BPLUSB architectures

What BPLUSB architectures does

BPLUSB architectures (trade name BplusB) is a Lille-headquartered architecture firm founded by Anne-Caroline Boyaval-Caron and Benjamin Boyaval, with Angélique Sternheim as an associate, operating a team of 10 architects. The firm provides architectural design and urban-design services to two primary client groups: public-sector bodies (municipalities and communities of communes across Hauts-de-France, extending into northern Île-de-France, Amiens/Rouen in Normandie, and parts of Grand Est) and social housing operators (OPH/ESH including ADOMA/CDC Habitat, Vilogia, and Flandre Opale Habitat). Project types span schools, community centers, media libraries, covered market halls, social and participatory housing, and inclusive mixed-use facilities.

The firm's technical differentiation rests on sustainable construction and reversible-design methodology. Core competencies include wood-frame structures (charpente/ossature bois, portique bois), low-carbon and frugal construction (bas-carbone), PassivHaus/BEPOS/BBC-certified design, biosourced materials (straw construction under the Pro-Paille methodology), and material reuse (Réemploi) for rehabilitation projects. Proprietary design features include regular pillar-beam structural grids and dry-construction facades that allow future interior reorganization without major structural work. The practice operates BIM Level 2 methodology and is RGE-certified and accredited by ANAH as Mon Accompagnateur Rénov'.

Commercially, BPLUSB operates as a professional-services firm with project-based fees negotiated per commission, typically on multi-year contracts for public-sector clients. Go-to-market is dominated by competitive bidding (concours) on public tenders and direct commission from social housing providers. Distribution is purely regional and direct; the firm has no investor funding, no parent company, and no disclosed partnership beyond engineering consultancies (VERDI, Kiétudes, HDM, SLAP, Artelia), construction partners (Eiffage), and sustainability training organizations (CD2e, RFCP). Beyond core architectural services, the firm has built a complementary consulting practice covering energy auditing, MAR renovation accompaniment, Pro-Paille straw-construction consulting, co-ownership building management, and architectural imaging/rendering.

Name

BPLUSB architectures

Legal name

BPLUSB architectures

Website

https://bplusbarchitectures.com

Company type

Private

Founded year

2009

Operating status

Operating

Headcount range

1–10 employees

Short description

BPLUSB architectures is a Lille-headquartered architecture firm of 10 architects serving municipalities and social housing providers across northern France. The firm specializes in sustainable construction, including wood structures, reversible architecture, PassivHaus-certified design, and low-carbon material consulting.

Ownership category

akta.pro rank

Product category

Architecture Services

NAICS

Architectural Services (54131)

akta.pro primary industry

Architectural Design Services (BPAHAKAA)

akta.pro secondary industry

Community Engagement & Participatory Planning (BPAHAKAO)

Keywords

• Architecture design services
• Sustainable construction
• Social housing design
• Wood frame construction
• Urban revitalization

Headquarters

HQ city

Lille

HQ country

France

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Architecture and Design Services: Professional architecture services for public and private sector clients. Revenue is generated through project-based fees for design, planning, and project management of construction projects including social housing, schools, community centers, cultural facilities, and mixed-use developments.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels3 records

Core offering

BPLUSB architectures provides architectural design, urban planning, and project management services for public and private sector clients in northern France. The firm specializes in sustainable construction for social housing, schools, community centers, cultural facilities, and mixed-use developments, with expertise in wood construction, low-carbon design, and reversible architecture. Complementary services include energy auditing, renovation accompaniment (Mon Accompagnateur Renov'), straw construction consulting (Pro-Paille), material reuse, and co-ownership building management.

Product overview

BPLUSB architectures is an architecture firm based in Lille, France, founded by Anne-Caroline and Benjamin Boyaval, joined by Angélique Sternheim as an associate. The agency employs 10 architects and operates across the Lille metropolitan area, northern Paris region, Amiens, and Rouen. The company offers architectural design services for collective housing, cultural and school facilities, and renovation projects, complemented by specialized consulting services including energy auditing, renovation consulting (Mon Accompagnateur Renov'), straw construction consulting (Pro-Paille), construction material reuse, and co-ownership building management. The agency has completed projects ranging from 70-unit solidarity housing in Dunkerque to inclusive third-lieu facilities, market halls, and school buildings.

Differentiator

Problem solved

Functional benefit

Products and services

• Architecture Services Architectural design services for housing, cultural facilities, school buildings, and renovation projects across northern France. Serves public municipalities, social housing providers, and private developers with projects ranging from 70-unit solidarity housing to inclusive third-lieu facilities, market halls, and school buildings.
• Auditeur énergétique (Energy Auditor) Energy auditing services for residential houses, apartments, and buildings, including energy performance analysis and renovation roadmaps.
• Mon accompagnateur Renov' (MAR) ANAH-certified Mon Accompagnateur Rénov' service providing personalized renovation support including technical, administrative, and financial guidance for energy renovation projects.
• Pro-Paille (Straw Construction Consulting) Straw construction consulting for sustainable building with straw materials, with architects trained by CD2e and RFCP (Réseau Français de la Construction Paille).
• Réemploi dans la construction (Construction Reuse) Construction material reuse consulting, implementing material reuse strategies in rehabilitation and new construction projects with architects trained by CD2e.
• Copropriétés (Co-ownership Building Services) RGE-certified services for co-ownership buildings including AMO for state aid (MaPrimeRénov'), PPT (Plan Pluriannuel de Travaux), and DTG (Diagnostic Technique Global).
• Imagerie pour l'Architecture (Architectural Imaging) Architectural imaging services including visualization renders and films for client presentations.

Quantifiable outcome

• Award-winning sustainable construction with multiple regional wood construction prizes
• +1 more outcomes

Named customers9 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

Eight partnerships are on record, tiered core, regular and strategic.

• VERDI (Engineering)coreTechnology or IntegrationEngineering consultancy partner providing structural, MEP, and environmental consulting on multiple projects including social housing and public facilities. Collaborated on projects such as Sailly-sur-la-Lys housing (44 units), Centre Social des 3 Ponts in Roubaix, and various other municipal projects.
• KiétudescoreTechnology or IntegrationEngineering consultancy partner providing technical studies and engineering services. Involved in social housing projects including Sailly-sur-la-Lys and other public facilities throughout the region.
• HDM (HDM Ingénierie)coreTechnology or IntegrationEngineering partner providing technical and structural engineering services. Worked on multiple school projects including École Jules Ferry in Hem, Groupe Scolaire in Drancy, and various other educational facilities.
• SLAPregularTechnology or IntegrationEngineering and technical consultancy partner collaborating on various projects including residential developments and public facilities in the northern France region.
• ArteliaregularTechnology or IntegrationEngineering and project management consultancy. Partnered on Centre Social du Fort Nieulay project in Calais.
• Eiffage ConstructionregularImplementation/ SI/ Consulting PartnerConstruction company partner for the Résidence Nadia Farissi (70 solidarity housing units) project in Dunkerque with ADOMA.
• CD2estrategicStrategic or Co-development PartnerTraining and development organization that trained BPLUSB architects in straw construction (Pro-Paille) and material reuse in construction (Réemploi). Strategic partner for sustainable construction methodology development.
• Réseau Français de la Construction Paille (RFCP)strategicStrategic or Co-development PartnerFrench network for straw construction that provides training and certification for Pro-Paille methodology. BPLUSB architects trained through this network for straw building techniques.

Scale indicators3 records

Recent moves6 records

Expansion highlights2 records

Broad incumbents

• Architecture-Studio: Large established French architecture practice with a broad portfolio spanning housing, cultural and public buildings internationally. Operates in the same architectural services category as BPLUSB but at significantly larger scale.
• Wilmotte & Associés: Major French architecture firm with deep public-sector, cultural and residential work. Comparable professional-services offering, though broader geographic scope and larger team than BPLUSB.
• Atelier d'Architecture Christian de Portzamparc: Major established French practice with extensive cultural, public and residential work including social housing. Overlaps with BPLUSB in offering public-sector architectural services but at much broader scale.

Direct peers

• Tetrarc: French architecture firm based in Nantes with a comparable focus on social housing, cultural facilities and public-sector projects, often using wood and biosourced materials. Closely matches BPLUSB's project typology and client mix.
• Groupe-6: Grenoble-based French architecture firm with strong credentials in public facilities, social housing and healthcare architecture. Similar concours-driven, public-sector business model and project typology.
• Dominique Coulon et Associés: Strasbourg-based French architecture firm known for cultural, educational and social public buildings with strong material experimentation. Similar typology and concours-driven model.
• PETITDIDIERPRIOUX Architectes: Paris-based French firm recognized for social housing, heritage rehabilitation and public architecture. Directly comparable to BPLUSB on social-housing and rehabilitation mandates.
• ECDM Architectes: French architecture firm combining residential, public and cultural work with a sustainability orientation. Comparable scale and project mix to BPLUSB's northern France practice.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks5 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/bplusb-architectures
• Facebookfacebook.com/bplusbarchitectures

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 BPLUSB architectures