Aluminium window prices in South Africa start from R860 at Inso, for a 600 x 600 mm top-hung window in matt charcoal. Standard sizes go up to R5,980 for a 2,400 x 1,800 mm side-hung window. Popular sizes such as 900 x 900 and 1,200 x 1,200 mm cost between about R1,380 and R2,220. All prices below come from Inso’s current price list. Get your instant quote
Table of Contents
Aluminium Window Prices in South Africa by Window Type
The table below lists every standard size in Inso’s Comfort 30.5 casement range. All prices are for a matt charcoal frame with 4 mm float glass as standard. Prices are rounded to the nearest rand and are including/excluding VAT.
| Size (W x H, mm) | Top-hung (awning) | Side-hung (casement) |
|---|---|---|
| 600 x 600 | R860 | – |
| 900 x 600 | R1,047 | – |
| 1200 x 600 | R1,231 | – |
| 1500 x 600 | R1,356 | – |
| 1800 x 600 | R1,984 | – |
| 2400 x 600 | R2,234 | – |
| 600 x 900 | R1,107 | R1,107 |
| 900 x 900 | R1,382 | R1,422 |
| 1200 x 900 | R1,594 | R1,568 |
| 1500 x 900 | R1,740 | R1,714 |
| 1800 x 900 | R2,585 | R2,534 |
| 2400 x 900 | R2,878 | R2,826 |
| 600 x 1200 | R1,231 | R1,294 |
| 900 x 1200 | R1,528 | R1,697 |
| 1200 x 1200 | R2,220 | R1,865 |
| 1500 x 1200 | R2,388 | R2,104 |
| 1800 x 1200 | R2,803 | R3,003 |
| 2400 x 1200 | R3,860 | R3,480 |
| 600 x 1500 | R1,860 | R1,569 |
| 900 x 1500 | R2,308 | R2,131 |
| 1200 x 1500 | R2,666 | R2,320 |
| 1500 x 1500 | R2,855 | R2,509 |
| 1800 x 1500 | R3,360 | R3,784 |
| 2400 x 1500 | R4,653 | R5,024 |
| 600 x 1800 | R2,116 | R1,821 |
| 900 x 1800 | R2,660 | R2,734 |
| 1200 x 1800 | R3,475 | R3,179 |
| 1500 x 1800 | – | R3,684 |
| 1800 x 1800 | R4,582 | R4,969 |
| 2400 x 1800 | R5,471 | R5,980 |
Sizes are listed as width x height and use the standard aluminium window size names. The actual frame is 10 mm smaller: a 600 x 600 window measures 590 x 590 mm.
How Much Does a Sliding Window Cost?
A standard aluminium sliding window starts from R1,400 and can reach R4,500 for wider spans or premium finishes. Sliding windows are among the most popular choices for South African homes because they ventilate well without protruding into outdoor areas, making them ideal for narrow side passages and busy family rooms.
Wider sliding windows, such as those spanning 1,800 mm or more, sit toward the upper end of that range. The glazing choice also plays a role: clear float glass is the base option, while tinted, laminated, or double-glazed units each add to the overall cost.
You can explore the full sliding window range on the aluminium sliding windows page.
How Much Does a Top-Hung (Awning) Window Cost?
Aluminium top-hung (awning) windows cost from R860 (600 x 600 mm) to R5,471 (2,400 x 1,800 mm). The sash is hinged at the top and opens outward, so the window can stay open in light rain. This makes top-hung windows a practical choice for bathrooms, kitchens and high-level ventilation during Highveld afternoon storms.
Larger top-hung windows combine opening sashes with fixed panes. For example, the 1,800 x 600 mm window has an opening sash on each side of a fixed centre pane and costs R1,984. Taller sizes stack two opening sashes on top of each other for extra airflow.
How Much Does a Side-Hung (Casement) Window Cost?
Aluminium side-hung (casement) windows cost from R1,107 (600 x 900 mm) to R5,980 (2,400 x 1,800 mm). The sash is hinged at the side and swings outward like a door. This gives strong airflow and a clear view when the window is open.
On the 1,800 mm and 2,400 mm wide sizes, two side-hung sashes frame a large fixed pane. This layout suits living rooms and bedrooms that need both a view and ventilation.
Is a Top-Hung or Side-Hung Window Cheaper?
Neither style is always cheaper. The price depends on how each size is configured, meaning how many opening sashes and fixed panes it has.
For example, a 1,200 x 1,200 mm top-hung window has two opening sashes and costs R2,220, while the side-hung version has one opening sash and costs R1,865. At 1,800 x 1,500 mm the order flips: top-hung costs R3,360 and side-hung costs R3,784. Compare your exact size in the table above.
Not sure which style suits each room? See our guide to the types of aluminium windows.
How Much Do Aluminium Windows Cost per Square Metre?
Inso’s aluminium windows work out to roughly R1,130 to R2,470 per square metre. Smaller windows cost more per square metre, because the frame and hardware make up a bigger share of the price.
- A 600 x 600 mm top-hung window costs about R2,470 per m².
- A 1,500 x 1,500 mm side-hung window costs about R1,130 per m².
Per-square-metre figures are useful for rough budgeting, but windows are priced by size, so use the table for accurate numbers.
What’s Included in These Prices?
Every window in the price list includes:
- Frame: the Inso Comfort 30.5 aluminium profile in matt charcoal.
- Fittings: the matching C30.5 window fittings.
- Glass: 4 mm float glass as standard.
- All 1,800 mm-high windows include 6.38 mm laminated safety glass, as required for low-level glazing.
- Some of the widest windows use 5 mm float glass for the large fixed pane.
- Thermal performance: U-values of 6.00 to 6.28 W/m²K.
How Much Does a Cottage Pane Window Cost?
Cottage pane windows start from R1,800 and can reach R5,500 depending on size and the number of glazing bars. The divided-light aesthetic suits Cape Dutch, Victorian, and farmhouse-style properties, and aluminium profiles hold that look with far less maintenance than timber.
Because each pane division requires additional profile and glazing work, cottage pane windows generally sit above sliding or fixed units of the same size. That said, the visual return is significant, particularly on street-facing elevations where character and kerb appeal matter.
How Much Do Bronze and Charcoal Aluminium Windows Cost?
Bronze and charcoal finishes have become the preferred choice for contemporary homes, and both are available across Inso’s full window range. Expect to add roughly 8 to 15 per cent to the base unit price for a powder-coat colour finish.
On a sliding window priced at R2,000 in mill finish, a charcoal finish would typically bring the unit to between R2,160 and R2,300. That difference is modest against the visual impact of a dark-framed window on a white or light-toned façade.
You can view colour options for charcoal aluminium windows and bronze aluminium windows in Inso’s dedicated range pages.
Are Installation Costs Included in These Prices?
No. The prices in the table above are for the window unit only. Installation is quoted separately and depends on a few practical factors: the number of windows, access difficulty, the condition of the existing opening, and whether any brickwork or plastering is required after fitting.
As a general guide, installation per window in a straightforward residential project typically ranges from R400 to R900 per unit. More complex openings, such as those requiring lintel adjustments or significant reveal work, will cost more. Inso’s quotes include a clear breakdown of supply and installation so there are no surprises once the work begins.
What Affects Aluminium Window Prices in South Africa?
Size is the single biggest variable. A 600 x 600 bathroom window and a 1,800 x 1,200 living room slider are both aluminium windows, but they sit at opposite ends of the price spectrum. Beyond size, four factors consistently move the price up or down.
- Glazing type: Clear float glass is the base. Tinted, obscure, laminated, and double-glazed units each carry a higher cost, with double glazing being the most significant addition.
- Colour finish: Mill and white are standard. Bronze, charcoal, and custom RAL colours are powder-coated and priced accordingly.
- Opening mechanism: Fixed windows cost less than sliding or hinged equivalents of the same size because they have fewer moving parts and no hardware.
- Quantity: Projects involving ten or more windows often attract better pricing per unit than single-window replacements. It is worth discussing this with Inso when planning a full renovation or new build.
A full breakdown of what drives the variation in aluminium window prices is covered in Inso’s aluminium windows pricing guide, which is worth reading before you commit to a specification.
How to Get an Exact Price for Your Windows
The ranges above give you a reliable starting point for budgeting, but every opening is different. The fastest way to get accurate aluminium window prices for your South Africa project is to contact Inso directly with your measurements, preferred window type, and colour choice.
Inso serves homeowners, architects, and developers across Cape Town, Johannesburg, Pretoria, and surrounding areas. You can browse the full aluminium windows range to identify the style that suits your home before reaching out.
For pricing that matches your exact specifications, contact Inso for a personalised quote. Bring your measurements and your preferred finish, and the team will turn it around quickly.
Frequently Asked Questions
What is the starting price for aluminium windows in South Africa?
Aluminium windows from Inso start from R860 for a compact fixed or 600 x 600 unit. Most standard residential windows fall between R1,200 and R6,500 depending on type, size, and finish.
How much does a sliding aluminium window cost?
Sliding aluminium windows start from R1,400 for a standard size. Wider spans and premium finishes can bring the price to R4,500 or more per unit, before installation.
Are charcoal and bronze windows more expensive than white ones?
Yes, but only modestly. Powder-coat colour finishes such as charcoal and bronze typically add 8 to 15 per cent to the base unit price compared with white or mill (silver) options.
Is installation included in Inso’s window prices?
No. Unit prices and installation are quoted separately. Installation typically ranges from R400 to R900 per window for straightforward residential openings, and Inso provides a clear breakdown in every quote.
Do aluminium window prices vary by location in South Africa?
Unit prices are consistent across Inso’s branches. Installation costs may vary slightly depending on site access and travel, but Inso serves Cape Town, Johannesburg, Pretoria, and surrounding areas with the same product standards and pricing transparency.
Where can I see aluminium window prices before requesting a quote?
Inso’s aluminium windows pricing guide provides indicative ranges by window type. For exact pricing, contact Inso directly with your measurements and specification requirements.
