Energy consulting is state-subsidised in Germany – and at the same time one of the least transparently communicated. This article breaks down the typical costs in Düsseldorf and the surrounding area, explains the BAFA subsidy logic for 2026 and shows when an individual refurbishment roadmap (iSFP) makes economic sense.
What "energy consulting" actually means in subsidy terms
Eligible for funding under the guideline "Energy Consulting for Residential Buildings (EBW)" of the Federal Office for Economic Affairs and Export Control (BAFA) is the on-site consultation followed by a written report or an individual refurbishment roadmap (iSFP). The consultant must be listed in the federal Energy Efficiency Expert register (dena-EEE list). Advice from sellers of insulation, heating systems or solar panels is not eligible.
For my own model this means: I am not listed in the expert register myself. I provide the subsidised consultation in cooperation with listed energy efficiency experts — the on-site survey, assessment and quality control come from me as a chartered architect (AKNW), the formal report from the listed partner.
What the fee in Düsseldorf depends on
The fee for an iSFP consultation depends on building type and number of residential units – from single-family houses and semi-detached houses to multi-family buildings. A binding offer follows a short initial consultation. Since BAFA covers 50% of the eligible consulting costs (caps see below), the out-of-pocket share is well below the gross fee.
The fee varies with floor area, year of construction, complexity (extensions, bays, multiple heating circuits) and the completeness of as-built documentation. Owners who keep plans, energy performance certificate and heating cost statements in order save consultant time – and therefore fee.
BAFA subsidy 2026 in detail
BAFA funds residential energy consulting (EBW) at 50% of the eligible consulting fee — capped at 650 EUR for single- and two-family houses and 850 EUR for buildings with three or more dwelling units. The underlying EBW guideline expires on 31 December 2026; whether and how the programme continues in 2027 is currently open (as of August 2026). Anyone planning a subsidised consultation should apply before the end of the year. In detail:
- iSFP bonus: owners who implement a refurbishment step recommended in the iSFP within 15 years via the federal subsidy programme for efficient buildings (BEG-EM) receive an additional 5 percentage points of subsidy on building-envelope measures. Since 21 July 2026 the bonus only applies from an eligible investment volume of 30,000 EUR (one dwelling unit) and only to the amount above that threshold; heating replacement is excluded.
- Application process: applications are filed in the BAFA portal; eligible applicants are owners, homeowner associations, tenants and usufructuaries. Since April 2025 payment is made exclusively to the consulting recipient — direct payment to the energy consultant is no longer possible.
- Payment: typically 6 to 10 weeks after the report has been accepted.
What is included in the fee
A properly scoped iSFP consultation covers:
- On-site survey: two to four hours, envelope measurements, photo documentation, heating system data.
- Data analysis and energy balance: under DIN V 18599 (parts 1 to 11) or the simplified DIN 4108-6/4701-10 for purely residential buildings.
- Measure modelling: variants for envelope, plant technology and renewables.
- Refurbishment roadmap: written report in the prescribed iSFP structure, usually 30 to 60 pages.
- Walk-through meeting: one to two hours, normally at the client's home or via video conference.
- Application support: submission to BAFA, document checks.
Not included are follow-on services such as BEG-EM applications for individual measures, detailed component design, tendering and site supervision. These are billed separately under the German fee scale for architects and engineers (HOAI) or on a time or fixed-fee basis.
How to recognise a sound iSFP
The subsidy logic sets a price anchor: the capped grant makes low fees a selling point — and low fees limit the time available for survey and analysis. A report in the mandatory dena format can come largely from software. Whether a real building survey sits behind it is settled by five questions before commissioning:
- How many hours does the consultant spend on site — and do they look at the roof and the basement?
- Is every building component recorded and assessed individually, or estimated from a construction-year catalogue?
- Is actual consumption data from recent years reconciled with the demand calculation?
- Does the roadmap name non-energy issues (moisture, service lines, roof condition) that would change the sequence?
- Is the report explained in a conversation — or does it arrive as a PDF by e-mail?
A thorough consultant answers all five without hesitation.
Realistic timeline
| Phase | Duration |
|---|---|
| Initial meeting and engagement clarification | 1 week |
| Scheduling the on-site appointment | 1–2 weeks |
| Energy balance and measure modelling | 2–3 weeks |
| Report preparation and handover | 1–2 weeks |
| BAFA application and payment | 6–10 weeks |
| Total from enquiry to payment | 11–18 weeks |
Anyone planning short-term refurbishment work should allow lead time accordingly. The iSFP remains valid for bonus purposes for 15 years after payment.
When an iSFP makes economic sense
The own share remaining after the BAFA subsidy is manageable — it says nothing about the depth of the report (see the five questions above). The economically decisive factor is the follow-on effect:
- 5% iSFP bonus on BEG-EM measures. On a 40,000 EUR insulation measure, since 21 July 2026 that is 500 EUR of additional subsidy (5% on the 10,000 EUR above the minimum volume); heating replacement does not qualify for the bonus.
- Sequencing certainty: anyone refurbishing in the wrong order (e.g. heating before insulation) pays twice or three times: oversized heating system, later renewed hydraulic balancing.
- Negotiating basis with banks and subsidy institutions.
For smaller measures (one-off window replacement, stand-alone solar thermal) the iSFP effort is often too high. A pure energy consultation without a roadmap is sufficient – also BAFA-eligible.
Special case Düsseldorf: local programmes
The municipal programme "Klimafreundliches Wohnen und Arbeiten in Düsseldorf" (grants for photovoltaics, storage and greening, among others) has been provisionally suspended since January 2026 and is being revised; new applications are currently not possible, while grants already approved remain valid (as of August 2026). Precisely because municipal programmes change constantly, the current subsidy landscape belongs in every consultation.
Bottom line
The BAFA grant lowers the cost of an energy consultation, but it is no substitute for a quality check: 50 percent funding, yet capped at 650 EUR — from a fee of 1,300 EUR upwards the owner carries every further euro alone, and a low price buys little analysis time. The five questions above separate a sound report from a software product. The iSFP itself is an energy concept with subsidy access — not investment planning for the whole house. The foundation of any reliable consultation remains the building survey: only those who know the actual condition of the building can estimate the costs and risks of refurbishment sensibly.
Related articles:
- Is an Energy Audit Enough? Why Existing Buildings Need More Than an iSFP
- iSFP 2026: Refurbishment Roadmap, BAFA Subsidy and Bonus
- GEG 2024/2026: Refurbishment Obligations and Exceptions for Existing-Building Owners
Next step: Direct enquiry for energy consulting and iSFP with a free initial discussion.
Next step
Would you like this topic assessed for your property in concrete terms? I offer a free initial consultation — fee ranges, scope and available subsidies discussed openly.