Architectenbureau Piet Onderwater & Partners

What Architectenbureau Piet Onderwater & Partners does

Architectenbureau Piet Onderwater & Partners is a privately held Dutch architectural firm founded on September 1, 1980 by Piet Onderwater and headquartered at Vliet Zuidzijde 5, Rijnsburg, Netherlands. The firm provides a full-scope architectural service covering preliminary design, construction drawings, environmental permit (omgevingsvergunning) applications, STABU specifications, and construction supervision (bouwbegeleiding) under a single point of contact. It currently operates with 12 employees and has been owned since 2017 by co-owners Kees van der Meij and Jeroen Guldemond, who continue to run the bureau under the original brand.

The firm serves five primary customer segments — private individuals (particulieren), housing associations (woningbouwcoöperaties), project developers (projectontwikkelaars), contractors (aannemers), and entrepreneurs (ondernemers) — and applies its offering across five service categories: residential construction, commercial/utility construction, renovation (including monumental restoration with BRIM subsidy handling), conversion/extension, and transformation of obsolete commercial buildings. Geographically, work is concentrated in Rijnsburg, Katwijk, Noordwijk, and the broader Duin- en Bollenstreek region, with the firm explicitly accepting projects well beyond that footprint.

The underlying technology stack is conventional for the sector: Autodesk AutoCAD for 2D drafting and Revit for Building Information Modeling (BIM), used for collaborative design across project parties. Revenue is generated exclusively through professional service fees quoted per project, with no public pricing, no disclosed revenue, no external funding, no AI/ML capabilities, no proprietary platform, and no patents, awards, or partnerships disclosed. Go-to-market is direct and relationship-driven, with the website serving as a portfolio showcase and walk-in office availability supporting in-person engagement.

Name

Architectenbureau Piet Onderwater & Partners

Legal name

Architectenbureau Piet Onderwater & Partners

Website

https://onderwater-partners.nl

Company type

Private

Founded year

1980

Operating status

Operating

Headcount range

11–50 employees

Short description

Architectenbureau Piet Onderwater & Partners is a privately held Dutch architectural firm founded in 1980, offering full-service design, permitting, specifications, and construction supervision for residential, commercial, and renovation projects primarily in the Duin- en Bollenstreek region.

Ownership category

akta.pro rank

Product category

Architectural Services

NAICS

Architectural Services (54131), Architectural Services (541310), Architectural, Engineering, and Related Services (5413)

SIC

Services-Engineering Services (8711)

akta.pro primary industry

Civil & Structural Engineering Consulting (BPAHAIAA)

Keywords

• Architectural design services
• Residential architecture
• Commercial architecture
• Building permit applications
• Construction supervision

Headquarters

HQ city

Rijnsburg

HQ country

Netherlands

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Technology or R&D

Revenue model

1. Architectural Design Services: Comprehensive architectural design services for residential and commercial construction projects, including conceptual design, preliminary design, definitive design, and working drawings. Revenue is generated through professional service fees for design work.

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels2 records

Core offering

Architectenbureau Piet Onderwater & Partners is a Dutch architectural firm providing comprehensive architectural services for residential, commercial, renovation, and transformation projects. The firm delivers end-to-end project support including design, construction drawings, building permit applications, STABU specifications writing, and on-site construction supervision. Services are provided under one roof, with the firm acting as a single point of contact coordinating communication with structural engineers, cost experts, and contractors throughout the building process.

Product overview

Architectenbureau Piet Onderwater & Partners is an architectural firm founded in 1980 offering a comprehensive suite of architectural and construction consultancy services. The core offering spans five integrated services — Ontwerp (Design), Bouwtekeningen (Construction Drawings), Omgevingsvergunning (Building Permits), Bestek (Specifications/STA BU), and Bouwbegeleiding (Construction Supervision) — delivered as a unified end-to-end service from sketch to handover under one roof. These are complemented by five specialized service categories: Woningbouw (Residential), Utiliteitsbouw (Commercial), Renovatie (Renovation), Verbouw (Conversion/Extension), and Transformatie (Transformation), covering the full project lifecycle from initial concept through permit acquisition, tendering, and construction management.

Differentiator

Problem solved

Functional benefit

Products and services

• Ontwerp (Design)
• Bouwtekeningen (Construction Drawings)
• Omgevingsvergunning (Building Permit)
• Bestek (Specifications)
• Bouwbegeleiding (Construction Supervision)
• Woningbouw (Residential Construction)
• Utiliteitsbouw (Commercial Construction)
• Renovatie (Renovation)
• Verbouw (Conversion/Extension)
• Transformatie (Transformation) Transformation of unused commercial buildings into new functions, drawing on experience in residential and commercial design to reinforce the qualities of existing structures in a new use.

Quantifiable outcome

• Comprehensive support from preliminary design through final delivery with single point of contact
• +2 more outcomes

Named customers15 records

Segments5 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature2 records

Scale indicators2 records

Recent moves4 records

Expansion highlights3 records

Broad incumbents

• MVRDV: MVRDV is a globally recognized Dutch architecture firm founded in 1993 in Rotterdam, delivering architecture, urbanism, and research across building types. It is comparable as a Dutch-headquartered full-service architecture practice, though operating at vastly greater scale and international reach.
• NIO Architecten: NIO Architecten is a Dutch architecture firm based in Amsterdam working on residential, commercial, and public projects. It is comparable as a Netherlands-based integrated architecture practice with similar service offerings, though at larger scale than the subject.
• UNStudio: UNStudio is a Dutch architecture firm founded in 1988 in Amsterdam, with global project delivery across architecture, interior, and urban design. It is comparable as a Dutch-rooted integrated design firm working across building typologies, though at significantly larger scale than the subject.
• Benthem Crouwel Architects: Benthem Crouwel Architects is a Dutch architecture firm founded in 1979 in Amsterdam, working across transport, public, and commercial buildings. It is comparable as a long-established Netherlands-based architecture practice delivering similar integrated design services, though with much larger project portfolios.
• cepezed: cepezed is a Dutch architecture firm founded in 1973 in Delft, offering integrated architecture and interior design services with emphasis on BIM-driven workflows. It is comparable as a long-standing Dutch architecture practice sharing the BIM methodology focus, though operating at larger scale.
• Ector Hoogstad Architecten: Ector Hoogstad Architecten is a Dutch architecture firm based in Rotterdam, with a long history of integrated architecture services across residential and commercial buildings. It is comparable as a Netherlands-based full-service architecture practice with comparable scope, though materially larger in scale than the subject.
• ZUS (Zones Urbaines Sensibles): ZUS is a Dutch architecture and urbanism firm founded in 2001 in Rotterdam, with focus on architecture, urban planning, and area development. It is comparable as a Netherlands-based architecture practice engaged in both building design and urban planning, though with different geographic focus from the subject.
• DUS Architects: DUS Architects is a Dutch architecture firm founded in 2005 in Amsterdam, working on architecture, urbanism, and product design. It is comparable as a Netherlands-based integrated architecture practice covering residential, commercial, and public buildings, though at larger scale and with stronger technology orientation.
• Mecanoo: Mecanoo is an established Dutch architecture firm founded in 1984 and based in Delft, offering full architectural services across residential, commercial, and public buildings. It is comparable as a Dutch-headquartered architecture practice delivering integrated design services, though operating at much larger scale and international scope than the subject.
• KAAN Architecten: KAAN Architecten is a Dutch architecture firm founded in 1987 in Rotterdam, providing architecture, urbanism, and research services. It is comparable as a Netherlands-based integrated architecture practice, though materially larger in headcount and project scale than the subject.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat3 records

Key risks6 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/AchitectenbureauPietOnderwaterPartners

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 Architectenbureau Piet Onderwater & Partners