What HASA architecten does

HASA architecten is a Belgian architecture firm headquartered in Muizen (Mechelen area), Belgium, founded in 2001 and led by managing director Sarah Flebus. The firm offers professional architectural services across eight practice areas: education (onderwijs), healthcare/care (zorggebouw), residential (wonen), offices (kantoren), public buildings (publiek), utility (utilitair), interior design (interieur), and urban planning (stedenbouw). Its core technical focus is sustainable, human-centered design — including passive house standards, circular construction with demountable systems (e.g., JUUNOO walls at PTS Mechelen), and adaptive reuse of heritage structures (Arenbergkasteel, Oude Veeartsenschool Anderlecht). The firm has delivered over 100 projects distributed across Belgium with a single international engagement in Paris.

HASA's business model is project-based professional services revenue, secured primarily through architectural competitions (wedstrijden), public procurement (Open Oproep Vlaamse Bouwmeester, Scholen van Morgen PPP), and direct commissions from institutional and private clients. Key clients include the GO! network of Flemish Community Education (six-plus named school projects), Imelda Ziekenhuis Bonheiden (masterplan, admin building, day hospital, interior), KULeuven (Arenbergkasteel ASRO renovation), Toerisme Vlaanderen, and social housing agencies (AG Vespa, SWaL). The firm differentiates through humane design for vulnerable populations (special education, care for the disabled), heritage adaptive reuse, and recognized sustainable-design expertise. Pricing is determined per project via competition or commission and is not publicly disclosed.

The firm operates with 11 employees and is privately held, with no disclosed external shareholders or funding rounds. Strategic alliances include Consortium Aurora (with evr and dbv) for major GO! school campuses, the AG Real Estate 'Scholen van Morgen' PPP framework, and recurring collaborations with engineering consultancies (Sweco, Tractebel, Cenergie) and landscape architect Ars Horti. Recognition includes Bouwvrouw van het Jaar 2025 for Sarah Flebus, the 2021 PUBLICA Awards Bronze, the 2022 Belgian Building Awards nomination, and Archello Awards 2025 finalist status for PTS Campus Mechelen.

Name

HASA architecten

Legal name

Hasa Architecten

Website

https://hasa.be

Company type

Private

Founded year

2015

Operating status

Operating

Headcount range

11–50 employees

Short description

HASA architecten is a Belgian architecture firm in Muizen (Mechelen) specializing in sustainable design for education, healthcare, residential, and public-sector clients across Belgium. It delivers projects through public competitions, PPP frameworks, and direct commissions under managing director Sarah Flebus.

Ownership category

akta.pro rank

Product category

Architectural Services

NAICS

Architectural Services (54131), Interior Design Services (54141)

SIC

Services-Engineering, Accounting, Research, Management (8700), Services-Engineering Services (8711)

akta.pro primary industry

Architectural Design Services (BPAHAKAA)

akta.pro secondary industry

Interior Design Services (BPAHAKAB)

Keywords

• Architectural design services
• Sustainable building design
• Educational facility architecture
• Healthcare facility design
• Heritage adaptive reuse

Headquarters

HQ city

Muizen

HQ country

Belgium

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Architectural Design Services: Professional architecture services billed as project-based fees for design, planning, and project management of construction projects including schools, healthcare facilities, residential buildings, and public buildings.

Go-to-market motion1 record

Distribution channels4 records

Marketing channels6 records

Core offering

HASA architecten is a Belgian architecture firm that delivers integrated architectural design services spanning education, healthcare, residential, public infrastructure, offices, culture and heritage, hospitality, and industrial projects. The firm operates from Muizen, Belgium with 11 staff and combines new-build design, renovation, interior, and masterplanning services with a stated focus on sustainable, circular, and passive construction principles.

Product overview

HASA architecten is an architectural firm offering a comprehensive portfolio of architectural and design services organized across eight service categories: education (onderwijs), healthcare (zorggebouw), residential (wonen), offices (kantoren), public buildings (publiek), utility (utilitair), interior design (interieur), and urban planning (stedenbouw). The firm specializes in sustainable, circular, and energy-efficient building design with expertise in projects ranging from individual homes to large-scale institutional and educational campuses. Their integrated approach combines architecture with interior design, urban planning, and landscape architecture through collaborations with specialized engineering and consultancy partners.

Differentiator

Problem solved

Functional benefit

Products and services

• Education Architecture

Quantifiable outcome

• Passive house standards achieved in first passive house project (Woning G Blanden), shortlisted for Belgian Prize for Architecture and Energy 2011
• +1 more outcomes

Named customers6 records

Segments4 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Four partnerships are on record, tiered core and minor.

• Consortium Aurora (with evr and dbv)coreStrategic or Co-development PartnerHASA architecten is part of Consortium Aurora along with evr and dbv, working on multiple new GO! school projects. The consortium was selected to design and build GO! Basisschool De Kiliaan in Duffel and GO! Basisschool Reynaert & middenschool Stapsteen in Kruibeke, representing a total investment of 60 million euros for 1,700 students.
• PARS-PRO-TOTOcoreStrategic or Co-development PartnerCollaboration with PARS-PRO-TOTO on the Toerisme Vlaanderen project in Brussels. HASA handled the architectural approach while PARS-PRO-TOTO developed the multimedia content and Visit Flanders branding integration.
• TweestroomminorStrategic or Co-development PartnerCollaboration with Tweestroom architecture firm on woonwijk te Willebroek 2 social housing project. HASA + Tweestroom jointly responsible for architecture.
• AG Real Estate (Scholen van Morgen)coreStrategic or Co-development PartnerAG Real Estate is the private partner in the Scholen van Morgen (Schools of Tomorrow) public-private partnership. HASA has designed multiple schools within this framework including Middelbare school 'Visitatie' Mariakerke, Middelbare school 'Viso Cor Mariae' Brakel, and others.

Scale indicators2 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• dbv architecten: Belgian architecture firm partnered with HASA in Consortium Aurora for the €60M GO! school portfolio. Highly comparable mid-sized Flemish practice competing in the same public-procurement and education/healthcare niches.
• evr-architecten: Belgian architecture firm and HASA's direct partner in Consortium Aurora for the GO! school program. Closest comparable peer because it shares HASA's project types (schools, healthcare, residential), geography, headcount profile, and procurement-led business model.
• Bovenbouw Architectuur: Antwerp-based architecture studio of similar size and aesthetic philosophy to HASA, focused on sustainable, context-sensitive urban projects and public commissions. Comparable on geography, scale, and design-led positioning.
• Polo Architects: Belgian architecture firm focused on education, housing, and urban renewal projects with strong public-procurement credentials. Directly comparable on target segments (especially schools and social housing) and Belgian competition-based GTM.
• DDS+: Belgian architecture firm with active involvement in schools, healthcare, and public tender projects through DBFM and Scholen van Morgen-type frameworks. Comparable on public-procurement competition wins and education/healthcare verticals.
• AWG architecten: Antwerp- and broader-Flanders-based architecture practice working on schools, residential, and public commissions. Similar geographic footprint and competition-driven project mix to HASA.

Broad incumbents

• Stéphane Beel Architects: Established Belgian architecture practice with deep institutional, cultural, and residential portfolio. Comparable as a Flemish-design-led peer with public-sector competition credibility, though larger and longer-tenured than HASA.
• XDGA: Brussels-based architecture firm with strong international publication profile and Belgian public-sector commissions. Overlaps with HASA on culture, public, and education briefs but at a larger scale and broader geography.
• Bogdan & Van Broeck: Brussels-based, larger-scope architecture practice with strong portfolio of housing, schools, and adaptive-reuse projects. Overlaps with HASA on social housing, schools, and circular-construction themes but competes across a wider category range.

Regional players

• LAVA (Laboratory for Visionary Architecture): Internationally oriented architecture firm with collaboration history with HASA on PTS Mechelen. Comparable on the adaptive-reuse and education verticals but primarily competes on a global stage rather than Belgian procurement.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/HasaArchitecten
• Pinterestpinterest.com/hasaarchitecten
• LinkedInlinkedin.com/company/hasa-architecten

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 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 HASA architecten