- 2025 Limit
- 1.5 kg CO₂e/m²/yr
- Mandatory since
- July 2025
- Save up to
- 12+ hours/project
- Starting from
- 199 DKK/project/mo
From invoice to emission report in minutes, not weeks.
A45 replaces manual spreadsheets with an intelligent platform purpose-built for BR18 A4 and A5 documentation. Upload your invoices, and let our AI do the rest.
AI-powered document analysis
Covers all of A4-A5: transport, site energy, and waste. Upload your documents – our AI navigates the BR18 regulations so you can focus on building.
BR18-compliant calculations
Automatic CO₂ calculations per BR18 Table 8, 10, and 11 with full traceability to the legislation.
Compliance & projections
Track your CO₂ usage continuously against the BR18 limit, and see projected emissions early so you can adjust before exceeding the threshold.
Method comparison
Compare calculation methods (measured, EPD, standard values) to find the most advantageous one.
Team collaboration
Invite consultants, subcontractors, and developers. Everyone contributes to the same documentation.
Professional reports
Generate PDF reports ready for regulatory submission with full documentation of all calculations.
One platform for complete A4 & A5 compliance.
From data collection to final report — manage every step of your A4 & A5 documentation for the execution phase in one place.
Toward a sustainable building industry.
The climate transition in construction isn't just about better materials — it's about better information. When every transport, every installation, every piece of equipment is documented and measured, we create the foundation for genuinely sustainable building practices.
A45 exists to make this documentation layer invisible. Not another burden for project managers, but a seamless part of how buildings are delivered. We believe that when compliance becomes effortless, the industry can focus on what matters: building better.
Founding Member benefits
As an early user, you get exclusive benefits during the launch period
Free onboarding session
30-minute video walkthrough of your first project
Direct feature influence
Your feedback shapes upcoming features
Priority support
Fast help during the launch period
Want to learn more? Book a no-obligation introduction and get a personal walkthrough.
Book an introductionFrequently asked questions about A4-A5 climate calculations
A4 covers transport of building materials and equipment to the construction site — including fuel consumption and distances. A5 covers energy consumption, waste handling, and soil transport at the construction site. Both phases require LCA documentation under BR18 §297-298 for buildings over 50 m² with building permits applied for after 1 July 2025.
A45 is purpose-built for BR18 A4-A5 documentation. The platform combines AI-powered invoice scanning with automatic calculations per BR18 Table 8, 10, and 11. Unlike general LCA tools, A45 covers the entire process from invoice upload to finished report — and supports all four A4 calculation methods plus A5 for machinery, energy, and waste.
The current limit is 1.5 kg CO₂e/m²/year for standard construction. The limit tightens to 1.3 kg CO₂e/m²/year in 2027 and 1.1 in 2029. For the low-emission class, the limit is already 1.1 kg CO₂e/m²/year. Documentation must be submitted with the completion notice — without it, an occupancy permit cannot be issued.
The building owner has the legal responsibility for delivering climate documentation at project completion, per BR18 §297-298. In practice, the task is often delegated to the advisor or general contractor, while subcontractors provide data for their respective contributions. A45 brings all parties together on one platform, so data flows directly from contractor to report.
A45 starts from 199 DKK/project/month with full access to AI scanning, BR18 calculations, and PDF reports. Every plan includes unlimited team access at no extra per-user fees. Try free for 14 days with no credit card required. See all plans on our pricing page.
Upload your invoices and delivery notes. Our AI automatically extracts relevant data — materials, weight, distances, fuel — and calculates CO₂ emissions per BR18 Table 8, 10, and 11. You review and approve, invite team members to contribute, and the platform generates BR18-compliant reports ready for authorities.