B. HOUSSAIS Architecture
B. HOUSSAIS Architecture is a Brittany-based architectural practice specializing in eco-construction using timber frame, straw bale, raw earth, and biosourced materials, serving private individuals, private businesses, and public-sector clients across Côtes d'Armor with full design, permit, and supervision services.
- Company typePrivate
- Founded2017
- HeadquartersLa Roche-Derrien, France
- Headcount1–10
- GTM typeB2B and B2C
- OfferingServices
What B. HOUSSAIS Architecture does
B. HOUSSAIS Architecture is a private architecture practice founded in 2017 by Blandine Houssais de Wazières and headquartered in La Roche-Derrien, Côtes d'Armor, Brittany, France. The firm operates from a single office at Keravel, constructed by the agency itself in timber frame, and is staffed by approximately five professionals (four architects and one administrative staff member as of 2018). It specializes in contemporary eco-architecture, with deep technical expertise in biosourced construction methods including timber frame (ossature bois), straw bale insulation, raw earth finishes, lime hemp, Douglas/larch cladding, and zinc standing seam roofing, and holds PROPAILLE certification. Projects span passive and energy-positive buildings, with documented examples such as the Maison Médicale d'Yffiniac (BIOSOURCE Award 2025) and the straw-earth-timber house selected for the MATERIA Award 2025 international finalists.
The firm's service portfolio covers full architectural commissions — design, permit applications, and construction supervision — across three primary client segments: private individuals (new-build timber frame houses, passive houses, renovations, extensions), private-sector businesses (restaurants, offices, agricultural and industrial buildings, retail, senior residences), and public-sector bodies (colleges, schools, multipurpose halls, social housing, multidisciplinary health centres, and cultural venues) accessed via public architectural competitions and direct appointments. It also delivers dedicated feasibility and programming studies for health facilities (maisons de santé, EHPADs) and provides architectural advisory services to multiple communes where the principal serves as Architecte Conseil. Revenue is generated exclusively through professional service fees quoted on a per-project basis; no public price list exists and no revenue figures are disclosed.
The firm operates a relationship-driven, community-led go-to-market model anchored on word-of-mouth, professional referrals, commune advisory roles, and recurring participation in regional architecture biennales (Trégor, Perros-Guirec) and open-house events. It is an active member of MAeB (Maison de l'Architecture et des espaces de Bretagne), FIBOIS Bretagne, and joined the ECHOBAT eco-construction network in March 2026. Geographic scope is concentrated in Brittany, primarily Côtes d'Armor, with brand visibility extending nationally and internationally through trade press features (Le Moniteur, Archdaily, Ouest France, SequencesBois, Habitat Naturel) and award recognition.
B. HOUSSAIS Architecture firmographics
Firmographics- Name
- B. HOUSSAIS Architecture
- Legal name
- B.Houssais Architecture
- Website
- https://bhoussaisarchitecture.com
- Company type
- Private
- Founded year
- 2017
- Operating status
- Operating
- Headcount range
- 1–10 employees
- Short description
- B. HOUSSAIS Architecture is a Brittany-based architectural practice specializing in eco-construction using timber frame, straw bale, raw earth, and biosourced materials, serving private individuals, private businesses, and public-sector clients across Côtes d'Armor with full design, permit, and supervision services.
- Ownership category
- akta.pro rank
B. HOUSSAIS Architecture industry classification
Industry- Product category
- Architecture Services
- NAICS
- Architectural Services (54131), Residential Building Construction (23611)
- SIC
- General Bldg Contractors - Residential Bldgs (1520)
- akta.pro primary industry
- Architectural Design Services (BPAHAKAA)
Keywords
Where B. HOUSSAIS Architecture is headquartered
LocationHeadquarters
- HQ city
- La Roche-Derrien
- HQ country
- France
- HQ region
- Europe
Offices1 record
Markets served
B. HOUSSAIS Architecture business model
Business model- GTM type
- B2B and B2C
- Offering type
- Services
- Cost components
- Personnel, Operations, Marketing or Sales
Revenue model
- Architecture and Design Services: Full-service architectural commissions covering design, permit applications, and construction supervision for private individuals, professionals, and public bodies. Revenue is generated through professional fees on a per-project basis.
- Architectural Competitions: Winning public architecture competitions (e.g., Maison Médicale Yffiniac, Collège du Penker, Halle de Troguery) which generate project mandates from public clients.
- Feasibility and Programming Studies: Dedicated studies of feasibility and programming for health-related programmes including multidisciplinary health centres (maisons de santé) and EHPADs.
- Architectural Advisory Services: Blandine Houssais serves as Architectural Advisor to multiple communes, providing advisory services to local municipalities on architectural and planning matters.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Other | Multi-year contract | Private Individual Projects |
| Other | Multi-year contract | Professional/Private Sector Projects |
| Other | Multi-year contract | Public Commission Projects |
Go-to-market motion3 records
Distribution channels3 records
Marketing channels6 records
B. HOUSSAIS Architecture product offering
Product offeringCore offering
B. HOUSSAIS Architecture is a Brittany-based architectural design practice that delivers residential, commercial, agricultural, and public-sector building projects with a specialisation in eco-construction using timber frame, straw bale, raw earth, lime hemp, and other biosourced materials. Services span architectural design, permit applications, construction supervision, feasibility and programming studies (notably for healthcare facilities), and ongoing advisory work for municipalities, with PROPAILLE-certified expertise in straw-bale and earth-based construction.
Product overview
B. Houssais Architecture is an architecture firm offering comprehensive architectural design services for residential, professional, and public projects. The firm specializes in eco-construction using natural materials such as wood, straw, and earth. Services include residential architecture (new wooden houses, passive houses, renovations), professional architecture (offices, restaurants, commercial spaces), public architecture (schools, community facilities, healthcare centers), and feasibility studies for health facilities. The firm holds PROPAILLE certification for eco-construction projects and is a member of MAeB (Maison de l'Architecture et des espaces de Bretagne). The practice operates from La Roche-Derrien in Brittany, France, serving clients across the Côtes d'Armor region.
Differentiator
Problem solved
Functional benefit
Products and services
- Architectural Design Services
- Residential Architecture
- Professional and Commercial Architecture
- Public and Government Architecture
- Feasibility and Programming Studies
- PROPAILLE-Certified Eco-Construction Projects
- Architectural Advisory Services (Architecte Conseil)
Quantifiable outcome
- Maison Médicale d'Yffiniac: energy-positive building using biosourced materials and raw earth
- +3 more outcomes
Companies that use B. HOUSSAIS Architecture
Customer profileNamed customers12 records
Segments4 records
Ideal customer profiles3 records
B. HOUSSAIS Architecture technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature4 records
B. HOUSSAIS Architecture partnerships and signals
Strategic signalPartnerships
Seven partnerships are on record, tiered core and minor.
- ECHOBAT NetworkcoreIn 2026, the agency joined ECHOBAT, a network uniting designers, companies, engineering firms, and manufacturers all animated by a shared commitment to promoting solidarity-based eco-construction. The network facilitates knowledge exchange and collaborative project development in sustainable building.
- MAeB (Maison de l'Architecture et des espaces de Bretagne)coreBlandine Houssais is an active member of MAeB Trégor. The agency participates in and helps organise the Biennale d'Architecture du Trégor and other professional community events through this membership.
- FIBOIS BretagnecoreActive relationship with FIBOIS Bretagne through multiple award submissions. The agency has won or been shortlisted for three FIBOIS trophies (2022, 2023, 2025) and participates in FIBOIS events and site visits, aligning with the federation's biosourced materials mission.
- Fédération Bretonne des Filières Biosourcées (FB2)minorThe agency participated in a FB2-organised site visit to the Maison de Santé d'Yffiniac, collaborating with FIBOIS Bretagne, Collectif Paille Armoricain, Collectif des Terreux Armoricains, and ECIMA.
- Collectif Paille ArmoricainminorProfessional network of straw-construction practitioners in the Armorican region, collaborating on technical knowledge and best practices for straw-bale building.
- Collectif des Terreux ArmoricainsminorCollective of raw earth construction practitioners in Brittany, sharing expertise and promoting earth-based building techniques in the region.
- NUNC Architecture Agency (St Brieuc)minorCo-realisation of the Bourg de Tréveneuc urban restructuring project with NUNC architecture agency from St Brieuc, which received a Special Jury Mention at the PAB 2018 awards.
Scale indicators3 records
Recent moves6 records
Expansion highlights4 records
B. HOUSSAIS Architecture competitors and assessment
Company assessmentBroad incumbents
- TETRARC: Established French architecture practice with strong credentials in timber-frame and biosourced construction, similar to B. Houssais's eco-construction specialism. Operates at a larger scale and broader geographic footprint, serving as a broader incumbent in the eco-architecture space.
- Wilmotte & Associés: Major French architecture firm with broad portfolio including cultural, educational, and public projects. Serves as a broader incumbent in the French architecture market, though not specialising in biosourced materials like B. Houssais.
- Architecture-Studio: Internationally-recognised French architecture firm with extensive portfolio in cultural, public, and educational buildings. Overlaps with B. Houssais's public sector typologies but operates at significantly larger scale and global footprint.
- Atelier Zündel Cristea: Paris-based architecture firm with strong portfolio in sustainable design, educational facilities, and biosourced materials. Comparable philosophy around environmental responsibility but with larger project scale and broader geographic reach.
Direct peers
- Enia Architectes: French architecture practice focused on eco-construction and timber-frame buildings, including passive houses and biosourced material projects. Comparable specialism in environmental construction and a similar practice profile in the French regional market.
- NUNC Architecture: St Brieuc-based architecture firm that co-realised the Bourg de Tréveneuc project with B. Houssais Architecture (winner of PAB 2018 Special Jury Mention). Operates in the same Brittany region with comparable public-sector and residential focus, making it a natural direct peer.
- Lemoal Lemoal Architectes: French architecture firm with a strong portfolio in public cultural and educational facilities, often using timber and biosourced materials. Comparable in scale and project typology (public commissions, community facilities) to B. Houssais's portfolio.
- R2K Architecte: French architecture firm specializing in eco-construction, timber frame, and biosourced materials. Similar small-scale practice profile with public and private sector work in regional France.
Emerging players
- Studio Mustard: French architecture firm focused on sustainable and low-carbon design, sharing similar eco-construction values. Comparable scale and emerging status in the French biosourced architecture market.
- TECTA Architecture: French architecture practice with overlap in residential and small public projects, particularly in the Brittany region. Emerging player with comparable typology focus but less established eco-construction specialism.
Market position
Strengths4 records
Weaknesses4 records
Competitive moat4 records
Key risks5 records
Key highlights6 records
Customer concentration
B. HOUSSAIS Architecture social profiles
Digital presenceB. HOUSSAIS Architecture compliance and trust
Trust signalCompliance1 record
B. HOUSSAIS Architecture financial estimates
Financial estimateRevenue estimate
Valuation estimate
B. HOUSSAIS Architecture leadership team
Management profileNumber of profiles
Profiles2 records
B. HOUSSAIS Architecture funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
B. HOUSSAIS Architecture M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about B. HOUSSAIS Architecture
What does B. HOUSSAIS Architecture do?
B. HOUSSAIS Architecture is a Brittany-based architectural design practice that delivers residential, commercial, agricultural, and public-sector building projects with a specialisation in eco-construction using timber frame, straw bale, raw earth, lime hemp, and other biosourced materials. Services span architectural design, permit applications, construction supervision, feasibility and programming studies (notably for healthcare facilities), and ongoing advisory work for municipalities, with PROPAILLE-certified expertise in straw-bale and earth-based construction.
Is B. HOUSSAIS Architecture a public or private company?
B. HOUSSAIS Architecture is a private company. It is classified as founder individual operated bootstrapped and is currently operating.
When was B. HOUSSAIS Architecture founded?
B. HOUSSAIS Architecture was founded in 2017. It employs 1 to 10 people.
Where is B. HOUSSAIS Architecture based?
B. HOUSSAIS Architecture is headquartered in La Roche-Derrien, France, in the Europe region.
How does B. HOUSSAIS Architecture make money?
Four revenue lines are on record. Architecture and Design Services are the primary driver. The others are architectural Competitions, feasibility and Programming Studies and architectural Advisory Services.
Who are B. HOUSSAIS Architecture's main competitors?
Broad incumbents on record are TETRARC, Wilmotte & Associés, Architecture-Studio and Atelier Zündel Cristea. Direct peers are Enia Architectes, NUNC Architecture, Lemoal Lemoal Architectes and R2K Architecte. Emerging players are Studio Mustard and TECTA Architecture.
Does B. HOUSSAIS Architecture have an API?
No public API is recorded for B. HOUSSAIS Architecture.
What industry is B. HOUSSAIS Architecture in?
B. HOUSSAIS Architecture's product category is Architecture Services. Its primary akta.pro industry code is BPAHAKAA, Architectural Design Services. Its NAICS code is 54131 and its SIC code is 1520.