A French couple's decade‑old purchase of a water‑ and electricity‑free troglodyte second home highlights the niche market for rustic rural retreats and its sensitivity to tax and regulatory changes
Executive summary: Catherine and Gérard purchased a troglodyte (cave) house without running water or electricity ten years ago, using it as a secondary residence. The case underscores a niche but durable demand for heritage rural properties, which are exposed to changes in property taxation, energy‑renovation mandates, and rural development policy.
Who is involved: Catherine and Gérard (private buyers), French tax authorities, Ministry of Economy and Finance (budget 2027), local planning departments.
Likely next: The 2027 budget debate may introduce new tax regimes for second homes or tighten energy‑performance requirements, prompting owners of off‑grid properties to assess compliance costs or consider selling.
Le Figaro profiles Catherine and Gérard, who bought a cave dwelling in the French countryside ten years ago as a holiday refuge despite the lack of basic utilities. The story illustrates a small but persistent segment of the second‑home market that values heritage and isolation over modern comfort. Because such properties often sit on the margin of building‑code and energy‑efficiency rules, any shift in French fiscal policy — especially the upcoming 2027 budget — could materially affect their ownership costs and renovation incentives.
Timeline
- — «C’est très rustique, sans eau ni électricité, mais c’est notre refuge», Catherine et Gérard ont craqué il y a 10 ans pour une habitation troglodytique (Le Figaro — Économie)
Analysis — what this means
Likely next events
- Presentation of the 2027 French budget (expected autumn 2026) – may revise taxe d'habitation for secondary residences.
- Potential extension of MaPrimeRénov' subsidies to off‑grid heritage homes (decision by Q1 2027).
- Local prefecture review of building‑code exemptions for troglodyte dwellings (mid‑2027).
Sectors affected
- Residential real estate (second‑home market)
- Rural tourism and heritage property renovation
- Construction materials for off‑grid retrofits
Regulatory implications
- Possible increase in taxe foncière for non‑primary residences in the 2027 budget.
- Energy‑performance diagnostics (DPE) could become mandatory for all habitable dwellings, including cave homes.
Historical parallels
- 2015 Loi Pinel tax incentive boosted investment in rental property, showing how fiscal levers shift second‑home demand.
- 2019 reduction of taxe d'habitation for primary residences only, leaving secondary homes fully taxed.
Key entities
Sources
Open the full interactive case file on Beyond →