ᐅ Costs for Shell Construction and Roof Covering/Insulation – Is a Fixed-Price Quote Acceptable?
Created on: 9 Oct 2018 13:40
B
Bau_dus
I am trying to assess whether the price offered to me for building a house is reasonable.
Model: An architect builds houses at a fixed price through his company. He purchases a plot of land, demolishes the existing buildings, and constructs two semi-detached houses on it. I am being offered the plot + demolition of existing structures + shell construction + roofing/insulation/gutters + garage at a fixed price (notary basis). The interior finishing will be contracted separately by me; for this, I have price quotes per trade, executing company, and scope of work from the architect. The architect does not earn any profit from the interior finishing (I only pay a flat fee of €5,000 (approx. $5,400) for his construction manager), meaning his profit is fully included in the “notary basis.”
After deducting the market price of the land, passed-on purchase-related costs + 50% of demolition costs (including basement) + subdivision, approximately €400,000 (approx. $430,000) remain for the fixed price covering planning + shell construction + roofing/-insulation + garage + profit.
Here is my estimated cost breakdown based on my research (I am not an expert) and I would appreciate your review for general accuracy:
Details: 1.5-story semi-detached house, 8 x 13 m (26 x 43 feet), attic converted into living space, reinforced concrete basement, built according to the 2016 Energy Saving Ordinance, about 1000 m³ (35,300 ft³) enclosed volume (my calculation based on sections).
1) Earthworks + shell construction: approx. €150,000 (approx. $161,000)?
(Basement: 36.5 cm (14 inches) masonry or concrete, party wall made of sand-lime brick; load-bearing masonry: sand-lime brick + 120 mm (5 inches) core insulation + facing bricks (€0.5 per brick), non-load-bearing: sand-lime brick/brick/plaster walls; ceilings: reinforced concrete, stairs from basement to attic: reinforced concrete)
2) Masonry + facing bricks garage 9 x 5 m (30 x 16 feet): approx. €30,000 (approx. $32,000)?
3) Roofing + insulation + gutters: approx. €50,000 (approx. $54,000)?
(approx. 160 m² (1,720 ft²) roof area (my calculation based on sections), roof frame made of softwood, quality concrete tiles on roof membrane, gutters + downspouts in zinc, insulation meets requirement for living attic and attic conversion)
4) Architect and engineering services: approx. €35,000 (approx. $38,000)?
Subtotal costs: €265,000 (approx. $284,000)
Remaining amount (€400,000 - €265,000): €135,000 (approx. $145,000)
- of which VAT: €22,000 (approx. $24,000)
- of which profit/margin: €113,000 (approx. $121,000)
a) Does this allocation of the fixed price seem realistic?
b) Is the margin/profit typical for the market, considering that no additional profit comes from the interior finishing?
Thank you in advance for any feedback!
Model: An architect builds houses at a fixed price through his company. He purchases a plot of land, demolishes the existing buildings, and constructs two semi-detached houses on it. I am being offered the plot + demolition of existing structures + shell construction + roofing/insulation/gutters + garage at a fixed price (notary basis). The interior finishing will be contracted separately by me; for this, I have price quotes per trade, executing company, and scope of work from the architect. The architect does not earn any profit from the interior finishing (I only pay a flat fee of €5,000 (approx. $5,400) for his construction manager), meaning his profit is fully included in the “notary basis.”
After deducting the market price of the land, passed-on purchase-related costs + 50% of demolition costs (including basement) + subdivision, approximately €400,000 (approx. $430,000) remain for the fixed price covering planning + shell construction + roofing/-insulation + garage + profit.
Here is my estimated cost breakdown based on my research (I am not an expert) and I would appreciate your review for general accuracy:
Details: 1.5-story semi-detached house, 8 x 13 m (26 x 43 feet), attic converted into living space, reinforced concrete basement, built according to the 2016 Energy Saving Ordinance, about 1000 m³ (35,300 ft³) enclosed volume (my calculation based on sections).
1) Earthworks + shell construction: approx. €150,000 (approx. $161,000)?
(Basement: 36.5 cm (14 inches) masonry or concrete, party wall made of sand-lime brick; load-bearing masonry: sand-lime brick + 120 mm (5 inches) core insulation + facing bricks (€0.5 per brick), non-load-bearing: sand-lime brick/brick/plaster walls; ceilings: reinforced concrete, stairs from basement to attic: reinforced concrete)
2) Masonry + facing bricks garage 9 x 5 m (30 x 16 feet): approx. €30,000 (approx. $32,000)?
3) Roofing + insulation + gutters: approx. €50,000 (approx. $54,000)?
(approx. 160 m² (1,720 ft²) roof area (my calculation based on sections), roof frame made of softwood, quality concrete tiles on roof membrane, gutters + downspouts in zinc, insulation meets requirement for living attic and attic conversion)
4) Architect and engineering services: approx. €35,000 (approx. $38,000)?
Subtotal costs: €265,000 (approx. $284,000)
Remaining amount (€400,000 - €265,000): €135,000 (approx. $145,000)
- of which VAT: €22,000 (approx. $24,000)
- of which profit/margin: €113,000 (approx. $121,000)
a) Does this allocation of the fixed price seem realistic?
b) Is the margin/profit typical for the market, considering that no additional profit comes from the interior finishing?
Thank you in advance for any feedback!
Bau_dus schrieb:
For me, the million is basically reached with the estimate of €150,000 for interior finishing... Yes, I realized that afterward too...
780,000 purchase price, 50,000 building tax, 10,000 notary + land registry, 10,000 utility connections, 150,000 finishing, which some consider insufficient. That’s it.
But in the end, the question of what the architect earns doesn’t help much. Whether he paid only 650,000 or 750,000 for the land, who knows?
The real question is whether you want and can invest the money in the house. Or if something better might still come up?
A clear ceiling height of 2.9m (9.5 feet) is not standard either. There will be flush-fitting doors of 2.2m (7.2 feet), solid core swinging... 1,200€ - 1,500€ each.
Right now, it seems like money is being printed in the construction industry.