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Aargau

Renovation works in Aarau

Local housing stock

In Aarau, the federal building register lists 3'585 residential buildings and 11'819 dwellings. These municipal benchmarks help put your home in context, but do not replace an individual assessment.

71 %built before 1980
63 %heated by oil or gas
44.2 %electric hot water
0.9 %with declared solar thermal

Age of residential buildings

71 % built before 1980

  • Before 191915 %
  • 1919–194526 %
  • 1946–196018 %
  • 1961–19706 %
  • 1971–19806 %
  • 1981–19907 %
  • 1991–20006 %
  • 2001–20106 %
  • Since 201110 %

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

Main heating energy

43 % · Gas

  • Gas43 %
  • Heat pump27 %
  • Heating oil20 %
  • District heating6 %
  • Electricity2 %
  • Wood2 %

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

Heating and hot water: which energies?

EnergyHeatingHot water
Gas43 %22.7 %
Heating oil20 %10.3 %
District heating6 %2.9 %
Heat pump27 %18 %
Electricity2 %44.2 %
Wood2 %0.9 %

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)63.8 %
  • Heat pump27.2 %
  • Heat exchanger (district)5.7 %
  • Central electric heating2.2 %
  • Condensing boiler0.5 %
  • Stove0.5 %

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

Houses or apartment buildings?

  • Single-family houses59.6 %
  • Two-dwelling houses9.7 %
  • Apartment buildings (3+)30.7 %
  • Other0 %

12.4 % of buildings mix housing with shops or offices.

The typical building

storeys (median)
2
median footprint
120 m²
median dwelling area
90 m²

Dwellings by number of rooms

7.5 %1 rm
14.5 %2 rm
28.7 %3 rm
27.8 %4 rm
21.5 %5+ rm

Dwellings per building

  • 1 dwelling59.6 %
  • 2 to 420 %
  • 5 to 913.7 %
  • 10 to 194.6 %
  • 20 or more2.1 %

Renovations, heritage and volumes

For your renovation plans in Aarau, federal building register figures are vital. With 467 buildings under heritage protection, it is crucial to contact the municipality early to address permit requirements. The median house volume is 800 m3, which serves as a key indicator for scaling insulation or heating upgrades. Please note that data coverage regarding volume is partial, as only 20 houses were measured according to the SIA 416 standard. We recommend verifying the precise dimensions of your specific property before starting any works to ensure your renovation budget remains accurate and effective for your project.

467
buildings flagged as protected
status known for 3'585 of 3'585 buildings; check with the municipality
800 m³
median house volume (SIA 416)
measured for 20 of 2'135 houses

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

Renovating in Aarau: what to know

Planning works in Aarau, canton of Aargau? 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.

Choose your works in Aarau

Nearby municipalities : Oftringen · Wohlen (AG) · Baden · Wettingen · Brugg · Zofingen · Spreitenbach · Rheinfelden