ᐅ Cost Estimation of a Prefabricated House

Created on: 26 Aug 2020 18:37
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TangoDeltaLima
T
TangoDeltaLima
26 Aug 2020 18:37
Hello everyone,

we would like to hear your opinions and feedback on our cost estimate.
Is this calculation realistic?

A few details in advance:
We live in the southern part of Baden-Württemberg. The potential plot of land is 746 sqm (8000 sq ft). The application has been submitted. The plot is fully serviced and is not on a slope.
Hoping that we will get the plot, we started to calculate what our single-family home can cost.
A financial confirmation for 500,000 € already exists.

Equipment preferences:



















































KfW 40 standard energy efficiency Foundation slab or basement will be contracted by us Shell construction, floor plan 140 sqm (with basement 130 sqm), rectangular, no bay windows
Gable roof with eaves Air-to-water heat pump with cooling function Underfloor heating
Ventilation system Photovoltaic system Gutters with drainage and cistern
Straight staircase without winders, no solid wood Electric exterior blinds with guide rails in gray Front door with fingerprint or code access (module separately installed next to door)
Doorbell with camera Interior doors (possibly sliding doors depending on floor plan) Gray uPVC triple-glazed windows
No skylights One sliding lift-and-slide door Knee wall height 230 cm (7 ft 7 in)
Tiling in all rooms Sanitary fixtures with wall tiles up to 130 cm (51 inches) Walk-in shower without glass door, 100x100 cm (39x39 inches)
Double washbasin with two faucets Rain shower No plastic bathtub (freestanding corner or oversized tub)
Room lighting (larger recessed ceiling spotlights) Smart home (controlled via smartphone) lighting, blinds, heating Electricity and water connections for outdoor area
Outdoor water tap


Rooms:





















Open kitchen-living-dining area ground floor Guest room (only if basement is included) ground floor Guest bathroom (including walk-in shower with glass panel) ground floor
Pantry (only with foundation slab) ground floor Entrance hall ground and upper floor Bedroom upper floor
Dressing room upper floor Master bathroom upper floor Study room upper floor
Exercise room without equipment upper floor Utility room (on foundation slab in ground floor, otherwise in basement)


Now to the cost estimate:















































































































Type of purchase
%
Plot of land
104,400.00
Notary fee
1.26
1,315.94
Land registry fees
0.70
731.08
Property transfer tax
5.00
5,222.00
Soil survey
0.50
1,365.00
Building contract review
0.90
2,457.00
Building application
0.50
1,365.00
Building permit / planning permission
0.70
1,911.00
Structural engineering inspection
1,000.00
Surveyor
2,500.00
Building consultant
200.00
Builder’s liability insurance
300.00
Construction performance insurance
0.40
1,092.00
Construction water
600.00
Construction electricity
800.00
Excavation and earth removal
11,000.00
Water, sewage, wastewater connections
9,000.00
Electricity connection
2,500.00
Telephone connection
799.95
Total excluding house
148,598.97


What remains:







€/sqm
sqm






































Budget
500,000.00
Total excluding house
148,598.97
Remaining budget for house
351,401.03
House budget
273,000.00
2,100.00
130
Basement or foundation slab
?
Absolute remaining budget for garage (single garage if basement, otherwise multi-car garage), kitchen, landscaping and possibly furniture
78,401.03


Does this seem reasonable and realistically calculated?

Furthermore, we have our first consultation appointment with FischerHaus GmbH coming up soon. We are not quite sure how to best prepare for it.
What is typically discussed during this first meeting?

One thing that causes us some anxiety is the salesperson asking about our budget. Of course, the salesperson needs some "room to maneuver," but I want to avoid them selling us a house below its actual value just because they know our budget.
T
TangoDeltaLima
26 Aug 2020 18:38
The tables work perfectly fine here.
K1300S27 Aug 2020 10:01
An interesting and actually not a bad approach to work backwards from the available budget. (It always reminds me a bit of my childhood and going to the corner shop, asking for as many gummy bears as possible for 50 pfenning.)

Overall, I find the financial calculation fairly reasonable. However, you should consider that from the remaining 78,401.03 EUR, at least the flooring and wall coverings still need to be paid for — that already reduces the budget by around 20,000 EUR. (Are you planning to contribute any personal labor?) Oh, and with the 140 m² (without basement — which will be noticeably more expensive anyway), I am left with only 57,401.03 EUR.

I do see the problem that your desired room layout might not fit into the intended 140 m². Also, I notice the absence of the children’s bedroom(s), which, by definition, is necessary for a parents’ bathroom to exist. Realistically, you would probably need a cautious estimate of 160+ m², and then the budget starts to run out, especially since we haven’t yet discussed any upgrades.

All in all: It’s good to have a detailed plan, but overall, it looks a bit tight unless the budget is increased or the room program is reduced.

Edit: Just noticed that you’re considering KfW 40. That will increase costs further and doesn’t align with the 2,100 EUR/m² price.
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Pinkiponk
27 Aug 2020 10:23
TangoDeltaLima schrieb:

Furthermore, we have our first consultation with FischerHaus GmbH coming up soon. At the moment, we’re not sure how to best prepare for it.
What exactly will be discussed during the initial meeting?

If you like, and haven’t done so yet, you can download the architectural brochures, take a look at the floor plans to see which one appeals to you most, adapt it to your preferences, and bring it with you to the initial consultation.

As always, a word of caution at this point: since the plot of land is not yet owned by you, → do not sign any preliminary contracts with supposed cancellation rights (and possibly offered land brokerage) or similar. House sellers often try this because ultimately, they don’t care if or where you build; for them, it’s all about selling the house.
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TangoDeltaLima
27 Aug 2020 15:04
Is it allowed here, or in general, to publish prices from the prefab home builder?
K1300S27 Aug 2020 15:36
Sure. Only links to external websites are not welcome – and evaluations (of companies in general) are only allowed in the appropriate moderated forum.