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Building of 3 apartments of 4.5 rooms, heating thermoreel

Building located at the entrance of Porrentruy
Heating of the town of Porrentruy "thermo-water"
1 housing per floor (3 x 4.5 rooms of 85 m2).
The price per square meter is low, ie Fr. 141.20. Rent Fr. 1'000 .--. Expenses are paid by the canton.
ECA volume 1620 m3.
The living space is currently 195 m2.
It is possible to create a fourth apartment in the attic of 70 m2, which will bring the living space to 255 m2.

The annual rental income is CHF 36,000 .-- .net
Selling price: Fr. 620,000 .--
Net return: 5.81%

Rental state projection after creating an additional slot:
Annual rental income: Fr. 46,800 .--

Cost for the development of additional accommodation: 70 m2 x Fr. 20000, - = Fr. 120'000 .--.

To be added to the sale price of CHF 620,000 .--: CHF 740,000 .--
Net return: 6.32%