ᐅ Cost Estimation and Planning, Your Opinion

Created on: 8 Apr 2019 17:53
G
Georgie
Hello everyone.
My wife (41) and I (47) want to build a house.

Region:
Kaiserslautern district (20km (12 miles)), Rhineland-Palatinate

House:
Solid bungalow, approx. 125sqm (1350 sq ft) with partial basement (including garage), underfloor heating, air source heat pump with controlled ventilation.
Simple design. Turnkey.

Plot:
800sqm (8600 sq ft), on a south-facing slope, road runs parallel to the slope.
Slope: approx. 19% gradient. Over 35m (115 ft), it drops 7m (23 ft) to the south.
Plot is already owned and paid for (30,000). Soil survey is available.

Infrastructure:
Gap site, supply and disposal lines run in the street next to the property boundary (approx. 2-5m (7-16 ft)).

Development plan:
Gap site, no formal development plan. Preliminary building inquiry resulted in: development according to §34.
"Development is permitted if it fits in with the type and extent of existing buildings, the construction method, and the developed area of the neighboring properties."

Finances:
Joint monthly net income: 4000.-
Children: 1, already 17 years old (no more planned).
Equity: 50,000.- available, another 100,000.- locked in until the end of 2021, building plot (see above)

We currently live rent-free in our own three-family house in the city.
Rental income: Ground floor: none (my mother lives there), 1st floor: 600.- net rent, 2nd floor: we live there ourselves (will be rented out upon moving. approx. 650.- net rent).

Joint monthly expenses (total): approx. 2900.-
So monthly savings are 1100.- plus rental income as above.

Therefore, approx. 1100.- plus rental income is available for financing.

We have made a rough cost estimate so far.
Please correct any possible miscalculations on my part!
Plot costs including incidental costs: 30,000.- (already paid)
House costs (bungalow): 125sqm (1350 sq ft) * 2000.- = 250,000.-
Partial basement with integrated double garage: 50,000.-
Additional building costs: 80,000.-
Outdoor facilities: 20,000.-
Buffer: 20,000.-
Total budget approx. 450,000.- gross
Is this realistic?

Attached you will find a cadastral map and a rough idea of the exterior view from the street.
(The current slope is shown in green.)
I am open to any suggestions. Thank you.

Katasterkarte mit markierter Parzelle; kleines Rechteck mit zwei horizontalen Linien in der Mitte.


Grundriss: Haus mit Bungalow, Keller mit Garage, Terasse; grüne Geländekurve verläuft.
G
Georgie
15 Jul 2019 20:14
So, I have now reconsidered matte1987’s ideas and incorporated some of them.
I would appreciate it if the experts could take a look and possibly identify any shortcomings.

Grundriss eines Hauses mit Kochen/Essen, Diele, Bad/WC, Kind/Gast, Garage auf zwei Ebenen.


Grundriss: Luftraum, Wohnen Ebene 2, Schlafen Ebene 2, WC Ebene 2.


Isometrische 3D-Ansicht eines Hausgrundrisses mit Küche, Essecke, Wohnzimmer, Treppe, Bad, Terrasse.