ᐅ House Planning – Avoiding Mistakes in the Early Stages

Created on: 5 Nov 2020 12:24
X
Xelic95
Hello everyone,

I/we plan to start building in about 3-4 years, and I am already researching diligently. Better too early than too late. 🙂
I’m not sure if there is already a thread like this, but I couldn’t find anything with my search terms. If there is, please forgive me. Also, is this topic even in the right forum?

We already have a rough plan in mind for our future dream house. The design and layout are inspired by the "Modo Home MH5." May I post a floor plan of this house here for a rough overview?

The suitable plot of land is around 4000 sqm (43055 sq ft) and mostly flat (no typo) — the connection request is already in progress.
Brief keywords:
- Bungalow with a flat shed roof facing east → large windows facing south/west
- Double garage
- Covered large terrace
- Approximately 220 sqm (2368 sq ft) of living space
- No basement
- Large photovoltaic system + battery (our next car will very likely be a BEV. Smart charging with photovoltaic power)
- Controlled mechanical ventilation with heat recovery
- Possibly KNX control system + alarm
- No roof windows or roof structures (chimneys, satellite dishes, etc.)
- Budget for the house is about €400,000-500,000

Since we are still at the beginning of the planning phase and I am also researching materials (solid construction, timber frame, etc.), efficiency classes, heating methods (air/water or ground/water heat pump), I wanted to ask what you would have done differently right from the start or what should be taken care of early on.

I would find fundamental advice like “definitely don’t build solid because…” as helpful as small tips like “make sure to have a power outlet in area XY.”
My plan is to build the house as “finished” as possible, to avoid things later like high ongoing costs, early remodeling, or avoidable multiple power strips and cables.

So far, these are the things I have considered:
- Completely single-story and barrier-free (including showers, etc.)
- Wider doors (in case a wheelchair is needed someday)
- Wastewater heat recovery in the shower
- Centralized technology, e.g., ceiling speakers with a central amplifier, and devices like an AV receiver and computer/server will all be placed in the technology room
- Many LAN/fiber optic connections in rooms and the ceiling (for access points)
- Many power outlets with integrated USB-C ports
- All cables that can become outdated are installed in conduit pipes to allow easy replacement

As you can see, this list is still very tech-focused since we both work in IT. 🙂
I am currently reading up and gathering information in other areas as well.

This thread is also meant to highlight things other “home builders” might not have thought of yet.
If you have any questions, please feel free to ask.

Best regards
X
Xelic95
5 Nov 2020 14:46
But to clarify once again: I do NOT want to rebuild the MH5 exactly as it is!
The design/floor plan will only be used as a reference. It is mainly to illustrate that it will not be a city villa with a basement. I also will not be building with that company. This floor plan is by far the most appealing to me 🙂

- Bungalow
- Rectangular or square and symmetrical shapes
- No basement
- Lots of light, floor-to-ceiling windows
- Large terrace
- Single-story

But of course, there will be differences:
- Shed roof, not a flat roof
- Smaller
- 1-2 fewer rooms
- No unnecessary luxury features, such as that hole in the roof with a fireplace or the wooden cladding.
T
titoz
5 Nov 2020 14:49
pagoni2020 schrieb:

I don’t know much about this; which system would that be, for example, and what exactly are the advantages of THAT system?

I have a Nibe ventilation system integrated with my heat pump.
I can’t really say which other systems exist.
In the bathroom, guest bathroom, laundry room, and kitchen, air is extracted, and in every other room there is a fresh air vent in the wall that continuously allows air to flow in from outside.
Of course, this can be controlled. When it’s 40°C (104°F) in summer, I turn off or reduce the supply during the day, and then set it to 100% in the evening.

In two years, I haven’t once felt the need to open a window for ventilation when I came home from work in the evening.
In our house, the entire air volume is exchanged roughly every 4 hours... the warm exhaust air passes through a heat exchanger for energy recovery.
L
Lumpi_LE
5 Nov 2020 14:57
Xelic95 schrieb:

since no (load-bearing) ceiling, etc., is needed here, but a large slab foundation and a big roof are required.

However, that does not make it cheaper, but more expensive.
Is there a large bungalow on the neighboring property? Otherwise, there could be issues.
First, try to have a discussion with the building authority (building permit / planning permission office).
P
pagoni2020
5 Nov 2020 15:06
titoz schrieb:

I have a NIBE ventilation system connected to my heat pump.
I can’t really say what other systems are available.
In the bathroom, guest bathroom, laundry room, and kitchen, air is extracted, and in every other room, there is a fresh air vent in the wall through which outdoor air continuously flows in.
Of course, this can be adjusted. When it’s 40°C (104°F) in summer, I turn the intake off or reduce it to a minimum during the day, then set it to 100% in the evening.

In two years, I haven’t once felt the need to open a window when coming home in the evening.
For us, there is a complete air exchange roughly every 4 hours… the warm exhaust air passes through a heat exchanger for energy recovery.

…if I understand correctly, this is a decentralized mechanical ventilation with heat recovery system?
X
Xelic95
5 Nov 2020 15:16
@Lumpi_LE The plot on the left is empty, and there is a garden on the right. I will take a screenshot of the site plan. It is an edge plot in a rural area, with very loose development.
I have already scheduled an appointment with the building authority (planning department).
M
Mr.T2000
5 Nov 2020 15:35
Xelic95 schrieb:

The suitable plot of land is about a flat 4000 sqm (no typo) and is already secured --> connection to utilities is currently being arranged.
Brief key points:
- Bungalow with a flat shed roof facing east --> large window areas to the south/west
- Double garage
- large covered terrace
- about 220 sqm (2400 sq ft) living space
- no basement
- large photovoltaic system + battery (the next car will most likely be a BEV. Smart charging then with photovoltaic power)
- Mechanical ventilation with heat recovery
- Possible KNX control system + alarm
- No roof windows or roof structures (chimneys, satellite dishes, etc.)
- Budget for the house about 400,000-500,000€

- Have you roughly included the cost of utility connections in this already tight budget? What exactly has to be connected? These are enormous expenses!
- I would delete the garage immediately -> it costs significantly more than a double carport (consider electric doors, foundation, etc.) and I don’t see any major advantages -> you save around 20,000€.
- I find 220 sqm (2400 sq ft) of living space extremely large for 2 people. Consider: who will do the cleaning? Just the windows alone...
- As others have already pointed out, with this budget, the size and architectural demands are impossible. Consider cost increases over the next four years, building prices may rise by around +12% if you’re lucky! Depending on political factors!
- Sound system, smart home, multiple showers, everything barrier-free, covered terrace, photovoltaic & battery are initially pure luxury/gimmicks that will massively inflate the budget by at least +150,000€.