I would never have built either if I had oriented myself to the prices here in the forum:
Rough summary:
House:
Planner: 8,300 euros
Surveyor: 2,000 euros
Ordnance survey: 400 euros
Building permit: 1,200 euros
Structural engineer: 1,000 euros
Land development: 10,250 euros
Kitchen: 10,000 euros
Construction electricity: 700 euros
Construction water: 500 euros
Shell construction (foundation slab / intermediate ceiling / masonry / windows / screed / interior plaster / drywall): 80,000 euros
Electrical installation: 7,500 euros
Heating/plumbing: 18,000 euros
Quarter-turn staircase: 3,000
Tiler: 5,000 euros
Subtotal: 145,150 euros
Performed with own work:
Construction of roof truss: 3,700
Wood for roof truss: 1,800 euros
Roof tiles: 4,100 euros
Painter / floor laying / interior doors: 6,500 euros
Subtotal: 16,100 euros
Total sum: 161,250 euros
Outdoor facilities: 140 sqm paved for 9,000 euros
Garage (5.5m x 6m) + carport (3.5m x 6m) self-built: approx. 10,000 euros + 1,750 euros sectional door
Wooden terrace roof, self-built (approx. 5m x 4m): 2,000 euros
Wooden garden shed, self-built (approx. 3.20 x 4.80 meters) for approx. 2,500 euros (wood, materials, roofing felt, welding membrane, etc.).
60 meters chain-link fence with foundation self-installed: 700 euros
20 meters rod mat fence self-installed + intermediate pillars self-built: 800 euros
4m cantilever electric sliding gate + gate 1m x 1m: 3,400 euros
Outdoor facilities: 30,450 euros