Onderwaater Architecten I Ingenieurs

What Onderwaater Architecten I Ingenieurs does

Onderwaater Architecten | Ingenieurs is an independent Dutch architecture and engineering bureau (B.V.) headquartered in Alphen aan den Rijn, founded in 2005 by Bart Jan Onderwaater and rebranded under its current name in 2022. The firm delivers integrated architectural and engineering services across the full project lifecycle, spanning concept design, technical elaboration, construction and demolition supervision, and management during the use phase. Core service lines include architectural design and advisory (Architectuur Ontwerp & Advies), technical documentation (Technische Uitwerking), construction management and site supervision (Bouwbegeleiding & Directievoering), demolition management (Sloopmanagement), feasibility studies, project management, and specialized monument/heritage restoration including SIM-subsidie applications. The firm serves four primary customer segments — private individuals (the lead segment for residential renovations, villa construction, and farmhouse renewals), businesses (commercial expansions and retail modifications), municipalities and government bodies, and foundations/institutions managing historic or monumental properties.

The technology stack centers on BIM modelling using Revit and AutoCAD for 3D design and technical documentation, with digital scanning tools used for survey and documentation work. The firm operates under the Dutch DNR 2011 standard (De Nieuwe Regeling 2011) governing the legal relationship between client and architect/engineer, and follows customary multi-phase project workflows from initiation through exploitation. There is no evidence of proprietary AI/ML systems, public APIs, or software products; the offering is a professional services practice rather than a technology platform.

Commercially, the firm operates a sales-led, project-based professional services model with custom scoping per project, multi-year contract cadence, and direct client acquisition through reputation, referrals, and project portfolio. Marketing channels are limited to a project portfolio website (onderwaater.nu) and a LinkedIn company page. Over 21 years, the firm has completed more than 450 projects spanning roof extensions to large utility buildings, villas, and monumental animal enclosures, with notable clients including Stichting Natura Artis Magistra (Artis Micropia), HEMA/DIRK/Kruidvat (retail expansion), Gemeente Alphen aan den Rijn (multiple municipal projects), and Stichting Huis te Manpad (heritage estate). The firm is founder-controlled, bootstrapped, and privately held with no disclosed external investors, parent company, or subsidiaries, and it operates as a multidisciplinary team currently expanding via active recruitment for Senior Architect, Projectleider, and BIM-modelleur roles.

Name

Onderwaater Architecten I Ingenieurs

Legal name

Onderwaater Architecten Ingenieurs B.V.

Website

https://onderwaater.nu

Company type

Private

Founded year

2005

Operating status

Operating

Headcount range

11–50 employees

Short description

Onderwaater Architecten | Ingenieurs is an independent Dutch architecture and engineering firm in Alphen aan den Rijn delivering integrated architectural design, technical engineering, construction supervision, demolition management, and monument restoration services to private individuals, businesses, municipalities, and foundations across Western Netherlands.

Ownership category

akta.pro rank

Product category

Architectural and Engineering Services

NAICS

Architectural Services (54131), Architectural, Engineering, and Related Services (5413), Engineering Services (541330)

SIC

Services-Engineering Services (8711)

akta.pro primary industry

Architectural Design Services (BPAHAKAA)

akta.pro secondary industries

Historic Preservation & Conservation Planning (BPAHAKAH), Architectural Reconfiguration & Structural Alterations (HSAPAEAB)

Keywords

• Architectural design services
• Construction engineering bureau
• BIM modelling services
• Monument restoration services
• Demolition management services

Headquarters

HQ city

Alphen aan den Rijn

HQ country

Netherlands

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Architectural and Engineering Services: Professional services revenue from architectural design, technical engineering, construction management, and project supervision services. Services are provided across all phases of construction, demolition, and development projects from initial concept through to use phase management.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels3 records

Core offering

Onderwaater Architecten | Ingenieurs is an independent Dutch architecture and engineering bureau that delivers integrated services across all phases of construction, demolition, and development projects. The firm provides architectural design, technical engineering/detailing, construction management and site supervision, demolition management, feasibility studies, and project management, with specialized expertise in monument restoration and SIM-subsidie applications. Services follow the DNR 2011 industry standard and are delivered under a single point of contact for clients.

Product overview

Onderwaater Architecten | Ingenieurs is an independent architecture and engineering firm offering comprehensive services across all phases of construction, demolition, and development projects. The company operates as a single unified service offering rather than a platform-plus-modules architecture. Core services include architectural design (Ontwerp), technical engineering (Technische Uitwerking), construction management and site supervision (Bouwbegeleiding & Directievoering), demolition management (Sloopmanagement), feasibility studies, project management, and specialized heritage/monument restoration services. The company follows the DNR 2011 (De Nieuwe Regeling 2011) standard for professional architectural and engineering services in the Netherlands.

Differentiator

Problem solved

Functional benefit

Products and services

• Architectuur Ontwerp & Advies (Architectural Design & Advice)

Quantifiable outcome

• More than 450 projects completed with diverse scope
• +1 more outcomes

Named customers7 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

Feature1 record

Partnerships

Six partnerships are on record, tiered core and major.

• LBH BouwcoreImplementation/ SI/ Consulting PartnerMain contractor for villa construction projects including Villa Zuideinde Nieuwkoop - a dream villa project involving ground purchase, demolition of existing structure, and realization of custom villa with garden plan over 1.5 years.
• Omnia Bouw bvcoreImplementation/ SI/ Consulting PartnerConstruction partner for residential renovation and extension projects including woonboerderij renovation in Reeuwijk.
• BAM Schakel & Schrale B.V.majorImplementation/ SI/ Consulting PartnerConstruction and restoration contractor for Artis Micropia project involving monumental building renovation.
• Van Dijke Raadgevend IngenieursbureaumajorStrategic or Co-development PartnerEngineering advisor for complex projects including IKC Mariaschool Hoorn involving monument restoration and new construction.
• SCIO GroepmajorStrategic or Co-development PartnerProject team member for IKC Mariaschool Hoorn project involving complex monument reconversion with KDV, BSO, and school facilities.
• Stichting Huis te ManpadcoreStrategic or Co-development PartnerFoundation client for SIM-subsidie (monument subsidy) application covering 6 monumental buildings on an estate including rijksmonumenten (national monuments).

Scale indicators2 records

Recent moves7 records

Expansion highlights4 records

Direct peers

• Cepezed: Mid-sized Dutch architecture firm delivering integrated design and engineering services across residential, commercial, and industrial projects. Comparable to Onderwaater in offering multidisciplinary Dutch design services with technical elaboration, though larger in scale and more nationally recognized.
• KAAN Architecten: Rotterdam-based Dutch architecture studio with a multidisciplinary team spanning architecture, interior, urban planning, and research. Comparable to Onderwaater in delivering integrated design services to public and private clients across building types in the Netherlands.
• INBO: Mid-sized Dutch architecture and engineering consultancy with multidisciplinary teams and full lifecycle project delivery. Directly comparable to Onderwaater in offering integrated design-build services to Dutch municipalities, developers, and private clients.
• Powerhouse Company: Dutch architecture firm with a multidisciplinary team spanning architecture, interior, and urban design. Comparable to Onderwaater in offering integrated architectural services to Dutch and international clients across residential, commercial, and cultural typologies.
• Mecanoo Architecten: Dutch architecture firm with strong heritage and cultural-sector portfolio (libraries, museums, education). Comparable to Onderwaater in serving Dutch municipalities, cultural foundations, and education clients with full-lifecycle design services, though at significantly larger scale.
• Van Mourik B.V. Mid-sized Dutch architecture and engineering firm with a multidisciplinary team operating across residential, commercial, and public-sector projects. Comparable to Onderwaater in providing integrated Dutch design-build services with full project lifecycle coverage.

Broad incumbents

• Arcadis NV: Amsterdam-headquartered global design, engineering, and consultancy firm. Comparable to Onderwaater in serving Dutch public and private clients with building and urban development services, though operating at significantly larger scale and broader international footprint.
• Witteveen+Bos: Dutch engineering and consultancy firm with architecture-adjacent building services. Comparable to Onderwaater in serving Dutch municipalities and developers with engineering-led building project services, though predominantly focused on water, infrastructure, and environment.
• Royal HaskoningDHV: Large Dutch engineering and project management consultancy with architectural capabilities. Comparable to Onderwaater in serving Dutch municipalities and developers across building and infrastructure projects, though at global scale with a far broader service portfolio.

Regional players

• Buro Lubbers: Small Dutch architecture firm focused on residential and renovation projects. Comparable to Onderwaater in scale and Dutch regional market focus, with overlapping residential renovation and villa project expertise in the Netherlands.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks5 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/onderwaater-architecten-ingenieurs-bv

Revenue estimate

Valuation estimate

Number of profiles

Profiles8 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 Onderwaater Architecten I Ingenieurs