The GACS deadline passed on 1 January 2026. Your building either has a compliant system or an open obligation.
Since 1 January 2026, non-residential buildings in the Netherlands with heating or cooling systems above 290 kW must have a gebouwautomatisering- en controlesysteem (GACS). The owner is liable and the municipality enforces. Bisly delivers that system configured on site, on a budget a mid-sized building can approve.
GACS deadline for systems above 290 kW
housing corporations managing around 2.7 million dwellings
spent by those corporations on maintenance and sustainability in 2024
What the GACS rule asks a building to do
The system must continuously monitor, log, analyse and allow adjustment of energy use, benchmark the building against reference values, detect losses in efficiency and alert the responsible person, and communicate with connected technical systems from different manufacturers.
Owners of Dutch offices already know this pattern from the energy label C obligation that took effect on 1 January 2023. GACS follows the same logic: a dated requirement, an owner who is responsible for it, and a municipal enforcement route. Read the list above once more. It is a specification of a BMS written by the legislator.
Who is in scope
- Owners of non-residential buildings with heating, or combined heating and ventilation, above 290 kW effective rated output
- Owners of buildings with air-conditioning, or combined air-conditioning and ventilation, above 290 kW
- Offices, retail, schools, care buildings, logistics and mixed-use property, existing stock included
- From 2030, the same duty at 70 kW, which covers most buildings between roughly 1,000 and 15,000 m²
Configured, not programmed.
Bisly removes the engineering step from building automation. The design goes into a configurator, the installer follows the app on site, and the building comes up configured and documented. Same functions, same standards, a fraction of the specialist hours.
What that means for your building
Speed and certainty
The engineering hours come out of the project, so the price and the schedule stop moving. Fewer specialist hours, shorter commissioning, fewer return visits.
One system for the whole building
HVAC, lighting, shading, access and metering in one system, with third-party equipment integrated at gateway level. The same configuration repeats on the next site.
Compliant and measured on handover day
An EN ISO 52120-1 BMS with the continuous monitoring, logging and reporting the regulation asks for. The building meets its obligation when it opens, not in a retrofit three years later.
Why the Dutch market is ready for this
The Netherlands has the most organised building owners in Europe. 256 woningcorporaties control around 2.7 million dwellings and spent EUR 12.1 billion in 2024 on maintenance, improvement and sustainability. Commercial owners have already been through the label C regime and buy compliance as a programme, not a project.
That is exactly the buyer a deployment toolchain serves best: one configuration, defined once, repeated across a portfolio, commissioned by local installers without waiting for a programmer.
A GACS-class system your installer can commission
Bisly delivers an EN ISO 52120-1 BMS with the monitoring, logging, benchmarking and fault detection the GACS rule describes, in one system with HVAC, lighting, shading, access and metering. Third-party plant is integrated at gateway level, and we state exactly which integrations are covered before you sign.
The difference is in the hours. The design goes into a configurator, a Dutch installer follows the app on site, and the building comes up configured and documented. That is why the delivered cost lands where a mid-sized building can approve it, and why the handover date holds.
sites deployed across the Baltics, Poland and DACH
BMS functions in the base build, not as a later project
for HVAC, lighting, shading, access and metering
A phased path, starting with one building
You do not have to decide on a portfolio programme to discharge the obligation. Start with the building the deadline applies to.
- 01
Readiness assessment
We check what applies to your building, by which date, and what the system must be able to do. You get a written answer, not a brochure.
- 02
Metering and monitoring first
Continuous monitoring, logging, benchmarking and loss detection are the core of the requirement. A small decision that creates the measured baseline for everything after it.
- 03
Control where the numbers say it pays
Heating, ventilation, lighting and shading control are added building by building, configured on site by your installer rather than programmed by a specialist.
Find out where your building stands under GACS
A readiness assessment of one building: what applies, by when, and what the system must do. Written, with no obligation.
Other markets with a dated obligation
This page summarises national legislation for commercial orientation and is not legal advice. Thresholds, dates and exemptions should be confirmed against the official text and the competent authority for your building.