Energy Performance in Paris

Problem

Where to search in Paris to find an energy efficient property to rent?

Assumptions

  1. Paris has a decent amount of well rated properties.
  2. Some postal codes have a higher amount of energy efficient flats (say, rated from A to C).
  3. Flats located on the ground floor have a worst rating, as they as less well isolated.
  4. Some construction eras have most efficient ratings than others.

Data source

data.ademe.fr

There is a low amount of properties rated A, B or C.

Assumption #1 - incorrect ❌

At the time of writing 75020, 75013 and 75019 postal codes have a higher number of properties having been energy performance rated either A, B or C.

Assumption #2 - confirmed ✅

There seem to be proportionally less well rated properties on the ground floor than on other floors.

Assumption #3 - confirmed ✅

Properties built since 2001 offer 75% or more C ratings and a growing amount of B ratings. Properties built between 1975 and 1977 may have been maintained (or built?) better, explaining a high C ratings amount within the older range.

Assumption #4 - confirmed ✅

Conclusions

  1. ❌ Paris has few well rated properties,
  2. ✅ 75020, 75013 and 75019 are more efficient,
  3. ✅ Ground floor flats are actually less efficient,
  4. ✅ Recent constructions are usually more efficient.

Further analysis: Can we represent a corelation of assumptions #2 and #4 via a construction era breakdown per postal codes? This would re-enforce assumption #2 findings, if 75020, 75013 and 75019 postal codes have higher amount of properties built since 1982 and/or since 2001, compared to other postal codes.