Solaireau

What Solaireau does

Solaireau is a French maître d'œuvre (construction project management) firm founded in 2017 and based in La Haie-fouassière, Loire-Atlantique, specializing in bioclimatic wooden-frame construction, energy renovation, and full resource autonomy for residential and small collective housing projects. Its technical approach centers on wooden frame (ossature bois) structures with biosourced insulation (wood fiber, cellulose wadding, hemp, cottonwool), passive house principles, and integrated renewable energy systems including solar thermal, photovoltaic panels, pellet stoves, rainwater harvesting, phytoepuration wastewater treatment, and biodigestion for biogas. The company is structured as a SARL and is founder-owned by Guilain Méchineau, with a team of 1-10 employees serving clients across Loire-Atlantique (44), Maine-et-Loire (49), and Vendée (85).

The firm's service portfolio spans four main lines: new bioclimatic house construction, renovation and rehabilitation of existing buildings (including heritage properties and agricultural conversions), extensions and vertical elevations, and collective/social housing projects. Underpinning these are five autonomy sub-products covering heating, water, gas, food, and supplementary eco-solutions, allowing the firm to position projects along a spectrum from high energy performance to complete energy and resource independence. Notable technical outcomes cited include reducing energy consumption in renovated 1970s properties from 282 kWh/m²/year to 47 kWh/m²/year, achieving 14-hour thermal phase shift with wood fiber insulation versus 4 hours for glass wool, and covering approximately 75% of domestic hot water needs through solar thermal.

Solaireau operates a sales-led, relationship-driven B2C go-to-market targeting individual homeowners and select B2B clients (such as ICF Habitat and social housing developers), acquiring customers through its website (solaireau.fr), local search, open house events (portes ouvertes), and word-of-mouth referrals. Revenue is generated via professional service fees structured as a percentage of construction costs or fixed project management contracts; pricing is not publicly disclosed. Distribution is regional and direct, with no paid digital acquisition, no published pricing, and a partner ecosystem (FIBOIS, ÉCHOBAT, Biosfaire, Xylofutur, Homesmoz) supporting supply access and referrals.

Name

Solaireau

Legal name

SARL Solaireau

Website

https://solaireau.fr

Company type

Private

Founded year

2017

Operating status

Operating

Headcount range

1–10 employees

Short description

Solaireau is a project management firm that specializes in bioclimatic, autonomous, ecological, and hard construction.

Ownership category

akta.pro rank

Product category

Green Construction Project Management

NAICS

Residential Remodelers (236118), Commercial and Institutional Building Construction (23622)

SIC

General Bldg Contractors - Residential Bldgs (1520)

akta.pro primary industry

ADU Project Management & General Contracting (HSAPAMAO)

Keywords

• Bioclimatic construction
• Wooden frame houses
• Passive house renovation
• Eco-construction services
• Autonomous home design

Headquarters

HQ city

La Haie-fouassière

HQ country

France

HQ region

Europe

Offices1 record

Markets served

GTM type

B2C

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales, Supply Chain, Others

Revenue model

1. Maître d'œuvre Project Management Services: Solaireau acts as the prime contractor and project manager for construction and renovation projects, overseeing design, contractor coordination, budget management, and quality control from conception through delivery. Revenue is generated through professional service fees calculated as a percentage of construction costs or fixed project management contracts.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels3 records

Core offering

Solaireau operates as a maître d'œuvre (project manager/prime contractor) coordinating the design, contractor management, budget oversight, and delivery of bioclimatic wooden-frame construction and renovation projects. The firm delivers new home construction, renovation/rehabilitation, extensions/elevations, and collective housing projects, supplemented by autonomy solutions covering heating, water, gas, and food independence for residential clients in the Loire-Atlantique region.

Product overview

Solaireau operates as a maître d'œuvre (project management) firm offering comprehensive construction and renovation services for bioclimatic wooden houses in the Nantes region. Their core service is project management oversight for construction projects, supplemented by five specialized autonomy solutions (heating, water, gas, food, and other eco-tips) that enable clients to achieve energy and resource independence. The company delivers four main construction service lines: new house construction, renovation and rehabilitation, extensions and elevations, and collective housing projects, all incorporating eco-construction principles using biosourced materials and renewable energy systems.

Differentiator

Problem solved

Functional benefit

Products and services

• Maître d'œuvre Project Management Services Comprehensive project management services overseeing construction projects from initial design through final completion. Coordinates architects, artisans, and contractors to deliver bioclimatic wooden houses for individual homeowners and property developers.
• New House Construction (Maisons neuves) New bioclimatic house construction services for private homeowners, ranging from high energy performance to complete energy autonomy. Uses wooden frame structures and biosourced materials to deliver homes built on passive house principles.
• Renovation and Rehabilitation (Rénovations & réhabilitations) Renovation and rehabilitation services transforming existing buildings (including agricultural buildings like granges) into energy-efficient, healthy living spaces while preserving architectural heritage.
• Extension and Elevation (Extension et surélévation) House extension and vertical elevation services to add living space while maintaining coherence with existing structures, using wooden frame construction methods.
• Collective Housing (Habitats collectifs) Collective housing services including energy renovation of co-properties and social housing, new bioclimatic wooden-frame collective housing, and participatory housing project support for social housing organizations and developers.
• Autonomous House Design and Construction (Maison autonome) Autonomous house design and construction services achieving complete energy, water, and resource independence through integrated renewable systems for homeowners seeking full self-sufficiency.

Quantifiable outcome

• Energy consumption reduced from 282 kWh/m²/year to 47 kWh/m²/year in renovated 1970s properties
• +2 more outcomes

Named customers2 records

Segments4 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

Five partnerships are on record, tiered core and minor.

• FIBOIScoreStrategic or Co-development PartnerFIBOIS (formerly ATLANBOIS) is an interprofessional organization whose mission is to develop all uses of wood in construction and energy, and to promote renewal of the resource. Solaireau works with FIBOIS to source sustainable wood materials and promote wooden construction.
• ÉCHOBATcoreStrategic or Co-development PartnerÉCHOBAT brings together actors in eco-construction, insertion through economic activity, and training within its network. Partnership supports Solaireau's commitment to sustainable building practices and social responsibility.
• BiosfairecoreTechnology or IntegrationBiosfaire has been selecting biosourced construction materials that are respectful of occupant health and the environment for over 10 years. Preferred supplier for eco-responsible insulation and finishing materials.
• XylofuturminorStrategic or Co-development PartnerXylofutur is a Competitiveness Pole that has been evolving its professions, research themes, and spheres of influence for 15 years to closely match the economic and operational reality of its members. Provides access to innovation and research in wooden construction.
• HomesmozminorOthersHomesmoz offers rebalancing of living spaces to find habitat imbued with positive waves. A complementary bioenergy care service to regain autonomy and daily success.

Scale indicators1 record

Recent moves6 records

Expansion highlights5 records

Direct peers

• Natibois: French wooden-frame house builder delivering bespoke bioclimatic and energy-efficient homes across France. Directly comparable to Solaireau in product category (ossature bois construction), target customer (individual homeowners), and emphasis on energy performance.
• Ossabois: Major French wooden-frame construction specialist (part of VINCI Construction) delivering residential and collective housing projects. Comparable in core wooden-frame technology and bioclimatic orientation, though operating at significantly larger scale and broader geography than Solaireau.
• Maison Bois Massif: French wooden-frame and massif-bois house builder offering new construction and renovation services with emphasis on energy performance. Closely aligned with Solaireau's residential wooden-frame construction and bioclimatic positioning.
• Tom Pierre: French eco-construction firm specialized in healthy, bio-sourced homes including wooden frame, hempcrete, and natural insulation. Directly comparable to Solaireau's biosourced-material approach and bioclimatic design philosophy, though based in eastern France.
• POBI Habitat: French manufacturer-builder of wooden-frame homes and collective housing. Comparable in product (ossature bois construction), customer segments (individual and collective housing), and renewable-energy integration positioning.

Regional players

• Cabrol Constructions Bois: Southwestern French wooden-frame construction firm with renewable energy integration. Operates in a different region than Solaireau but is closely comparable in product offering (wooden-frame homes with energy systems) and project-management-plus-construction model.
• Maisons du Soleil: French wooden-frame house builder primarily active in southern France. Comparable in product category (wooden-frame bioclimatic homes) and target customer (individual homeowners seeking energy-efficient construction), though geographically distinct from Solaireau's western France focus.

Broad incumbents

• Bouygues Construction: One of France's largest general construction groups with capabilities spanning residential, commercial, and infrastructure projects. Relevant as a broad incumbent that includes eco-construction and renovation offerings within its portfolio, though not specializing in Solaireau's wooden-frame bioclimatic niche.
• Eiffage Construction: Major French construction group with residential and energy-renovation capabilities. Comparable as a broad incumbent operating across the same construction-and-renovation space, but at significantly larger scale and without Solaireau's niche specialization in bioclimatic wooden-frame autonomy homes.

Others

• Biosfaire: Curated French distributor of biosourced and healthy construction materials referenced as Solaireau's preferred materials supplier. Related not as a competitor but as a key ecosystem partner — comparable adjacency in the eco-construction supply chain that Solaireau depends on for materials.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat3 records

Key risks6 records

Key highlights6 records

Customer concentration

• Facebookfacebook.com/Solaireau
• LinkedInlinkedin.com/company/solaireau-maitrise-d-oeuvre

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

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 Solaireau