HELIASOL

What HELIASOL does

HELIASOL SAS is a privately held French consulting, engineering, and training firm specializing in building thermal performance, passive-building design, and eco-construction. Founded in 2007 and headquartered in Val d'Epy (Jura), the firm employs between 1 and 10 staff, including four named CEPH-certified practitioners — Marine Rouvier Janin, Franck Janin, Jean-Luc Delpont, and Nicolas Janin — and operates as a SAS with €12,000 share capital and no external investors. The company delivers a comprehensive service portfolio organized around passive-house design and certification (using PHPP), dynamic thermal simulation (STD via Pleiades/Comfie), French regulatory compliance (RT2012/RE2020), thermal-bridge optimization (MOLD 2D/3D), thermal-camera diagnostics (Testo and FLIR), energy choice studies, energy audits, electrical consumption analysis, solar mask surveys, and formal training programs.

Revenue is generated entirely through project-based professional-services engagements: multi-year, quote-based consulting contracts tailored to individual building projects. The firm's go-to-market is sales-led and direct, with no proprietary SaaS, software product, or API offering — technology deployment consists of industry-standard third-party engineering tools. The customer base spans four segments: individual homeowners (particuliers), property owners (maîtres d'ouvrage), architects and design firms (architectes, maîtres d'œuvre), and building managers / co-ownerships (gestionnaires, copropriétés). Geographic reach is concentrated in eastern and central-eastern France — principally Rhône-Alpes and Franche-Comté, with project extensions into Auvergne, PACA, and Languedoc-Roussillon.

Marketing and demand generation rely on trade-show participation (Passi'nergie, Passibat), industry-association membership (La Maison du Passif France as core, plus OIKOS, VAD, and Encore Bâtir), and published technical authorship — most recently "Le confort d'été dans l'habitat" (Terre Vivante, November 2024). Pricing is not publicly disclosed. The firm carries no patents, trademarks, awards, active regulatory actions, M&A activity, or external funding, and operates as a stable, founder-led micro-specialty consultancy rather than a scaling platform.

Name

HELIASOL

Legal name

HELIASOL SAS

Website

https://heliasol.fr

Company type

Private

Founded year

2007

Operating status

Operating

Headcount range

1–10 employees

Short description

HELIASOL is a French building-thermal engineering consultancy founded in 2007, delivering passive-house design, dynamic thermal simulation, RT2012/RE2020 compliance, thermal-bridge optimization, energy audits, and training to individual homeowners, property owners, architects, and building managers in eastern France.

Ownership category

akta.pro rank

Product category

Building Energy Consulting Services

NAICS

Environmental Consulting Services (54162), Management Consulting Services (54161), Management, Scientific, and Technical Consulting Services (5416)

SIC

Services-Engineering Services (8711)

akta.pro primary industry

MEP (Mechanical, Electrical & Plumbing) Engineering Consulting (BPAHAIAE)

akta.pro secondary industries

Operations & Process Improvement Consulting (BPAHACAB), Architecture, Planning & Surveying (AIA, Planning, Land Surveyor CE) (EDAAALAG)

Keywords

• Building thermal consulting
• Passive house design
• Energy efficiency consulting
• Thermal simulation services
• Eco-construction training

Headquarters

HQ city

Val-d'isere

HQ country

France

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B and B2C

Offering type

Services

Cost components

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

Revenue model

1. Consulting Services: Professional consulting services for building thermal optimization, including passive building calculations, energy audits, thermal bridge optimization, dynamic thermal simulations, and regulatory compliance calculations (RT2012/RE2020). Services are tailored to individual project needs.

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels3 records

Core offering

HELIASOL is a consulting and training firm specializing in building thermal performance, passive building design, and eco-construction. The company delivers passive building calculations using PHPP, dynamic thermal simulations, thermal bridge optimization with MOLD 3D, French regulatory compliance calculations (RT2012/RE2020), infrared thermographic inspections, energy audits, and professional training services. All consulting is delivered by CEPH-certified specialists serving individual homeowners, property owners, architects, and building managers across eastern France.

Product overview

HELIASOL is a consulting and engineering firm specializing in building thermal performance, offering a comprehensive suite of services for passive and eco-construction projects. Their portfolio centers on passive building design and certification (Calculs passifs, Obtention de labels PassivHaus), dynamic thermal simulations (STD), and French regulatory compliance (RT2012/RE2020 calculations). Complementary services include energy choice studies, thermal camera diagnostics, energy audits, heat loss calculations, thermal bridge optimization, electrical consumption analysis, solar mask surveys, custom consulting missions, and professional training. The firm serves individual homeowners, building owners, architects, and facility managers across the Rhône-Alpes and Franche-Comté regions, with all team members holding CEPH (European Passive Building Designer/Advisor) certification.

Differentiator

Problem solved

Functional benefit

Products and services

• Passive Building Calculations (Calculs passifs)

Quantifiable outcome

• Buildings certified to PassivHaus standard with heating needs below 15 kWh/m².year
• +1 more outcomes

Named customers4 records

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Partnerships

Four partnerships are on record, tiered core and minor.

• La Maison du Passif FrancecoreOthersProfessional association focused on passive building in France, providing networking, resources, and standards for passive construction professionals.
• OIKOSminorOthersEco-construction association promoting sustainable building practices and ecological materials.
• VAD - Ville et aménagement durableminorOthersAssociation for sustainable urban planning and development based in Lyon.
• Encore BâtirminorOthersProfessional network for sustainable construction professionals.

Scale indicators3 records

Recent moves5 records

Expansion highlights4 records

Broad incumbents

• Egis: Large French engineering group with a building energy and environment practice delivering thermal studies, RE2020 compliance, and energy audits as part of a broader infrastructure/transport/building portfolio. Comparable to HELIASOL through its building energy consulting offerings, though Egis also acts as a potential large competitor able to bundle thermal studies into wider project wins.
• Setec: French multi-disciplinary engineering firm providing technical consulting services including thermal engineering, energy performance, and sustainability consulting within a wider portfolio of buildings, infrastructure, and industry projects. Comparable to HELIASOL via overlap in building thermal engineering work, though as a much larger generalist.
• BG Ingénieurs Conseils: French and Swiss engineering consultancy focused on MEP and building energy, with a substantial practice in heating, ventilation, energy efficiency, and building physics consulting. Comparable to HELIASOL through MEP-style thermal and energy efficiency consulting, particularly in French-speaking markets.
• Ingerop: French engineering consultancy providing building energy, HVAC, and environmental studies including RE2020 compliance and thermal regulation advisory. Comparable to HELIASOL through engineering and energy consulting overlap, but at substantially larger scale with national/international footprint.
• Bureau Veritas: Global testing, inspection and certification group with a French building energy practice delivering energy audits, RE2020 verification, and HVAC/thermal performance services. Comparable to HELIASOL through overlap in energy compliance and building certification work, though as part of a much larger industrial TIC portfolio.
• SOCOTEC: Major French TIC firm offering energy audits, RE2020 thermal regulation verification, and building performance diagnostics across a national commercial network. Comparable to HELIASOL as a competing provider of building thermal compliance and certification services, though operating at much greater scale with broader scope beyond PassivHaus.

Direct peers

• Amoes: Strasbourg-based French consultancy focused on building energy efficiency and bioclimatic design. Comparable to HELIASOL through parallel offerings in dynamic thermal simulation, RE2020 compliance, energy studies, and PassivHaus-style passive construction advisory, serving architects and individual clients across eastern France.
• Inddigo: Independent French consultancy delivering energy audits, RE2020 thermal regulation studies, and sustainable building advisory to public and private clients. Comparable to HELIASOL because it operates in the same niche of building thermal consulting with focus on environmental performance for public-sector and private clients.
• Franck Boutté Consultants: Paris-based French consultancy specializing in building energy performance, bioclimatic design, and energy-efficient renovation. Directly comparable to HELIASOL because it serves a similar architect/owner client base with thermal simulation, RE2020 compliance, and PassivHaus-level optimization across France.
• Nobatek / INEF4: French R&D center and consultancy focused on sustainable building energy efficiency, with consulting services spanning thermal studies, dynamic simulations, and PassivHaus/BEPOS-level advisory. Closely comparable to HELIASOL as a specialist French eco-construction consultancy with overlapping RE2020 and passive-building practice areas.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat3 records

Key risks6 records

Key highlights6 records

Customer concentration

• Facebookfacebook.com/HELIASOL.fr
• LinkedInlinkedin.com/company/heliasol

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles4 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 HELIASOL