Verifiable sustainability
Sustainable buildings and infrastructure.
From DGNB/QNG certification and life cycle assessment in building construction to CO₂ accounting for transport infrastructure with InfraCarbon - planned, calculated and verified by engineers.
DGNB Auditor · Energy Efficiency Expert (dena) · DWA member
- Disciplines
- DGNB · QNG · LCA · Energy
- Sectors
- Buildings & infrastructure
- Experience
- more than 100 iSFP prepared
- Location
- Ratingen near Düsseldorf · since 2023
Services
Sustainability that stands up to verification.
- 01
DGNB & QNG Certification
New construction & refurbishment - from system consulting to certificate.
- System consulting & integration into the planning process
- Audit & verifiable documentation
- QNG requirements (German Sustainable Building Quality Seal)
- 02
Life Cycle Assessment (LCA) & CO₂ Strategies
Life cycle analysis and decarbonisation based on data.
- Life cycle analysis according to DIN EN 15978
- Embodied carbon & design option comparison
- Decarbonisation pathways
- 03
Energy Consulting
Residential & non-residential buildings - according to GEG / DIN 18599.
- Energy performance certificates & energy analysis
- Individual renovation roadmaps (iSFP)
- Funding support (BAFA / KfW)
References
Selected projects in buildings and infrastructure.

New multi-family building, Freising
85354 Freising · 10 residential units · New construction
DGNB auditor - end-to-end certification support
DGNB Gold (65.1 %) · QNG-PLUS · Efficiency House 40Details
Refurbishment of a multi-family building, Schmidmühlen
Schmidmühlen · 9 residential units · Refurbishment (ongoing)
DGNB/QNG certification support - from pre-check to certification
Target: DGNB Gold & QNG-PLUSDetails
New multi-family building, Cologne
Rochusstraße · 50827 Cologne · 23 residential units
Energy efficiency expert - specialist planning & verification
Efficiency House 40 (BEG) · NRW rental housing subsidyDetails
Flat roof refurbishment, Renault main branch, Cologne
Weißhausstraße · 50939 Cologne · approx. 5,801 m² roof area
Energy specialist planning & funding support
BAFA single measure · Proof of compliance § 92 GEGDetails
Individual Renovation Roadmaps (iSFP)
More than 100 subsidised individual renovation roadmaps for multi-family and residential buildings - condition analysis, prioritised measures and funding, presented all the way to the owners’ meeting.
Erkrath · Düsseldorf · further locations in North Rhine-Westphalia
InfraCarbon · Carbon accounting for civil works
InfraCarbon
Carbon footprints for civil works. Traceable to the source.
InfraCarbon calculates the carbon footprint of utility and road projects from a structured project model. Quantities, factors and sources stay traceable.
- Model the project
- Calculate
- Compare options
- Report
- Pipes, trenches, manholes and road build-up in one model
- Every factor with its source
- Up to three variants compared
- AI-assisted plan reading
- Resource passport and circular economy
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How we work
Structured from analysis to verification.
- 01
Analysis & data documentation
Consumption and building data, technical survey of systems and building envelope, documentation of the current condition.
- 02
Assessment basis
Energy indicators, CO₂ balance, economic feasibility calculations and technical inspection reports.
- 03
Prioritisation
Scenario comparison, CapEx/OpEx logic and a prioritised list of measures.
- 04
Implementation & verification
Quality assurance, verifiable documentation and setting up a monitoring structure.
Team
An interdisciplinary team for sustainable construction.

Gouzal Mozafari
Managing Director · M.Sc. Civil Engineer
DGNB AuditorESG ManagerBIM ManagerEnergy Efficiency Expert
Solmaz Samarehtajpour
Certification & Audit · M.Sc. Architect & Civil Engineer
DGNB AuditorEnergy Consultant (residential & non-residential)Building condition analyses
Behzad Moalem
Engineering & Site Management · M.Sc. Engineer
Technical site managementQuality assuranceImplementation coordination- Photo coming soon
Oktay Mozaffari
Digitalisation & Project Documentation · B.Sc. Electrical Engineering
Digital project documentationBIM/GIS data managementVerification processes
Let's talk about your project.
Whether DGNB/QNG certification, life cycle assessment or CO₂ accounting for your infrastructure - we will tell you what is feasible.
Your contact: Gouzal Mozafari, Managing Director · +49 157 5166 7182 · info@splusmengineering.de



