What Arhitekt11 OÜ does

Arhitekt11 OÜ is a private Estonian architectural practice headquartered in Tallinn (Joa tn 2/1, Kadriorg) that has been operating for more than 20 years, having been established around 2000. It is registered as an Estonian private limited company (OÜ) with no parent company, subsidiaries, external investors, or funding rounds disclosed; CEO Janar Toomesso is the named executive in source material. The firm provides a full-service architectural offering: architecture (commercial, residential and public buildings), interior architecture, landscape architecture, BIM-based design, and project management, delivered through a Tallinn-based team with project execution across Estonia and selective Baltic-region exposure.

Arhitekt11's go-to-market is sales-led and competition-led: the firm acquires the majority of its work by winning open and invited architectural competitions and through direct enterprise and government engagements. Its customers sit in five segments — commercial real estate developers (e.g., US Real Estate/Urmas Sõõrumaa, SEB, Swedbank, Sorainen), public-sector institutions (Police and Border Guard Board, Estonian Academy of Security Sciences, E-Governance Academy), residential developers (LVM Kinnisvara, Metro), interior architecture clients, and private individuals — and projects are delivered on a professional-services, project-fee basis with pricing tied to scope and complexity rather than disclosed unit rates.

In 2025 the firm achieved material commercial inflection: more than 100% revenue growth per the CEO, four flagship commissions totaling roughly 79,000 m² (Swedbank Arter ~27,000 m², SEB Talsinki ~20,000 m², Golden Gate ~19,000 m², Raadi Education Centre ~13,000 m²), reclaiming the #1 position in Estonia's Arhitektuuribüroode TOP ranking (previously won in 2017), and the Arter Quarter winning best office development in the Baltics. Strategic co-development partnerships — HGA on Talsinki, Lundén Architecture on Vesilennuki 2, Gensler on the Tartu Highway 17 high-rise, and TajuRuum/Punktiir for landscape — define its current delivery model.

Name

Arhitekt11 OÜ

Legal name

Arhitekt11 OÜ

Website

https://arhitekt11.ee

Company type

Private

Founded year

2000

Operating status

Operating

Short description

Arhitekt11 OÜ is a Tallinn-based, full-service Estonian architectural practice that delivers architecture, interior architecture, landscape architecture, BIM design, and project management to enterprise, government, and developer clients across Estonia, primarily through architectural competition wins.

Ownership category

akta.pro rank

Product category

Architectural Services

NAICS

Architectural Services (54131), Interior Design Services (54141), Landscape Architectural Services (54132)

SIC

Services-Engineering Services (8711)

akta.pro primary industry

Architectural Design Services (BPAHAKAA)

akta.pro secondary industry

Interior Design Services (BPAHAKAB)

Keywords

• Architectural design services
• Interior architecture design
• Landscape architecture services
• BIM design services
• Building project management

Headquarters

HQ city

Tallinn

HQ country

Estonia

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 Services: Professional architectural services for various project types including residential, commercial, public buildings, and interior architecture. Revenue generated through project fees based on scope and complexity of architectural services.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

Arhitekt11 OÜ is a full-service architectural firm offering architectural design, interior architecture, and landscape architecture services supported by BIM (Building Information Modeling) design capabilities and project management. The firm delivers complete design services from concept to completion for residential, commercial, and public buildings, including office buildings, headquarters, schools, sports facilities, cultural buildings, and residential developments across Estonia.

Product overview

Arhitekt11 OÜ is a full-service architectural firm offering architecture, interior architecture, and landscape architecture services. The company provides BIM design capabilities and strong project management alongside their creative vision. Their portfolio spans residential buildings (apartment buildings, private residences), commercial buildings (office buildings), public buildings, and competition projects. The firm has completed projects including the Tartu University Delta Centre, Swedbank Estonia Headquarters, Arter Quarter, Golden Gate office building, and various residential developments across Estonia.

Differentiator

Problem solved

Functional benefit

Products and services

• Architectural Design Services Full architectural design services for commercial, residential, and public buildings, including office buildings, headquarters, schools, sports facilities, cultural buildings, and residential developments, delivered from concept through completion for real estate developers, government entities, and enterprises across Estonia.
• Interior Architecture Services Interior design and spatial planning services for residential and commercial spaces, including office interiors, public building interiors, and residential interiors, delivered for enterprise clients and private individuals.
• Landscape Architecture Services Landscape design services covering outdoor spaces, gardens, and urban landscapes, integrated with the firm's architectural projects across Estonia.

Quantifiable outcome

• Arter Quarter recognized as best office and commercial real estate development in Baltics at 2025 Baltic Real Estate Awards
• +3 more outcomes

Named customers10 records

Segments5 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature2 records

Partnerships

Six partnerships are on record, tiered minor and major.

• DataCap OÜminorStrategic or Co-development Partner · 13 June 2024Contract signed for surveying work required for Patarei Sea Fortress development project.
• Lundén Architecture CompanymajorStrategic or Co-development Partner · 1 January 2021Joint partnership on Vesilennuki 2 project - multifunctional complex with office space, commercial premises, and apartments next to Patarei Sea Fortress. Competition win in 2021.
• GenslermajorStrategic or Co-development PartnerCollaboration on Tartu Highway 17 high-rise project (125m skyscraper). Gensler partnership on this landmark architectural competition entry.
• HGA (Arhitektuuribüroo HGA)majorStrategic or Co-development PartnerCollaboration on Talsinki quarter development alongside Arhitekt11. Talsinki is a major mixed-use development in Tallinn's Admiral Basin area.
• Studio ARGUSminorImplementation/ SI/ Consulting PartnerInterior architecture studio collaborating on Talsinki quarter interior design.
• LÄVIminorImplementation/ SI/ Consulting PartnerInterior architecture studio collaborating on Talsinki quarter interior design.

Scale indicators4 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• KOKO architects: Estonian architecture firm of comparable scale operating in Tallinn with a similar competition-led GTM and portfolio of public, commercial and residential projects. Directly comparable as a domestic peer competing for the same Estonian architectural mandates.
• Salto Architects: Tallinn-based architecture studio with a comparable portfolio of public, educational and residential projects and a competition-driven business model. A direct Estonian peer competing for the same marquee mandates.
• 3+1 Architects: Estonian architecture firm with a similar focus on public buildings, offices and mixed-use developments and an active presence in architectural competitions. Direct domestic peer with overlapping client and project types.
• Kosmos Architects: Tallinn-based architecture firm active in Estonian architectural competitions across public, commercial and cultural buildings. Comparable in scale and competition-driven business development approach.
• Molumba: Estonian architecture studio participating in high-profile national competitions (e.g. Maakri quarter, won by Molumba over Arhitekt11 in 2024). A direct competitor for the same Estonian marquee mandates.
• Hayashi-Gross-Schmidt (HGS): Estonian architecture practice with a portfolio of public and commercial projects including education and cultural buildings. Directly comparable as a domestic peer in the Estonian competition ecosystem.
• Lundén Architecture Company: Finnish architecture firm that already partners with Arhitekt11 on the Vesilennuki 2 competition win. Comparable as a Nordic-Baltic peer with a similar competition-driven, design-led approach and cross-border Baltic exposure.

Broad incumbents

• Gensler: Global architecture and design firm that partnered with Arhitekt11 on the Tartu Highway 17 high-rise competition. Comparable as a much larger incumbent bidding for the same Estonian landmark office and mixed-use mandates.
• Foster + Partners: Global architecture firm competing for high-profile civic and commercial commissions. Relevant incumbent peer because projects of Arhitekt11's scale (e.g. Talsinki 125m skyscraper) increasingly attract global competing bids.
• BIG (Bjarke Ingels Group): International architecture firm known for landmark commercial and cultural projects. Relevant incumbent peer because of its active competition for high-profile European mixed-use and office commissions of the type Arhitekt11 increasingly targets.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

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 Arhitekt11 OÜ