What i29 does

i29 is a Dutch architecture and interior design studio founded and led by co-Managing & Creative Directors Jaspar Jansen and Jeroen Dellensen, operating from Ouder-Amstel near Amsterdam with a team of approximately 10 employees. The firm delivers commissioned architecture and interior design services across residential (private villas, apartments, tiny homes), public sector (courthouses, government buildings, museums), corporate (Booking.com Campus, office redesigns), luxury retail (De Bijenkorf, Samsonite), and cultural (Felix Meritis, Museum Princessehof) projects, with completed work extending to Paris and Moscow. Its core capability is the integration of architecture and interior design within a single studio, including spatial concept development, material research, custom furniture and built-in cabinetry design, lighting and acoustic solutions, and creative direction during construction, supported by an established network of architecture firm partners and specialist contractors.

The studio's delivery model is project-based B2B professional services with fees negotiated per engagement, operating without published pricing. GTM is exclusively direct, with new business routed via referrals, direct inquiries, and introductions from partner architecture firms (KAAN, Paul de Ruiter, DP6, VMX, Bedaux de Brouwer, Chris Collaris, HofmanDujardin, UNStudio, MATH architecten) under which i29 often serves as interior design specialist on larger commissions. Production tooling is standard for the discipline (Vectorworks 2D/3D, Adobe Creative Suite, AutoCAD, Revit); the firm does not expose APIs or proprietary software and has no disclosed AI/ML capabilities. Marketing is portfolio-driven and relies on award recognition, press coverage, and social channels (Instagram, LinkedIn, Facebook, Pinterest) rather than paid acquisition.

Revenue depends on the cadence of a small number of high-value commissions; marquee anchors (Booking.com Campus, Felix Meritis, Courthouse Utrecht Building H) drive episodic lumpy revenue, balanced by a steady stream of villa-scale and smaller public projects. The firm holds a sub-brand, Câpsula, extending the studio into a productized tiny house line manufactured with Cretim BV.

Name

i29

Legal name

i29

Website

https://i29.nl

Company type

Private

Operating status

Operating

Headcount range

11–50 employees

Short description

i29 is a Dutch architecture and interior design studio of about 10 people, led by Jaspar Jansen and Jeroen Dellensen, delivering bespoke residential, corporate, public sector, and cultural projects through direct client engagement and architecture firm partnerships across the Netherlands and Europe.

Ownership category

akta.pro rank

Product category

Architecture and Interior Design Services

NAICS

Interior Design Services (541410), Architectural Services (54131)

akta.pro primary industry

Office & Corporate Building Construction (IMAFACAA)

akta.pro secondary industries

Residential Design-Build & Renovation-Integrated Builders (IMAFABAE), Hospitality & Entertainment Venue Construction (IMAFACAC)

Keywords

• Architecture design services
• Interior design services
• Residential architecture
• Commercial interior design
• Heritage building renovation

Headquarters

HQ city

Ouder-Amstel

HQ country

Netherlands

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales, Others

Revenue model

1. Architecture and Interior Design Services: i29 generates revenue through commissioned architecture and interior design projects. Projects span residential (private villas, apartments), public (courthouses, museums), office/workplace, retail, and hospitality sectors. Revenue is project-based, typically one-time per engagement with potential for follow-on work from returning clients.

Go-to-market motion2 records

Distribution channels2 records

Marketing channels7 records

Core offering

i29 is a Dutch architecture and interior design firm delivering commissioned design projects spanning residential, corporate, retail, hospitality, and public sectors. The studio provides integrated architecture and interior design services from spatial concept development through technical design and execution, including custom furniture and bespoke cabinetry. Projects range from private villas, apartments and tiny homes to large-scale corporate campuses, courthouse transformations and cultural institution renovations.

Product overview

i29 is an award-winning architecture and interior design firm offering comprehensive design services for residential, commercial, hospitality, and public projects. The firm operates as a unified studio without a platform-plus-modules architecture—its offering consists of core architecture and interior design services complemented by custom furniture design. The portfolio includes residential projects (villas, apartments, tiny homes like Câpsula, senior housing), hospitality projects (restaurants, hotel rooms like Hotel Casa), commercial offices (Tribal DDB, Schouw Informatisering), retail spaces (De Bijenkorf, Samsonite showroom), and public buildings (museums like Princessehof, Felix Meritis cultural center, courthouse transformations). Projects are characterized by minimalist design, custom furniture solutions, and integration of interior with exterior spaces.

Differentiator

Problem solved

Functional benefit

Brands

• Câpsula: Premium collection of tiny houses with distinctive design language, high-quality finish, and flexible usage properties. Includes Soft Lodge, Writer's Block Hut, and Tiny Holiday Home models.

Products and services

• Architecture Services
• Interior Design Services

Quantifiable outcome

• De Bijenkorf restaurant project resulted in 850 m2 of high-end dining space within a luxury department store
• +3 more outcomes

Named customers11 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

Feature3 records

Partnerships

18 partnerships are on record, tiered core and minor.

• DP6 ArchitectencoreStrategic or Co-development Partneri29 collaborates with DP6 as interior design partner on the Gerechtsgebouw Utrecht Building H transformation project (4,000 m2), commissioned by Rijksvastgoedbedrijf for SSR training institute. DP6 leads architecture while i29 provides interior design.
• KAAN ArchitectscoreStrategic or Co-development PartnerCollaboration on De Bijenkorf Amsterdam renovation project (3,500 m2 menswear department) and Booking.com Campus Amsterdam. KAAN provided architectural vision for De Bijenkorf project.
• Paul de Ruiter ArchitectscoreStrategic or Co-development PartnerLong-standing collaboration including Connecting with Nature villa in Bloemendaal (490 m2), Gerechtsgebouw Almelo new courthouse, and multiple private villa projects. Paul de Ruiter leads architecture while i29 provides interior design.
• HofmanDujardincoreStrategic or Co-development PartnerLead interior architect for Booking.com Campus (65,000 m2) in Amsterdam. i29 designed breakout spaces and restaurant High Garden within the campus masterplan. Multiple other design firms contributed to the project.
• VMX ArchitectsminorStrategic or Co-development PartnerCollaboration on Combiwerk community workplace (8,500 m2) and Loft office for MediaXplain (800 m2) in Amsterdam. VMX led architecture while i29 provided interior design.
• Bedaux de Brouwer ArchitectsminorStrategic or Co-development PartnerCollaboration on Outside In villa (400 m2) in Hilvarenbeek and Food for growth office for Schouw Informatisering (2,500 m2). Both firms contributed to architecture and interior design.
• Chris Collaris ArchitectsminorStrategic or Co-development PartnerCollaboration with Chris Collaris on Tiny Holiday Home (55 m2) at Vinkeveense plassen. Both firms contributed to design of the tiny house project.
• Rijnboutt ArchitectsminorStrategic or Co-development PartnerCollaboration on De Bijenkorf Utrecht restaurant (The Kitchen, 850 m2). Rijnboutt provided architecture while i29 designed the restaurant interior.
• MATH architectencoreStrategic or Co-development PartnerResponsible for structural renovation of Felix Meritis (4,500 m2) historic monument. i29 provided interior design in collaboration with Amerborgh as client. MATH handled building renovation while i29 designed all interior spaces.
• UNStudiocoreStrategic or Co-development PartnerUNStudio designed the Booking.com Campus building (65,000 m2) in Amsterdam. i29 contributed interior design for breakout spaces and restaurant as part of the multi-firm design team.
• LensveltminorImplementation/ SI/ Consulting PartnerFurniture supplier and collaborator for Felix Meritis (custom-designed Chair 'Felix') and Hotel Casa (518 hotel rooms). Lensvelt manufactured custom furniture designed by i29.
• GielissenminorImplementation/ SI/ Consulting PartnerInterior builder and contractor collaborating on multiple projects including Playful partitions (Avec), Felix Meritis, and Soothing discretion (BKR).
• Hagoort BouwminorImplementation/ SI/ Consulting PartnerConstruction contractor for multiple projects including Hidden Villa (249 m2), Tiny Holiday Home (55 m2), and Buitenverblijf Nest.
• Dura Vermeer Bouw HengelocoreImplementation/ SI/ Consulting PartnerMain contractor for Gerechtsgebouw Almelo new courthouse project. Dura Vermeer leads construction and development, with Paul de Ruiter Architects and i29 providing design. Project team also includes Dura Vermeer Techniek, DWA, Lucassen Bouwconstructies, Draaijer, ALBA Concepts, Meelis en Partners.
• J.P. Van EesterencoreImplementation/ SI/ Consulting PartnerMain contractor for Gerechtsgebouw Utrecht Building H transformation project. J.P. Van Eesteren is executing the 4,000 m2 renovation commissioned by Rijksvastgoedbedrijf.
• Osnova Group / APEX project bureauminorStrategic or Co-development Partneri29 is working on interior design for Red7 residential development in Moscow, developed by Osnova Group with MVRDV architecture and APEX project bureau as local designer. Project expected 2020.
• Cretim BVminorImplementation/ SI/ Consulting PartnerManufacturer for Câpsula premium tiny house collection (10 m2, 25 m2, 70 m2 units). i29 designed the tiny house collection in collaboration with Cretim BV for production.
• Linehouse Design, Studio Modijefsky, CBRE Design, Mijksenaar, MOSS, Powerplant, Scholten & Baijings, Studio RublekminorStrategic or Co-development PartnerMultiple design firms contributing to Booking.com Campus Amsterdam project alongside i29 and HofmanDujardin. Each firm designed specific areas within the 65,000 m2 campus.

Scale indicators2 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• VMX Architects: Amsterdam architecture firm and i29 partner on Combiwerk and Loft office projects. Comparable Dutch boutique architecture practice with similar workplace and interior collaboration model.
• KAAN Architecten: Rotterdam-based architecture firm and repeat i29 partner (De Bijenkorf, Booking.com). Comparable Dutch architecture practice with similar premium positioning across cultural, public, and commercial sectors.
• Concrete Architectural Associates: Amsterdam interior design firm with comparable portfolio across hospitality, retail, and workplace projects. Direct competitor in the Dutch premium interior design market with similar creative-led positioning.
• Studio Modijefsky: Amsterdam-based interior design firm specializing in hospitality, retail, and workplace interiors. Similar boutique scale and Dutch premium positioning make it directly comparable to i29's interior design practice.
• Studio Vincent Van Duysen: Belgian interior design and architecture practice with comparable boutique scale and premium residential/commercial focus. Operates in adjacent Benelux market with similar minimalist design philosophy.
• Paul de Ruiter Architects: Amsterdam sustainable architecture firm and long-standing i29 partner (Connecting with Nature villa, Courthouse Almelo). Comparable Dutch practice with similar premium and sustainability positioning.
• DP6 Architecten: Delft-based architecture firm and i29 partner on Courthouse Utrecht Building H (4,000 m²). Comparable Dutch practice with similar public sector and heritage renovation focus.
• HofmanDujardin: Amsterdam architecture firm and i29 partner on Booking.com Campus (65,000 m²). Comparable Dutch architecture practice with overlapping corporate, cultural, and interior design expertise.

Broad incumbents

• MVRDV: Major Rotterdam-based international architecture firm and i29 collaborator on Moscow Red7 project. Established global incumbent with much broader portfolio and significantly larger scale than i29.
• UNStudio: Major Amsterdam-headquartered international architecture firm and i29 partner on Booking.com Campus. Much larger and broader portfolio spanning architecture, urban design, and product design — established incumbent in the Dutch premium market.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/i29-interior-architects-190319081010539
• LinkedInlinkedin.com/company/i29-interior-architects
• Instagraminstagram.com/i29architects
• Pinterestnl.pinterest.com/i29interiors

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 i29