Studio Lon

What Studio Lon does

Studio Lon AS is a privately-held architectural practice founded and co-owned by Ane Sønderaal Tolfsen and Jens Herman Næss, operating from a co-working space in the Gamlebyen (Old Town) district of Oslo, Norway. The firm provides full-service architectural design across the project lifecycle—from schematic design, feasibility studies, and zoning plans through detail/construction documents and construction phase oversight—covering projects at all scales from small residential infill (120 m² apartments) to large urban developments (14,000 m² housing tower feasibility studies). Its core competencies center on site-specific residential architecture integrating local traditions with clear geometries, passive-house standard design, timber construction, and renewable energy integration (solar panels, geothermal heating), with particular specialization in urban development, ground-floor activation, and transformation/renovation of existing buildings including heritage-protected sites.

The business model is a traditional professional services partnership: fees are negotiated project-by-project based on scope, complexity, and phase, with no publicly disclosed pricing. Revenue derives from two streams—architectural services and planning consulting—delivered to a mix of real estate developers, property owners, construction firms, homeowner associations (HOAs), and private clients across Norway and select sites in Denmark. Distribution is entirely direct, relying on portfolio visibility, professional network referrals (including NAL membership and academic connections at AHO), and repeat clients. The firm holds Sentral godkjenning (Norwegian central approval) for architecture design in tiltaksklasse 3 and applicant role in tiltaksklasse 2, a regulatory certification required for large-scale Norwegian projects.

Name

Studio Lon

Legal name

Studio Lon AS

Website

https://studiolon.no

Company type

Private

Founded year

2019

Operating status

Operating

Headcount range

1–10 employees

Short description

Studio Lon AS is an Oslo-based architectural practice founded by two former Jarmund/Vigsnæs architects, providing full-service design from feasibility to construction oversight for residential, urban development, and transformation projects across Norway and Denmark.

Ownership category

akta.pro rank

Product category

Architectural Services

NAICS

Architectural Services (54131), Architectural Services (541310), Interior Design Services (54141), Landscape Architectural Services (54132)

akta.pro primary industry

Architectural Design Services (BPAHAKAA)

akta.pro secondary industries

Architectural Reconfiguration & Structural Alterations (HSAPAEAB), Landscape Architecture & Site Design (BPAHAKAC)

Keywords

• Architectural design services
• Residential architecture
• Urban development planning
• Building transformation services
• Housing design

Headquarters

HQ city

Oslo

HQ country

Norway

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales, Others

Revenue model

1. Architectural Services: Full-service architectural practice offering services across all project phases: schematic designs, sketch projects, programming, application work, preliminary designs, detail phase/construction documents, spec sheets, and construction phase oversight. Also provides zoning plans, Architectural Due-Diligence reports, feasibility studies, and early-phase consulting.
2. Planning Consulting: Planning consultant services including architectural planning and consultation for development projects. Studio Lon acts as both architect and planning consultant on projects.

Distribution channels2 records

Marketing channels1 record

Core offering

Studio Lon AS is an Oslo-based architectural practice offering full-service design across all project phases—from schematic design, sketch projects, programming, and application work through preliminary design, detailed construction documents, spec sheets, and construction phase oversight. The studio specializes in housing and residential architecture (apartments, houses, cabins, housing developments), urban development and planning (zoning plans, feasibility studies, mixed-use projects), and transformation/rehabilitation of existing buildings. Services also include Architectural Due-Diligence reports and the firm holds Sentral godkjenning (central approval) for prosjektering av Arkitektur i tiltaksklasse 3.

Product overview

Studio Lon AS is an architectural practice based in Oslo, Norway that offers comprehensive architectural services at all scales. The firm specializes in new construction and transformation projects, providing services from schematic designs and sketch projects through programming, application work, preliminary designs, detail phase, construction documents, spec sheets, and construction phase oversight. Their core offerings include housing and residential architecture (apartments, houses, cabins, housing developments), urban development and planning, feasibility studies, early-phase services, architectural due-diligence reports, and construction administration. The practice has particular expertise in designing housing and hybrid programs, urban development, and ground floor activation.

Differentiator

Problem solved

Functional benefit

Products and services

• Architectural Design Services

Named customers11 records

Segments3 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

Six partnerships are on record, tiered minor and core.

• Jæger Brudvik ArkitekterminorOthersCo-working space partner sharing Studio Lon's office in Gamlebyen, Oslo. Jæger Brudvik Arkitekter is a fellow architecture practice in the shared studio space.
• Arkitekt Ingrid Mathilde Steen-Chabert ASminorOthersCo-working space partner sharing Studio Lon's office in Gamlebyen, Oslo. Independent architecture practice operating from the shared studio space.
• SagvoldenminorOthersCo-working space partner sharing Studio Lon's office in Gamlebyen, Oslo. Operating from the shared studio location.
• Kastler Skjeseth ArchitectscoreStrategic or Co-development PartnerProject collaborator on the Hovedgata Tvedestrand mixed-use development (057_22 project). Kastler Skjeseth Architects worked jointly with Studio Lon on this housing and commercial development in a heritage-protected town center.
• Vatn ArchitectureminorOthersPast collaborator on architectural projects. Listed as a collaborator/past project partner.
• Einar Jarmund & Co ArkitekterminorOthersPast employer of founding partners. Both Ane Sønderaal Tolfsen and Jens Herman Næss worked at Jarmund/Vigsnæs AS Architects (now Einar Jarmund & Co) before founding Studio Lon.

Scale indicators2 records

Recent moves5 records

Expansion highlights4 records

Direct peers

• DARK Arkitekter: Norwegian architectural practice with strong housing and urban development focus, particularly in Oslo. Comparable in scale, project types, and emphasis on site-specific Nordic design.
• Mad Arkitekter: Norwegian architectural practice with strong housing and urban development focus, including social sustainability and infill projects. Comparable in scale, location, and project typology to Studio Lon, with similar academic and AHO connections.
• Jarmund/Vigsnæs AS Architects (now Einar Jarmund & Co): Oslo-based architectural practice where both Studio Lon founders worked for 8-10 years. Closely aligned in focus on housing, urban development, and site-specific Norwegian architecture, with comparable scale and academic ties to AHO.
• Arkitema: Scandinavian (Danish-owned) architecture firm with offices across the Nordics, focusing on sustainable housing, urban development, and transformation projects. Directly competes for the same Nordic developer client base and shares Studio Lon's emphasis on energy-efficient design.

Broad incumbents

• White Arkitekter: Major Scandinavian architecture firm with extensive Nordic housing and urban development portfolio, including sustainable design expertise. Operates at a larger scale but competes for similar developer and municipal clients.
• LINK Arkitektur: Nordic architecture firm with strong presence in Norway and across Scandinavia, focusing on housing, urban planning, and sustainable design. Competes for similar developer-led commissions at a larger scale.
• Henning Larsen: Danish architecture firm (now part of Rambøll) with strong portfolio in housing, urban development, and sustainability-driven design across Scandinavia. Larger and more established, but overlaps in target clients and design philosophy.
• Snøhetta: Norwegian-founded, globally recognized architecture and design firm with strong sustainability and landscape integration practice. Operates at much larger scale and broader project scope, but competes for high-profile Norwegian cultural and urban commissions.

Emerging players

• Haptic Architects: Oslo-based architecture practice with comparable scale and focus on housing, urban regeneration, and site-specific design. Shares Studio Lon's academic connections and developer client base in Norway.

Regional players

• Kjellander Sjöberg: Stockholm-based architecture practice with comparable scale and focus on social housing, urban development, and contextual Scandinavian design. Operates in Sweden rather than directly competing in Norway, but shares design philosophy and Nordic developer client base.

Market position

Strengths5 records

Weaknesses4 records

Competitive moat3 records

Key risks5 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/studio-lon-as

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 Studio Lon