Estimate renovation costs in Olten

Local housing stock

In Olten, the federal building register lists 3'098 residential buildings and 11'063 dwellings. These municipal benchmarks help put your home in context, but do not replace an individual assessment.

82 %built before 1980

80 %heated by oil or gas

27.4 %electric hot water

6.2 %with declared solar thermal

Age of residential buildings

82 % built before 1980

Before 191926 %
1919–194535 %
1946–196013 %
1961–19705 %
1971–19803 %
1981–19907 %
1991–20003 %
2001–20102 %
Since 20117 %

Construction year does not reveal past renovations: check the current insulation condition.

Main heating energy

54 % · Gas

Gas54 %
Heating oil26 %
Heat pump15 %
District heating3 %
Electricity1 %
Wood1 %

This distribution describes recorded buildings, not your system's consumption or efficiency.

Heating and hot water: which energies?

Energy	Heating	Hot water
Gas	54 %	40.2 %
Heating oil	26 %	16 %
District heating	3 %	3 %
Heat pump	15 %	3.9 %
Electricity	1 %	27.4 %
Wood	1 %	0.3 %
Solar thermal	0 %	6.5 %

Each line gives the share of buildings using that energy, separately for heating and for hot water. The two columns do not always reach 100%: some buildings combine two systems, or reported none.

Type of heating system

Boiler (unspecified)79.3 %
Heat pump14.8 %
Heat exchanger (district)2.9 %
Condensing boiler1.3 %
Central electric heating0.9 %
Stove0.5 %

A standard non-condensing boiler is usually older and less efficient.

Houses or apartment buildings?

Single-family houses54 %
Two-dwelling houses9.1 %
Apartment buildings (3+)36.9 %
Other0 %

17 % of buildings mix housing with shops or offices.

The typical building

storeys (median): 3
median footprint: 101 m²
median dwelling area: 80 m²

Dwellings by number of rooms

7.7 %1 rm

14.9 %2 rm

34.8 %3 rm

27.7 %4 rm

14.9 %5+ rm

Dwellings per building

1 dwelling54 %
2 to 421.6 %
5 to 915.9 %
10 to 196.9 %
20 or more1.5 %

Renovations, heritage and volumes

For your renovation projects in Olten, official building register figures offer vital planning insights. Regarding heritage protection, one building out of 3098 is designated as protected, meaning you must contact the municipality early to secure necessary permits. Concerning building volume, for the 1672 recorded houses, the median volume measured according to the SIA 416 standard is 1063 m3, which is essential for scaling your heating and insulation upgrades. Please be aware that data coverage is partial for both building volume and renovation year, as a significant number of properties do not have these specific details documented.

1

buildings flagged as protected

status known for 14 of 3'098 buildings; check with the municipality

1'063 m³

median house volume (SIA 416)

measured for 1 of 1'672 houses

Source : OFS — RegBL (export communal complet). Existing residential buildings; percentages of recorded values.

Renovating in Olten: what to know

Planning works in Olten, canton of Solothurn? Before requesting quotes, local context helps: climate drives the value of insulation and heating, cantonal rules govern boiler replacement, and tax deductions can noticeably reduce the bill.

Renovation works in Olten