Consumption certificate: New choice for all residential buildings (draft building law)

Joost Jansky

Energieberater, Blogger

Note: This page follows the cabinet draft of the Building Modernisation Act (GModG) of 13 May 2026. Until promulgation, the German Building Energy Act (GEG) continues to apply unchanged; the Bundestag and Bundesrat still have to enact the proposal.

How to read this article: Start with today’s hurdle (Section 80 and WSchV77 evidence), continue with the proposed removal from the statute, then the tightened data regime under Section 82 — and finish with a decision aid geared to your building.

Today: Section 80 (3) GEG and the WSchV-1977 barrier

Selling, letting out, leasing or renewing matching contracts normally requires a valid energy certificate where none already exists (Section 80 (3) sentence 1 GEG). If the building application preceded 1977 and you operate fewer than five dwelling units, a special carve-out typically applies (below). Provided Section 82 is satisfied, you may ordinarily choose between a demand certificate and a consumption certificate.

For much of Germany’s residential stock today, Section 80 (3) sentence 2 GEG imposes another rule:

For residential buildings with fewer than five flats whose building application was filed before 1 November 1977, an energy demand certificate shall be issued.

A consumption certificate is available only where the dwelling already met — at completion — or was later upgraded to meet the insulation standard of the Thermal Insulation Ordinance of 11 August 1977 (Section 80 (3) sentence 3 GEG). Absent that proof — common for unmodernised estates with no archival evidence — the consumption pathway is barred.

Counter-intuitive though it feels, owners feel this personally: a five-unit multifamily dwelling with an application dated 1970 may opt for consumption; a four-unit terraced block from 1968 often may not, solely owing to the WSchV-1977 linkage, not the physical size ranking.

Rough estimates extrapolating from Census-based analyses (carried forward to 2020) put the combination under five dwellings and planning application prior to 1977 at roughly 8.5–9.9 million residential buildings — roughly half Germany’s dwelling stock (~19.6 million, dena Building Report 2024). How many presently cannot produce WSchV77 documentation is not recorded in administrative statistics; a two-digit-million share of the nationwide stock is realistically affected.

Important when interpreting your facts: application date differs from headline “year-of-construction” statistics (“pre-1978”). For marginal cases the filing date of the permit governs.

Who is affected?

Why proving WSchV77 compliance is difficult in practice

The ministerial notice detailing rules on consumption certificates lists three paths: legacy German Energy Saving Ordinance (EnEV) calculations, a mean λ-value following table 11, or component λ-values according to table 12. Without deed-room files or refurbishment evidence many owners stall — although metered consumption could, methodologically, fit their building.

The legislative intent was to block cases where inefficient fabric plus economical occupation paints a prettier picture than the demand-led route (dena handbook “Energy certificates” part 3). The regime targeted fair comparability of information, not a refurbishment mandate via the paperwork.

What changes in the GModG draft (Section 80 (3))

The watershed for residential dwellings sits in Section 80 (3) — not Section 82. Inside the published cabinet draft (Article 1 item 32, replacing Sections 80–83 GEG) the bespoke residential carve-out tethered to planning applications preceding November 1977 and the insulation ordinance disappears entirely. Mandatory trigger scenarios would allow certificate choice — between Section 81 balancing methodology or recorded consumption pursuant to Section 82 — provided consumption prerequisites are honoured.

For non-residential buildings, the draft in Section 80 (3) sentence 2 provides only for the certificate under Section 81; the consumption certificate is ruled out there for new issuances. That is a different issue from your detached or terraced residential home.

The GModG cabinet draft fact-check situates the whole reform package — building classes, heating, and non-residential rules.

What drops out of the statutory text

The explanatory memorandum skirts the carve-out verbally; juxtaposing statutes is the authoritative proof.

When does the new law apply?

Caveat: The certificate-focused portions of GEG revisions sit inside the cabinet draft PDF bundle under Article 1 and, per Article 9 (1), are slated to commence the day following promulgation — not six months later. Article 2 (GModG proper, including boiler rules) and Article 7 still wait six months post-promulgation. Do not confuse the Cabinet adoption on 13 May 2026 with law already rewritten.

Relaxing § 80 therefore widens issuance choice, while records discipline stays a discrete challenge.

Who benefits — and what does not change

Owners of detached homes and small multi-family houses (below five dwelling units) whose building application was filed before 1 November 1977 and who lack reliable WSchV77 proof stand to benefit most: the consumption certificate becomes legally selectable for the first time — but having it drawn up does not automatically become effortless.

With economical occupancy and an unretrofitted envelope, the consumption certificate often comes out cheaper on paper than the demand certificate. That may smooth sales and leases. Whether the route pays off still hinges on having consumption data, not solely on relaxing Section 80.

What does not change:

• Fabric minimums triggered by refurbishment (Sections 47 ff. GEG / draft parallels) — the Section 80 removal addresses certificate type, not renovation law.
• Trigger events prescribing a refreshed certificate (Section 80 (3) GEG).
• Data rigour: draft sharpens, not slackens Section 82.

Climate targets and "black sheep" — avoid a misconception

In technical materials, unsanitised small older buildings without WSchV77 proof are occasionally called “black sheep” — an energy certificate category, not a climate priority list. Many are thermally weak stock; the existing building stock is central to sector climate targets (around 60 % of dwellings predate 1978, dena Building Report 2024).

The new barrier: 24 months of monthly data under Section 82 (draft)

Deleting the WSchV77 anchor under Section 80 does not waive tightened consumption dossiers. Whoever insists on consumption must satisfy fresh Section 82 hurdles — noticeably harder two-year/monthly granularity keyed by carrier — compared with today’s typical triennial bundles. Dedicated guide: 24 months of monthly data and the consumption certificate examines methodologies, climatic adjustment, backlog questions; here merely the interplay with wiping the WSchV77 tie.

The irony is that the homes today held back by the WSchV77 hurdle often lack gapless monthly readings under the Heating Costs Ordinance (HeizkostenV):

• Owner-occupied detached home without tenants: the ordinance’s Section 1 governs allocating heating costs among users — without a landlord–tenant relationship it usually does not apply.
• Two-family house where the landlord occupies one unit: carve-out under Section 2 HeizkostenV.
• Apartment-level or decentralised heating: no central settlement for the whole building.

Legal choice and whether a consumption certificate can actually be issued are not the same thing.

Example: 1968 terraced house — before and after

This is not a judgment of how you heat. Certificates provide information for purchase, sale, and lease — which is why “the WSchV77 barrier goes” is not the same as “a consumption certificate is ready immediately.”

Preparing 24 months of monthly data without a billing service

Awaiting outsourced settlement reports is unnecessary: start logging distinct monthly carrier splits auditors can corroborate. Helpful artefacts sit in Documents you need when commissioning an energy certificate.

Smart meters — usually electricity, not your heating fuel

In everyday language, “smart meter” means the intelligent metering system (iMS) for electricity. A consumption certificate needs monthly figures by energy carrier — and in many unretrofitted older homes that is gas, heating oil, or pellets, not household electricity. An electricity iMS does not replace a gas or oil meter.

Where an electricity iMS actually helps

• Direct electric heating, night storage: The electricity meter is the heating carrier — digital logging pays off most here.
• Heat pump: What matters is electricity for heat generation (ideally a dedicated heat-pump meter or a clearly separable reading), not whole-house consumption alone.

From 1 January 2025, you can have an iMS installed upon request (MsbG § 30 (3) — price capped today at roughly EUR 60 incl. VAT/year in total). Obligations also arise, for example, with high electricity consumption, large PV installations, or steerable loads (Federal Network Agency metering hub; Consumer Advice Centre summary). Operators differ on historic 24‑month exports — query early enough. Lower cost: an optical read head on the modern measuring equipment (mME), where the interface is unlocked — often under EUR 100 hardware, without the grid operator’s annual iMS charge.

Gas, oil, and pellets — metering without an electricity smart meter

Gas (most common in older stock)

1. Free: Note the meter reading on the same calendar day each month (a photo of the display often suffices). Keep annual bills and any supplier customer portal exports — monthly granularity is inconsistent across providers and meter types.
2. Mid-range: If your gas meter has a pulse output, pulse adapters (smart-home or billing vendors) can log monthly values automatically — only where the meter type supports the interface (check before buying).
3. Let, central gas heating: Section 6a HeizkostenV has required monthly consumption information since 2022 where remotely readable; non-remote devices must be retrofitted by 31 December 2026 (Section 5 HeizkostenV).

Gas iMS via the electricity smart-meter gateway is planned in the rollout but still rare in existing buildings — do not assume your electricity meter already delivers gas readings.

Heating oil and pellets

• No grid at the tank: monthly fill level (dipstick, gauge) plus delivery notes and invoices.
• Optional: level sensor (roughly EUR 50–150 one-off) — worthwhile if you want ongoing digital logs.

Auxiliary electricity (circulation pump, controls) is usually minor or allocated with the main carrier; for the 24‑month series, gas/oil/pellets/heat-pump electricity matters most.

Manual logging still counts: A tidy spreadsheet or paper log with monthly readings and receipts is often the fastest, cheapest route; the issuer checks plausibility and completeness.

Where the Heating Costs Ordinance already helps

For owner-occupied single-family homes with per-floor or room heaters, the ordinance often does not apply (see the irony section above) — then supplier portals, pulse adapters, or your own readings remain the route. If you let the property with central heating, you can use the monthly information under Section 6a (see the gas section).

What you can do already

Decision aid: demand, consumption, or Smart certificate?

Even perfect spreadsheets can fail at handover to the auditor — acceptable format, plausible figures, missing receipts. Align expectations early, not on the day of inspection.

FAQ

My house is from 1968, never retrofitted — can I get a consumption certificate today?

As a rule, no. If the building application predates 1 November 1977, you operate fewer than five dwellings, and you lack persuasive documentation of WSchV-1977 performance, Section 80 (3) requires only a demand certificate today (Section 80 (3) GEG).

And after the GModG?

Legally, the consumption certificate becomes available once Article 1 of the cabinet draft PDF enters into force (anticipated the day after promulgation under Article 9 (1)). In practice, you must still satisfy the future Section 82 requirements — two full calendar years of consumption values, resolved monthly and split by energy carrier.

Is a consumption certificate worth it with an unretrofitted envelope?

Often yes. If you heat sparingly in practice — the consumption certificate captures your actual usage; the demand certificate foregrounds weak fabric. Running both makes sense ahead of selling or leasing; neither replaces refurbishment.

Does the repeal mean my building no longer matters for energy efficiency — or that climate targets have been achieved?

No. Legislative surgery targets certificate selection only. Renovation mandates and headline climate KPIs endure unchanged.

Conclusion

The GModG draft removes the WSchV-1977 barrier in Section 80 (3). For many owners of smaller older residential buildings, the consumption certificate would become lawfully selectable for the first time. Whether it is worthwhile depends on 24 months of consumption data and on how you occupy the building — not on insulation evidence alone. Data requirements remain high; whoever collects data early will have more flexibility once the rules take effect.

Wider dossier framing: GModG fact-check recap. Ahead of commissioning, reconcile datasets and certificate modality alongside your auditor — or seed defensible metering through Energieausweis Online.