not quotes; every pro sets their own price.
Do I have to hire the pro who quotes?
No. You decide once you have the written quote.
The full guide
General advice, written April 2024.
When it comes to expanding your home, you're faced with two main choices: extending outwards or adding a second floor. Some homeowners shy away from the idea of building upwards, fearing that the costs will significantly surpass those of a ground-floor extension. But what's the real cost of adding a second story?
This variance largely depends on the materials used and the complexity of the project. Additionally, if your existing ground-floor structure needs reinforcement to support the new upper level, this will also affect the overall cost. Don't forget to factor in extra expenses such as council fees and the cost of obtaining engineer reports.
Interested in getting a more detailed estimate for your second-story addition? It's always best to consult with professionals who can provide a tailored quote based on your specific needs and the particulars of your property.
Comparing Costs: Second Storey Addition vs. Ground Floor Extension
Deciding between adding a second storey or extending your home on the ground floor often comes down to cost and convenience. Generally, second storey additions are more cost-effective than ground floor extensions. The significant expense of laying new foundations for a ground floor extension can drive up costs beyond those associated with building upwards.
However, opting for a second storey does come with its own set of challenges, particularly in terms of disruption. A ground floor extension might allow you to live relatively undisturbed during construction, as builders work externally. In contrast, adding a second storey requires internal access, meaning more intrusion into your daily life.
Additionally, since constructing a second storey involves replacing your roof, you might need to seek temporary housing until the new level is weatherproofed. This necessity for alternative accommodation could introduce unexpected costs to your project.
Benefits of a Second Storey Addition
Opting for a second-storey addition comes with a host of advantages beyond just being cost-effective. Here’s why it might be the right choice for your home:
- More Space: Similar to other extensions, a second storey provides additional room for bedrooms, bathrooms, or storage without eating into your outdoor area.
- Preserve Outdoor Space: You won’t have to sacrifice garden space for the sake of expansion.
- Enhanced Privacy and Views: Upper floors offer more seclusion from neighbours and potentially scenic views that extend past your property line.
- Increased Home Value: Though a significant investment, a second storey can substantially boost your property’s market value.
Selecting a Builder for Your Second Storey Addition
Ensuring a smooth and hassle-free renovation means picking a builder with specific expertise in second-storey additions. Don’t just take their word for it; verify their claims by checking out their past projects and talking to former clients. You want a team that’s not only skilled but also minimizes disruption to your daily life and respects your privacy.
Experienced builders can achieve a waterproof stage for your addition in just two to three weeks, allowing you to return to normal life with only minor inconveniences. Once the project is complete, they should leave your home clean, tidy, and ready for immediate use.
To find the best fit for your project, it’s wise to gather and compare quotes from several reputable builders in your area.
How it works
- 1
Tell us the job
- 2
A builders pro who covers your area calls you
- 3
Get a written quote and decide