ISB line for Gemeinschaftswohnungen with at least 4 Bewohnerplätze: betreute Wohngruppen under § 5 LWTG and Wohngemeinschaften for students, trainees, older people or people with disabilities. Any investor that builds and lets them cheaply can apply (eG, e.V., gGmbH, Stiftung, private owner); a self-organised senior WG or a Verein-run Pflege-WG fits, a mixed-age cohousing project does not.

  • Grunddarlehen per m² förderfähige Wohnfläche (max 50 m² per place incl. shared areas): €2,600 (Stufe 1–3) … €3,250 (Stufe 7) low-income; €1,850–2,250 for +60% households. Erweiterung/Umbau 90%, Umwandlung 50% of that.
  • Zusatzdarlehen: Individualwohnplatz €10,000 each; Pflegebad up to €20,000; standortbedingte Mehrkosten up to €16,000; Holz, Dämmstoffe, QNG, EH 40 (€250–350/m²); lifts €4,000 per place.
  • Interest 1% p.a. for the binding, then market; Tilgung ≥1%.
  • Tilgungszuschuss on the Grunddarlehen 30–45% (25/30-year binding, by Stufe) or 30–40% (+60% line, 20 years); 50% on Zusatzdarlehen.
  • Gates: Eigenleistung 15%; whole building barrier-free (DIN 18040-2); no sale during construction or in the first 2 years; rent caps €4.75–9.45/m² by Stufe and type; binding 20/25/30 years.
  • Apply directly at the ISB (forms on isb.rlp.de); tableau Stand 1.2025.
  • Combinability with KfW not addressed. Open question (not a fact): whether a cohousing group with a senior-WG cluster inside a larger project can fund only that cluster here and the rest via Programm 551 — the brochure allows mixing programmes per unit, but confirm with ISB.