ᐅ New Single-Family Home Construction – Join Us on Our Journey!

Created on: 4 Aug 2022 16:13
G
gregman22
Dear community,

We are finally getting a step closer to realizing our dream of building a single-family home.
The plot has been purchased, building plans have been reviewed, construction method decided, and so on. We have now commissioned the architect of the general contractor (GC) of our choice with the planning task and are currently fine-tuning the house design. I would love to take you along on this journey and incorporate your valuable feedback.

At this stage, the focus is on the house design.

Basic data:
Plot: 1062m2 (11,433 sq ft); approx. 25.5m x 41.64m (84 ft x 137 ft)
Orientation: Northwest -> The arrow in the screenshot of the 3D view points south


Desired room layout:
Ground floor:
  • Large living/dining area with adjacent (but separable) kitchen at the bottom left, plus a gallery overlooking the first floor
  • Utility room
  • Guest toilet
  • Garage
  • Separate apartment at the top right with its own entrance for parents-in-law

First floor:
  • Gallery overlooking the ground floor
  • 2 children’s bedrooms with a shared bathroom
  • 1 playroom (initially a home cinema room, later to be repurposed) above the garage
  • Master wing with main bedroom, dressing room, and bathroom

Attic:
Note: I am still discussing this with the architect. Due to the hipped roof shape, the actual living area has shrunk too much. Therefore, further discussion is needed to accommodate the other rooms. I had underestimated the ratio of gross floor area to usable living space.
  • 2 separate offices
  • 1 guest bedroom
  • 1 small guest bathroom

Basement:
  • 1 technical room
  • 1 laundry room
  • 1 storage room
  • Large fitness room
  • Wellness room with sauna

Additional plans:
  • Air-to-air heat pump or air-to-water heat pump
  • Photovoltaic system with/without battery storage
  • Possible pool (3.5/4m x 8m or 3.5/4m x 12m) with heat pump (and countercurrent system)
  • Sauna in the basement room
  • Air conditioning for various rooms
  • Smart home system – most likely via KNX
  • Garden: Currently planning 2 terraces – one to the left, slightly more to the south, and one facing the main part of the plot further north

Now to my first questions for you:
  • How do the floor plans strike you? Do they make sense in terms of the dynamics of family life?
  • The location of the separate apartment was chosen based on our wish. We wanted a strict, clearly defined spatial separation with a separate entrance. Do you have any comments on this?
  • Do you consider the utility rooms in the basement to be adequately sized (considering KNX, heat pump, etc.)?

My biggest construction challenge at the moment is the layout of the attic. There are two alternatives:
- Change the roof type, which would increase costs but provide more usable living space in the attic
- Give up the playroom on the first floor, convert it into a guest room, and build only the two offices in the attic (no guest room or bathroom)

Thank you in advance for your comments.

Modern two-story single-family house with gable roof, garage, terrace, and garden.


Attic floor plan: workspaces, guest room, corridor, guest bathroom, attic storage.


Floor plan of a residential house with bedrooms, balcony, bathroom, gallery, and stairs.


Floor plan: open living/kitchen area, bedroom, bathroom, utility room, terrace, garage.


Basement floor plan: two basement rooms, storage, technical room, laundry room, corridor, and stairs.
S
soneva2012
16 Aug 2022 19:58
I find the cost estimation to be realistic.

For the photovoltaic system, I would plan an additional 10,000 (10TE) due to the pool. We ordered a large storage unit to heat the pool and are now around 40,000 (40TE).

Lighting consultation and design also cost something for a project like this—easily 15,000 to 20,000 (15-20TE) if you want quality spots and lamps (not the €11 store-bought spots).

A structural engineer would be about 10,000 (10TE) if you are not building a simple, straightforward design.

I can’t think of much else right now. Maybe a fireplace? Another 10,000 (10TE) for the kitchen if you want many appliances?
A
aero2016
16 Aug 2022 23:36
ypg schrieb:

Current standard is around 3000 per square meter (about 280 per square foot) – you want to plan for 4000 per square meter (about 372 per square foot). That’s a quarter more 😉
4000 is actually one third more than 3000.
Y
ypg
16 Aug 2022 23:49
aero2016 schrieb:

4000 is one third more than 3000.
Yep! You're right. But basically, it doesn't matter for anyone who understands it and knows how to manage their money well 😀 Who really pushes it to the limit anyway?
E
Elokine
17 Aug 2022 08:34
I also think that around 4,000 per square meter could be a good estimate. Apart from the interior and exterior painting, we have now contracted everything else and are ending up at about 3,400.

Northern Bavaria, 220 sqm (2,368 sq ft), with some extras like controlled residential ventilation, an open space area, and a large dormer. At least these three extras you mentioned should already be included in the 4,000.

Additional cost components:
  • Ground source heat pump: The flat-rate construction costs already include the installation of an air-to-air/air-to-water heat pump. Therefore, I was advised to calculate with a buffer of €20,000 (approx. $22,000) for the upgrade to a ground source heat pump.
  • General ventilation system (optional) with air conditioning: €30,000 (approx. $33,000)
  • Additional KNX costs: €40,000 (approx. $44,000) extra compared to conventional electrical installations -> I will also start discussions on this promptly
Tolentino17 Aug 2022 09:10
Ground source heat drilling can vary widely in cost.
And I think with such a large building, ventilation with air conditioning might also end up being more expensive.
So it’s better to budget a bit more rather than having too little later.
Overall, I believe your estimate is reasonable. Even if some individual items might be slightly higher, others have already been priced quite high, so these should more or less balance out. Unless some unexpected event happens again at the building supply stores, which is certainly not unlikely if you look at the past three years.
N
Neubau2022
17 Aug 2022 09:18
aero2016 schrieb:

4000 is one third more than 3000.

He probably meant that 4,000 € is one quarter less than 3,000 € 😎