Planwerk S Gmbh

What Planwerk S Gmbh does

Planwerk S GmbH is a German building-services engineering consultancy registered as a private limited company (GmbH, HRB 102805, Amtsgericht Darmstadt) and headquartered in Griesheim/Weiterstadt, Hesse. The firm delivers Analyse, Beratung, Planung and Projektsteuerung services across the full HOAI Leistungsphasen 1–8 lifecycle for HVAC (Heizung, Lüftung, Sanitär) systems in residential buildings, with particular depth in pipe renovation (Rohrsanierung), legionella prevention and remediation, hydraulic balancing, heat-load calculations under DIN EN 12831, and heat-pump feasibility analysis including subsidy/BAFA/KfW pathway evaluation. Its managing directors are Marcus Winter (Dipl.-Ing. Bauingenieurwesen) and Patrick Szaguhn, supported by a state-certified HVAC technician (Versorgungstechnik), a master craftsman, and a hybrid in-house/freelance engineering team.

The firm's commercial focus is the WEG (Wohnungseigentümergemeinschaft) and property-management segment, alongside housing cooperatives, private owners and municipal clients. Reference projects disclosed on the firm's materials range from roughly €64K to €1.587M, indicating a project mix that scales from single-building renovations to larger residential portfolios. Planwerk S maintains a multi-brand partner ecosystem (Viessmann, Helios, Geberit, Buderus, EFKL) that supports co-marketing and referral flow into WEGs and Hausverwaltungen.

Revenue mechanics follow standard German engineering-consultancy norms: fee-based engagements billed against HOAI Leistungsphasen, project-based work for renovations and compliance-driven mandates (notably EnSimiMaV hydraulic balancing mandatory since September 15, 2024), and incremental advisory work such as heat-pump feasibility. There is no public disclosure of revenue, headcount, customer concentration metrics or growth rates; no evidence of AI/ML tooling, no funding rounds, and no documented geographic expansion beyond the Hesse region.

Name

Planwerk S Gmbh

Legal name

Planwerk S GmbH

Website

https://planwerk-s.de

Company type

Private

Founded year

2021

Operating status

Operating

Headcount range

1–10 employees

Short description

Planwerk S GmbH is a German HVAC engineering consultancy in Griesheim/Weiterstadt, Hesse, delivering HOAI-compliant planning, analysis and project management for residential buildings. It serves homeowner associations, property managers, housing cooperatives, municipal clients and private owners.

Ownership category

akta.pro rank

Product category

Building Services Engineering

NAICS

Plumbing, Heating, and Air-Conditioning Contractors (238220)

akta.pro industry

PRIMARYIMAFALAB

HVAC & Refrigeration Contracting

Industrials, Manufacturing & Construction/Construction & Civil Engineering/Specialty Trade Contractors (MEP, HVAC, Plumbing, Electrical)

SECONDARYBPAJAHAM

Association Maintenance, Vendor & Capital Project Management

Business & Public Services/Real Estate Services (Brokerage, Property Management)/HOA/Condominium Association Management

Keywords

• HVAC engineering services
• Heating system planning
• Pipe renovation services
• Building services engineering
• Sanitary engineering consulting

Headquarters

HQ city

Weiterstadt

HQ country

Germany

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales, Technology or R&D, Others

Revenue model

1. Engineering & Planning Services (HOAI Leistungsphasen): Fee-based engineering services for HVAC systems spanning all eight Leistungsphasen per HOAI (German Architects and Engineers Fee Schedule), including analysis, consulting, design, cost calculation, tender preparation, and construction supervision. Revenue is project-based, driven by scope and complexity of the property.
2. Initial Consulting & Assessment Services: One-time advisory and diagnostic services including heat load calculations (ab 99,80€), hydraulic balancing assessments (ab 855€), camera inspections (ab 179€), feasibility studies, and heating system consulting. These serve as entry-point services to land larger planning mandates.
3. Project Management & Construction Supervision: Fee-based project steering (Projektsteuerung) covering cost management, quality control, and schedule management for building projects, supporting property owners and public clients through complex renovation and new-build HVAC projects.

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels4 records

Core offering

Planwerk S GmbH is a professional engineering and planning consultancy specializing in HVAC (heating, ventilation, and sanitary / Heizung, Lüftung, Sanitär) systems for residential and commercial properties. The firm delivers full-cycle engineering services across all eight HOAI Leistungsphasen, including analysis, consulting, design, cost calculation, tendering, and construction supervision, with specializations in pipe renovation (Rohrsanierung), legionella risk mitigation, hydraulic balancing, and energy-efficient heating system design. Services are provided to property owners, homeowner associations, property management firms, housing cooperatives, and municipal clients primarily in the Hesse region of Germany.

Product overview

Planwerk S GmbH is a planning and consulting firm specializing in heating, ventilation, and sanitation (HVAC/Sanitary) engineering services. The company operates a unified service model organized around four core service pillars: Analyse (Analysis), Beratung (Consultation), Planung (Planning), and Projektsteuerung (Project Management), supported by an Initialberatung module for initial needs assessment. These core services are complemented by specialized technical service modules including Heizlastberechnung (heat load calculation), Berechnung hydraulischer Abgleich (hydraulic alignment calculation), Heizung (heating services), Kamerabefahrung & Farbprüfung (camera inspection), Machbarkeitsprüfung (feasibility study), Sanitär (sanitary services), and Rohrsanierung (pipe rehabilitation). The company plans technical systems according to HOAI performance phases 1-8 for Anlagengruppen I, II, III covering heating, ventilation, and sanitation.

Differentiator

Problem solved

Functional benefit

Products and services

• Analyse (Building and Property Analysis) Evaluation of existing plant systems for economic, energy, and technical optimization opportunities, forming the diagnostic foundation for subsequent HVAC planning work. Targeted at property owners, homeowner associations, and property managers of residential and commercial buildings.
• Beratung (HVAC Consultation)
• Planung (HOAI HVAC Planning) Full-cycle technical planning of heating, ventilation, and sanitary systems (Anlagengruppen I, II, III) per German HOAI Leistungsphasen 1–8, including design, cost calculation, tendering, and construction supervision. Targeted at homeowner associations, property managers, housing cooperatives, and municipal clients.
• Projektsteuerung (Project Management) Cost, quality, and schedule management services supporting clients through realization of building projects within planned frameworks. Targeted at property owners, homeowner associations, and public-sector clients running complex renovation or new-build HVAC projects.
• Heizlastberechnung (Heat Load Calculation) Room-by-room heat load calculation per DIN EN 12831, starting at €99.80. A standalone technical service for sizing heating systems and supporting energy-efficient renovation planning.
• Hydraulischer Abgleich (Hydraulic Balancing) Hydraulic balancing calculation per EnSimiMaV requirements, mandatory for residential buildings with six or more units by 15 September 2024, starting at €855. Ensures uniform heat distribution and energy cost savings.
• Heizung (Heating System Consulting) Consulting on new heating system installation and option selection, starting at €990. Includes heat pump feasibility analysis and replacement guidance for outdated boilers.
• Kamerabefahrung & Farbprüfung (Camera Inspection & Color Testing) Pipe camera inspection combined with color dye testing to locate damage, blockages, or legionella breeding sites, starting at €179. A diagnostic entry-point service for pipe renovation projects.
• Rohrsanierung (Pipe Rehabilitation Planning) Planning service for drinking water pipe system rehabilitation in residential buildings, with special focus on occupied buildings to minimize resident disruption. Reference projects include a 96-unit building in occupied condition.
• Sanitär (Sanitary & Legionella Assessment) Water damage and legionella system assessment with short-term action catalogs for properties, including risk mitigation recommendations such as water temperature management (growth inhibition above 55°C, inactivation above 60°C).

Named customers3 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

One partnership is on record.

• EFKL (Energieeffizienz-Klasse)minorGTM or Marketing PartnerEFKL (Energieeffizienz-Klasse GmbH) is listed as a brand partner. Based on customer testimonial, EFKL collaborates with Planwerk S on complex engineering tasks and technical calculations for energy efficiency projects, referring clients to each other.

Scale indicators3 records

Recent moves5 records

Expansion highlights4 records

Direct peers

• ZWP Ingenieur-AG: German MEP/HVAC/sanitary engineering consultancy delivering HOAI-compliant planning across all Leistungsphasen for residential and commercial buildings. Closest comparable in terms of full-cycle HVAC engineering services, though materially larger in headcount and geographic footprint.
• Ingenieurgesellschaft Kofler + Kofler: German engineering consultancy focused on HVAC/sanitary planning for residential properties. Comparable niche specialization and reliance on HOAI-based fee structures for property owners and HOAs.
• Ingenieurgruppe B.A.U. German engineering group providing technical building services and energy planning. Similar consulting-driven, fee-based revenue model and overlap in residential and cooperative clientele.
• RBS Ingenieure: German MEP engineering firm providing HLS planning, energy concepts, and building simulation. Comparable HOAI Leistungsphasen service model with similar focus on residential renovation and energy-efficiency mandates.
• Ingenieurbüro Weinbrenner: Independent German HLS engineering office serving residential and small-commercial clients with HOAI-compliant planning. Closely matches Planwerk S in scale, service scope (heating, ventilation, sanitary), and customer segment.
• Duschl Ingenieure: Mid-sized German engineering consultancy specializing in technical building services (Heizung, Lüftung, Sanitär, Elektro). Directly comparable service portfolio and HOAI-based delivery model, with a broader geographic reach across southern Germany.
• b.i.g. gruppe (b.i.g. engineering): German engineering group providing technical building services planning including HLS for housing cooperatives and municipal clients. Overlapping customer base (Baugenossenschaften, kommunale Träger) and comparable HOAI delivery model.

Broad incumbents

• WSP in Deutschland: Global engineering consultancy with significant German MEP/HVAC practice. Provides the same HOAI Leistungsphasen planning services but as part of a much broader infrastructure and real-estate portfolio, often winning larger public-sector mandates.
• Buro Happold: International engineering consultancy with German presence covering MEP, energy, and sustainability. Operates broadly across building-services engineering rather than specializing in residential HLS planning like Planwerk S.

Others

• Viessmann: Listed brand-partner of Planwerk S and one of Germany's largest heating-system manufacturers. Comparable in that Viessmann shapes product specification in German residential heating projects; not a direct competitor but a key upstream ecosystem participant.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks5 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/planwerk-s-gmbh

Revenue estimate

Valuation estimate

Number of profiles

Profiles7 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Planwerk S Gmbh