Your building audit · example
Sample Street 12, Berlin
Condominium owners’ association · 12 residential units + 1 commercial unit · built 1972 · 940 m² · gas boiler from 1994
- Lower energy costs
- Replace the heating
- Enable charging
- Use funding
At a glance
- Investment range
- €208k–332k before funding
- Funding
- €61k not verified, 23% of the midpoint
- Annual net effect
- €12,921 Savings + revenue − operation
- Payback
- 16.1 years 6.2% p.a. simple return
- CO₂ reduction
- 35 t/yr Indicative value
Measures and impact
| Measure | Investment | Funding | Impact per year | Assessment |
|---|---|---|---|---|
| Photovoltaics approx. 47.3 kWpEast-west roof, roofing renewed in 2015 | €52k–76k | – | €7,077 savings €1,730 feed-in | Potential identified |
| Heat pump approx. 80 kWGenerously sized radiators, flow temperature 62 °C | €144k–224k | €55.2k | €5,072 savings | Potential identified |
| 4 charging points with load managementPrepared for expansion to 10 charging points | €12k–32k | €6k | Charging offer for owners and tenants | Potential identified |
| Tenant electricity / building supplyClarify metering concept and operator | Revenue depends on the participation rate (assumed 50%) | Examine in detail | ||
| Building envelopeFaçade poor, roof and windows average | Values after heat load and U-value calculation | Examine in detail | ||
Your roadmap
- 20264 charging points with load managementResolution at the owners’ meeting
- 2027Photovoltaics and heat pumpPriority 1, funding application before awarding contracts
- 2027Set up tenant electricityPriority 2, after clarifying the metering concept
- 2028Envelope measure after specialist planningPriority 2
Impact for tenants
- Cost allocation
- €0.9/m² per month, after funding
- Energy cost relief
- €0.4/m² per month
- Balance of gross rent
- +€0.5/m² Tenants pay more net
Inconvenient results belong in the report too. Here it shows that the envelope and tenant electricity should be examined in more detail before the cost allocation is fixed.
Obligations and deadlines we keep an eye on for you
- Boilers older than 30 yearsCheck the replacement obligation under the GEG.
- Funding application before project startApply for grants before signing contracts.
- Grid operatorRegister the heat pump and wallboxes above 4.2 kW (Section 14a EnWG).
- Owners’ resolutionPrepare the resolution proposal and cost framework in good time.
Indicative survey of the building and its potential. Figures are ranges based on the stated assumptions. Funding amounts are unverified until approved by the funding body. No commitment regarding funding, taxes or loans. Technical approvals are given by the responsible specialist planners.