I used to charge about that 5 yr ago to build a wood deck.
If it needed balustrade it would go over £70m2
Staggering how much wood costs when buying all the framework and planks.
The screws mount up too.
Last deck i built had 800 screws!! Only about a 5x4 m2 area with a very sturdy 150x50 frame, I love my drill driver
Even after reading that @Accy cyclist had broken a hip slipping on decking, I was caught out by slippery decking on a holiday in Devon. The chalet we were staying at had a large decked patio, with a sloped access ramp. The main area had non-slip treatment but the ramp had been neglected. The first time I tried walking down it with my bike my feet shot from under me. The only thing that stopped me ending up in a twisted heap of man and bike was that I managed to break my fall by grabbing the handrail as I went down.
I'd recommend anyone who is thinking of building a decked area to address the friction issue from the start!
I built my decking last July using composite boards. These are the solid board types which can be screwed directly into a wooden frame. Size was 7 x 3.8 metres with a small step beside the back door. Decking cost was £800 in materials.