ᐅ House Planning from Scratch – Financial Calculation, Basement...
Created on: 29 Jul 2017 23:32
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ArvavanHarben
Dear forum members,
I have spent most (actually the entire) evening reading and following the discussions here and am now very impressed by the level of expertise, knowledge, and experience gathered. Therefore, I would like to ask for advice (and hopefully contribute my own experiences in five years...).
We are currently starting from scratch with our house planning – almost:
1. Financial Planning
We have a budget of approximately 500,000 euros.
However, the plot of land (ideal location for us) will cost around 190,000 euros including purchase-related fees.
We have allocated 15,000 euros for furniture, kitchen, moving, a small buffer, etc.
Outdoor facilities/garden/garage are budgeted at 25,000 euros – although parts of this will not need to be implemented immediately; the only immediate requirement will likely be the cistern (from the development plan: “a cistern with a forced drainage and a specific volume of at least 25 liters per square meter (L/m²) of sealed surface area (projection – roof surface view) with subsequent infiltration via swales”), though I don’t really understand what this entails or costs. So there could be a buffer here as well.
Additional building-related incidental costs are currently estimated at 15,000 euros. This excludes the foundation slab, earthworks, basement, etc. (see below under 3.1).
This leaves about 255,000 euros remaining.
2. Our Plot
Our plot is about 1.3 meters (4.3 feet) below the current street level. It slopes gently (around 50 centimeters (20 inches) drop over 20 meters (66 feet)). Waterproofing of the basement against non-pressing groundwater is required.
3. Ideas/Concepts/Wishes
Our ideal house would be around 130-140 square meters (1,400-1,500 square feet):
In addition to living room/kitchen/toilet, a small combined office/guest room. Two children’s rooms, one bedroom, one bathroom. We would also like a utility room with space for household appliances and a place to dry laundry.
Additionally, we need storage space for garden tools/bicycles and ideally at least a small basement/storage room.
4. Questions
Aside from your general thoughts on our plans, here are some specific questions:
Regarding 1.: a) Is this financial plan realistic as a rough guideline? If not – we can hardly increase the budget – and the plot is not yet purchased, would it be better to look for a less favorable (and cheaper) location?
Regarding 3: b) Given the topography of the plot, we are considering whether to include a basement under part of the house or even develop living space there – how would the limited excavation affect that, considering that fill might be required? This would reduce otherwise usable living area. Would this be a reasonable cost saving?
Regarding 3: c) What is the best way to proceed with finding a house supplier? d) Should we simply contact various masonry house builders with this rough concept? Should I approach prefab house manufacturers in a prefab house center with these rough specifications and ask for proposals?
e) What is the general situation with prefab house manufacturers? From what I have read in the last four hours, some are described as “budget range,” others as “high quality,” etc. Can manufacturers roughly be grouped by quality – does the rule “the more expensive, the better the quality” generally apply? Is it possible to say that “X” is higher quality than “Y” but also more expensive? (And how is quality measured: wall thickness/insulation and materials used?)
Thank you in advance for your help – if it goes well, I will start a construction blog soon! Have a great rest of your Saturday/Sunday.
I have spent most (actually the entire) evening reading and following the discussions here and am now very impressed by the level of expertise, knowledge, and experience gathered. Therefore, I would like to ask for advice (and hopefully contribute my own experiences in five years...).
We are currently starting from scratch with our house planning – almost:
1. Financial Planning
We have a budget of approximately 500,000 euros.
However, the plot of land (ideal location for us) will cost around 190,000 euros including purchase-related fees.
We have allocated 15,000 euros for furniture, kitchen, moving, a small buffer, etc.
Outdoor facilities/garden/garage are budgeted at 25,000 euros – although parts of this will not need to be implemented immediately; the only immediate requirement will likely be the cistern (from the development plan: “a cistern with a forced drainage and a specific volume of at least 25 liters per square meter (L/m²) of sealed surface area (projection – roof surface view) with subsequent infiltration via swales”), though I don’t really understand what this entails or costs. So there could be a buffer here as well.
Additional building-related incidental costs are currently estimated at 15,000 euros. This excludes the foundation slab, earthworks, basement, etc. (see below under 3.1).
This leaves about 255,000 euros remaining.
2. Our Plot
Our plot is about 1.3 meters (4.3 feet) below the current street level. It slopes gently (around 50 centimeters (20 inches) drop over 20 meters (66 feet)). Waterproofing of the basement against non-pressing groundwater is required.
3. Ideas/Concepts/Wishes
Our ideal house would be around 130-140 square meters (1,400-1,500 square feet):
In addition to living room/kitchen/toilet, a small combined office/guest room. Two children’s rooms, one bedroom, one bathroom. We would also like a utility room with space for household appliances and a place to dry laundry.
Additionally, we need storage space for garden tools/bicycles and ideally at least a small basement/storage room.
4. Questions
Aside from your general thoughts on our plans, here are some specific questions:
Regarding 1.: a) Is this financial plan realistic as a rough guideline? If not – we can hardly increase the budget – and the plot is not yet purchased, would it be better to look for a less favorable (and cheaper) location?
Regarding 3: b) Given the topography of the plot, we are considering whether to include a basement under part of the house or even develop living space there – how would the limited excavation affect that, considering that fill might be required? This would reduce otherwise usable living area. Would this be a reasonable cost saving?
Regarding 3: c) What is the best way to proceed with finding a house supplier? d) Should we simply contact various masonry house builders with this rough concept? Should I approach prefab house manufacturers in a prefab house center with these rough specifications and ask for proposals?
e) What is the general situation with prefab house manufacturers? From what I have read in the last four hours, some are described as “budget range,” others as “high quality,” etc. Can manufacturers roughly be grouped by quality – does the rule “the more expensive, the better the quality” generally apply? Is it possible to say that “X” is higher quality than “Y” but also more expensive? (And how is quality measured: wall thickness/insulation and materials used?)
Thank you in advance for your help – if it goes well, I will start a construction blog soon! Have a great rest of your Saturday/Sunday.
Alex85 schrieb:
Yes, it is allowed to overflow. The text refers to a basin. "Forced drainage" into the basin, yes. Specifically to prevent it from "overflowing" (spilling out or backing up when the nominal fill level is reached).
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Caspar202031 Jul 2017 08:48ArvavanHarben schrieb:
Exterior facilities/garden/garage are budgeted at 25,000 EurosThat amount will be gone very quickly; you won’t even have time to say “B.” Especially since that also includes your infiltration system.
ArvavanHarben schrieb:
We have currently estimated additional ancillary construction costs at 15,000 EurosI see. And what about sewage, electricity, water, telecommunications, etc.?
ArvavanHarben schrieb:
Our plot is approximately 1.3m (4.3 ft) below the current street level. It slopes gently (about 50cm (20 inches) over 20m (66 feet)). Waterproofing of the basement against non-pressurized groundwater is requiredIs there a soil report? Or is the house supposed to be located below the street level?
I see a 30,000 to 40,000 Euros underestimation in your budget for a normal plot. With the -1.3m (4.3 ft) situation, add another 15,000 to 30,000 Euros on top.
Marvinius II31 Jul 2017 11:13I can only confirm what my predecessors have said. For our ongoing house project (145 m2 (1,560 sq ft) with a basement), we are currently just over 500,000, including good electrical fittings and tiles, and we only spent half of the amount you planned for the land... Due to the location and specifics of your plot (lower than the street level, cistern), you will probably have similar civil engineering costs as we do...
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Bau-Schmidt31 Jul 2017 16:34Caspar2020 schrieb:
Aha, and what about wastewater, electricity, water, telecommunications, etc.? Depending on the area, 5,000–10,000 € (euros).