Andersen & Sigurdsson Architects

What Andersen & Sigurdsson Architects does

Andersen & Sigurdsson Architects is a private architectural partnership founded in Copenhagen in 1997 by Ene Cordt Andersen and Thorhallur (Halli) Sigurdsson. The firm offers full-service architectural design across residential, cultural, educational, public, and infrastructure typologies — ranging from small private commissions (e.g., 173 m2 summer houses) to large-scale master plans and airport terminals (e.g., 14,500 m2 Keflavik Airport). Project work spans Denmark, Iceland, Greenland, and Germany.

The firm's core technology is its design expertise and competition methodology rather than software or proprietary platforms. It has built a competitive portfolio through repeated success in open and invited architectural competitions — with first-prize wins on projects such as the Alftanes Master Plan (2017), Gufunes waterfront (2021/2022), Visitor Centre Borgarfjörður Eystri, and the Betty Nansen Theatre extension — alongside direct commissions. The firm sustains production through an ecosystem of long-standing engineering collaborators including Rambøll, Arup, Buro Happold, and Teikn Architects (Iceland), and has received three EU Mies van der Rohe Award nominations (2003, 2017, 2022) plus Børsen Gazelle recognition in 2024.

The business model is project-based fee revenue from public and private commissions, with no publicly disclosed pricing. The firm employs 7 people and runs as a two-partner private partnership without external investors. Customer concentration is heavily skewed toward public and institutional clients — municipalities, government agencies, and cultural institutions — with private residential work as a secondary stream. Geographic concentration is in the Nordic region (Denmark, Iceland), with selective expansion into Greenland and Germany.

Name

Andersen & Sigurdsson Architects

Legal name

Andersen & Sigurdsson Architects

Website

https://a-s.dk

Company type

Private

Founded year

1997

Operating status

Operating

Headcount range

1–10 employees

Short description

Andersen & Sigurdsson Architects is a 7-person Copenhagen-based architectural partnership founded in 1997, offering full-service architectural design across residential, cultural, public, and infrastructure typologies for government and private clients primarily in Denmark and Iceland.

Ownership category

akta.pro rank

Product category

Architectural Services

NAICS

Architectural Services (54131), Landscape Architectural Services (54132)

akta.pro primary industry

Architectural Design Services (BPAHAKAA)

akta.pro secondary industries

Landscape Architecture & Site Design (BPAHAKAC), Community Engagement & Participatory Planning (BPAHAKAO)

Keywords

• Architectural design services
• Building design
• Master planning
• Urban development
• Cultural buildings

Headquarters

HQ city

Frederiksberg C

HQ country

Denmark

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Architectural Design Services: Project-based fees generated through architectural commissions, competition prizes, and concept development work for public and private clients. Revenue comes from winning competitions (1st prize entries) and direct commissions from municipalities, government entities, and private individuals.

Go-to-market motion1 record

Distribution channels3 records

Marketing channels5 records

Core offering

Andersen & Sigurdsson Architects provides full-service architectural design across residential, cultural, educational, public, and infrastructure typologies. The firm delivers concept development, competition entries, master planning, and project commissions for municipalities, government bodies, and private clients in Denmark, Iceland, and other Nordic markets. Project scale ranges from small pavilions (~9 m2) to large 30,000 m2 health centers and 350-dwelling master plans.

Product overview

Andersen & Sigurdsson Architects is an architectural practice established in Copenhagen in 1997 by Ene Cordt Andersen and Thorhallur Sigurdsson. The firm offers a comprehensive portfolio of architectural design services across multiple building typologies, including residential projects (summer houses, villa extensions, housing), cultural facilities (theaters, concert halls, visitor centers), educational institutions (kindergartens, schools), public buildings (government facilities, retirement homes, health centers), and infrastructure projects (airports, bridges, sports facilities). The practice operates primarily in Denmark and Iceland, with completed and ongoing projects spanning sizes from small 9 m2 pavilions to large-scale 30,000 m2 developments. The firm has achieved recognition through multiple competition wins and Mies van der Rohe Award nominations.

Differentiator

Problem solved

Functional benefit

Products and services

• Architectural Design Services Full-service architectural design covering residential, cultural, educational, public, and infrastructure projects across Denmark, Iceland, and internationally.
• Summer House Design Residential summer house design featuring CLT and steel construction, panoramic windows, and integration with natural Icelandic landscapes.
• Hotel Cabin Design Sustainable hotel cabin design featuring dark wood exteriors, warm CLT interiors, and large windows for mountain and northern lights views.
• Visitor Center Design Public visitor center architecture including the award-winning Borgarfjordur Eystri center with cube-shaped monolith design.
• Airport Terminal Design Airport terminal extensions including Keflavik Airport busgate terminal (4,700 m2) with Icelandic geological-inspired design, nominated for Mies van der Rohe Award.
• Kindergarten and School Design Educational facility design including kindergartens, schools, and extensions featuring spatial qualities for children's sensory stimulation.
• Cultural Building Design Cultural and performing arts facilities including concert halls, theaters, and community centers such as Hof Concert Hall and Betty Nansen Theatre.
• Master Planning Urban master planning services including the Alftanes Master Plan (350 dwellings) and Gufunes waterfront development in Reykjavik.
• Infrastructure Project Design Infrastructure design including pedestrian bridges, sports facilities, heating stations, and sports canopies with steel frameworks and textile roofs.

Quantifiable outcome

• Multiple Mies van der Rohe Award nominations for completed projects
• +2 more outcomes

Named customers10 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Partnerships

16 partnerships are on record, tiered core, major, flagship and minor.

• Teikn Architects / Teikn ArkitektaþjónustacoreStrategic or Co-development PartnerLong-standing collaboration with Icelandic architecture firm Teikn Architects on multiple projects including Keflavik Airport extensions, CLT Summerhouse, Eldar North, and Government Building in Reykjavik. Teikn provides local expertise and on-the-ground support for Icelandic projects.
• Va arkitektar / Basalt arkitektarcoreStrategic or Co-development PartnerCollaborated with Icelandic architecture firms on projects including Villa Wave, Parish Centre, and Waldorf School in Reykjavik. Joint working relationship for Icelandic residential and institutional projects.
• RambøllmajorImplementation/ SI/ Consulting PartnerEngineering collaboration on numerous projects including Godthaab Kindergarten, Sports Canopy, CBS transformation, and various sports facilities. Rambøll provides structural and civil engineering services.
• LandslagmajorImplementation/ SI/ Consulting PartnerLandscape architecture collaboration on Alftanes Master Plan project. Landslag provides landscape design expertise for the 350-dwelling residential development in Iceland.
• Verkís / VíaplanmajorImplementation/ SI/ Consulting PartnerEngineering and planning consultants on Alftanes Master Plan. Verkís provides technical engineering services for the mixed-use development project.
• jvantspijker & partners and Felixx Landscape ArchitectsflagshipStrategic or Co-development PartnerJoint venture partnership for Gufunes waterfront competition in Reykjavik, Iceland (won 2022). Both firms based in Rotterdam, Netherlands. Partnership endorsed by Icelandic Architectural Association and Icelandic Landscape architects Association.
• Holm & Grut Arkitekter / Holm & Grut arkitekterminorStrategic or Co-development PartnerCollaboration on Holmbladsgade Culture House and Keflavik Airport projects. Local Danish architectural partnership providing project support.
• EFLA VerkfræðistofaminorImplementation/ SI/ Consulting PartnerEngineering consultation on Visitor Centre project in Borgarfjörður Eystri. EFLA provides engineering services for the completed tourist facility.
• ISC IngeniørerminorImplementation/ SI/ Consulting PartnerEngineering collaboration on Holmbladsgade Culture House project in Copenhagen.
• ArupmajorImplementation/ SI/ Consulting PartnerInternational engineering consultancy collaboration on Hof Concert Hall project in Akureyri, Iceland. Arup provides acoustic and engineering expertise.
• Carsten E. Holgaard architectsminorStrategic or Co-development PartnerCollaboration on Government Building competition in Reykjavik and kindergarten competition in Seltjarnarnes.
• NFT arkitekterminorStrategic or Co-development PartnerCollaboration on Villa Berlin project - Icelandic Ministry of Foreign Affairs ambassador residence.
• KeopsminorImplementation/ SI/ Consulting PartnerEngineering collaboration on Patio Houses senior housing project in Hørsholm, Denmark.
• Buro HappoldmajorImplementation/ SI/ Consulting PartnerInternational engineering consultancy collaboration on Copenhagen Business School transformation project. Buro Happold provides engineering and technical expertise.
• Thomas Allan NielsenminorImplementation/ SI/ Consulting PartnerCollaborated on Sports Club project and Sports Canopy projects. Provides specialist sports facility design expertise.
• Pia StautzminorImplementation/ SI/ Consulting PartnerLighting architect collaboration on Sports Canopy project in Ishøj, Denmark.

Scale indicators2 records

Recent moves5 records

Expansion highlights4 records

Broad incumbents

• 3XN: 3XN is a larger established Danish architecture firm with overlapping cultural, educational, and public building portfolios; serves as a broad incumbent comparable for the same competition briefs and public client relationships in Denmark.
• Henning Larsen: Henning Larsen is a major Danish architecture firm with extensive cultural, public, and master planning portfolios and a strong Mies van der Rohe Award track record; serves as a broad incumbent comparable for premium Nordic public sector commissions.
• BIG (Bjarke Ingels Group): BIG is a globally scaled Danish architecture firm originating from a similarly small competition-driven foundation; relevant as a broad incumbent comparable for understanding the trajectory from Danish boutique to international scale practice.

Direct peers

• Cobe: Cobe is a Copenhagen-based architecture firm of comparable boutique scale, also founded by architect-led partners, with similar competition-driven project acquisition and a portfolio spanning public, cultural, and master planning work in the Nordics.
• Dorte Mandrup: Dorte Mandrup Arkitekter is a Copenhagen-based boutique practice of similar size and ethos, focused on award-winning cultural, public, and landscape-integrated architecture across the Nordic region, with comparable Mies van der Rohe Award exposure.
• Tham & Videgård Arkitekter: Tham & Videgård is a Stockholm-based architecture firm of similar boutique scale and design philosophy, with comparable competition win track records in cultural and public architecture across Scandinavia.
• Schmidt Hammer Lassen Architects: Schmidt Hammer Lassen is a Danish architecture firm historically anchored by named founding architects, with similar cultural, educational, and public building portfolios, and a comparable competition win profile in the Nordics.
• Snøhetta: Snøhetta is a Norwegian-founded architecture practice with a comparable cross-Nordic, competition-driven business model and similar cultural/civic typology focus, though at significantly larger scale. Operates as a relevant comparable for cross-Nordic brand positioning.
• White Arkitekter: White Arkitekter is a Swedish-Nordic architecture firm with comparable cultural, educational, and public sector competition profiles, operating across multiple Nordic countries with a similar partner-driven practice model.

Others

• Teikn Architects: Teikn is the Icelandic architectural partner firm collaborating with Andersen & Sigurdsson on most Icelandic projects; included as an adjacent ecosystem peer illustrating the local delivery counterpart for cross-Nordic practice.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat3 records

Key risks6 records

Key highlights7 records

Customer concentration

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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 Andersen & Sigurdsson Architects