How much do composite stairs cost? Check prices and example quotes.
Planning to install composite stairs? Find out how much composite stairs cost, see an example price per step and get an approximate materials estimate. Find out what to look out for.
Composite stairs are becoming an increasingly popular choice among homeowners, particularly those with a terrace, garden or raised entrance. It is no surprise — they are durable, attractive and weather-resistant. But what does the cost of composite stairs look like in practice?
Well, there is no single answer, as it all depends on several factors. But don’t worry! In this article, we’ll clear up any doubts and give you an idea of how much money you’ll need to set aside.
What affects the cost of composite stairs?
Let’s start with the basics — before we get to the specific figures, it’s worth understanding what goes into the final price:
Type of composite decking board.
- Solid – more expensive, heavier and more durable,
- Hollow (chambered) – cheaper and lighter, but less resistant to mechanical damage.
Material grade.
- Premium decking boards (wood-effect, anti-slip) can cost as much as 300 zł/m²
- Budget versions start at 120–150 zł/m²
Number of steps and their dimensions.
- More steps = more material = higher cost,
- A standard step is approx. 30 cm deep and 15 cm high.
Supporting structure.
- Do you already have a concrete or steel frame?
- Does it still need to be built?
Labour.
- DIY installation = savings, but requires tools and know-how
- A professional = convenience, but you’ll need to pay (often 150–300 zł per step)
Price per step – estimated costs.
Now for the specifics. Let’s assume you’re installing outdoor composite stairs leading from a terrace to the garden, for example, with 3–5 steps.
1. Material (composite decking board).
On average, approx. 0,6 m² of decking board is needed for one step (front + top surface).
Example:
- Mid-range composite decking board: 180 zł/m²
- Material cost for 1 step: 0,6 × 180 zł = 108 zł
2. Steel or concrete structure.
- Prefabricated steel frame: 100–250 zł/step
- Concrete structure (if it needs to be poured): more expensive, from 150 zł/step
3. Labour.
- Installation of one step: approx. 150–300 zł
- The more complicated the stairs (e.g. winder stairs), the higher the cost
Estimated cost of 1 step (mid-range material):
| Item | Unit cost |
|---|---|
| Composite decking board | 108 zł |
| Steel structure | 150 zł |
| Installation | 200 zł |
| Total for 1 step | 458 zł |
Costing for composite stairs – example calculations.
Right, let’s work through a few typical scenarios. Let’s assume mid-range composite decking boards (180 zł/m²) + a steel structure + professional installation.
Example 1: 3-step composite stairs.
- 3 × 458 zł = 1374 zł
Ideal for access from a garden terrace or a landing by a balcony door.
Example 2: 5-step composite stairs.
- 5 × 458 zł = 2290 zł
Typical for access from a raised terrace to the garden.
Example 3: 8-step composite stairs with a concrete base.
- Decking boards: 8 × 108 zł = 864 zł
- Concrete structure: 8 × 180 zł = 1440 zł
- Installation: 8 × 200 zł = 1600 zł
- Total: 3904 zł
A more demanding structure, but super stable and durable.
How about DIY? Cost of stairs when installing them yourself.
Are you good at DIY? Great! In that case, you can save as much as 30–40% of the cost.
- Composite decking boards: 180 zł/m²
- Steel structure (ready-made components or angle brackets): ~100–120 zł/step
- Small materials (screws, washers, finishing strips): ~20 zł/step
DIY cost per step: approximately 230–270 zł.
What should you look out for when pricing composite decking steps?
Hidden costs that may surprise you:
- Transporting boards – composite can be heavy,
- Cutting materials – may require specialist tools,
- Installation system – clips, substructure, finishing strips.
Good to know:
- Always allow for 10–15% extra material – for mistakes and offcuts,
- Board colour and texture can affect the price (e.g. wood grain),
- Some companies offer stair packages – materials + installation included in the price.
FAQ – Frequently asked questions.
Are composite decking steps more expensive than wooden ones?
Initially – yes. But in the long term, thanks to zero maintenance and greater durability, they often prove more cost-effective.
How much does a composite decking board for steps cost?
Depending on the grade and manufacturer: from 120 zł/m² up to 300 zł/m².
Can composite decking steps be installed on existing concrete?
Yes! All you need is a suitable substructure (e.g. spacer strips) and fixings. This is one of the cheapest installation options.
Is it worth investing in a more expensive board?
If you value appearance, durability and convenience – definitely. Especially on steps that are subject to heavy use.
Instead of a summary – How can you optimise the cost of composite decking steps?
Want to save money without compromising on quality? Here are a few top tips:
- Compare prices from different suppliers – sometimes the differences reach 30–40 zł/m²,
- Buy in bulk – larger quantities often qualify for a discount,
- Invest in a durable structure – do it properly once,
- If you can, install it yourself or get help from a DIY-savvy friend.
DUO composite decking board 23x148 - 3,5 m
Price per 1 linear metre of board: 21,30 zł
Composite decking board 2,2x14,5 cm. Gardin Deco 2.0 4,0 m.
Price per 1 linear metre of board: 45,90 zł
DUO composite decking board 23x148 - 5,0 m
Price per 1 linear metre of board: 21,30 zł
Gardin Plus 2.0 composite decking board - 4m
Price per 1m of decking board: 24,79 zł
