Karl Knudsen
Karl Knudsen AS is a Trondheim-based Norwegian consulting engineering firm, founded in 1966 and part of Rejlers since 2023, providing project administration and building technical engineering services to public authorities, property developers, housing cooperatives, and industrial clients in Central Norway.
- Company typePrivate
- Founded1966
- HeadquartersTrondheim, Norway
- Headcount11–50
- GTM typeB2B
- OfferingServices
What Karl Knudsen does
Karl Knudsen AS is a Norwegian consulting engineering firm headquartered in Trondheim, founded in 1966 and operating since September 29, 2023 as a wholly-owned subsidiary of Rejlers AS under the brand "Karl Knudsen Part of Rejlers." The firm delivers two core service lines: Prosjektstyring (project administration and management) and Prosjektering (building technical engineering), serving private developers, public authorities, housing cooperatives, and industrial clients across Central Norway (Midt-Norge). Notable client engagements include SalMar ASA, Lerøy Midt AS, Tine SA, Siemens Subsea Trondheim, NorgesGruppen Eiendom, Trondheim Kommune, and Studentersamfundet i Trondheim.
Technically, Karl Knudsen holds central approval (sentral godkjenning) in class 3 from the Norwegian Directorate for Building Quality (Direktoratet for byggkvalitet), granting it responsibility rights as responsible designer and controller for buildings and installations in tiltaksklasse 3. Engineering work is performed using industry-standard CAD/BIM tooling including Revit Structures, Tekla Structures, AutoCAD, FEM-design calculation programs, and Solibri Model Checker for interdisciplinary collision control. Post-acquisition, the firm gains access to Rejlers Buildings' additional capabilities including HVAC (RIV), electrical engineering (RIE), energy consulting, automation, ITB, and Smart Buildings services.
Karl Knudsen operates a project-based professional services model with no publicly disclosed pricing. Revenue is generated through consulting fees for project management, construction management, and structural engineering engagements, predominantly with repeat clients (flergangsbyggherrer) across both public and private sectors. At the time of Rejlers' acquisition, the firm reported revenue of 45 MNOK with good profitability and 23 employees; headcount has since grown to approximately 24, including 13 civil engineers, 9 engineers, an office manager, and one administrative employee. Distribution is direct enterprise engagement with no intermediaries, and the firm is a member of RIF (Rådgivende Ingeniørers Forening) and certified under Miljøfyrtårn.
Karl Knudsen firmographics
Firmographics- Name
- Karl Knudsen
- Legal name
- Karl Knudsen AS
- Website
- https://kkn.no
- Company type
- Private
- Founded year
- 1966
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Short description
- Karl Knudsen AS is a Trondheim-based Norwegian consulting engineering firm, founded in 1966 and part of Rejlers since 2023, providing project administration and building technical engineering services to public authorities, property developers, housing cooperatives, and industrial clients in Central Norway.
- Ownership category
- akta.pro rank
Karl Knudsen industry classification
Industry- Product category
- Construction Engineering Consulting
- NAICS
- Engineering Services (541330), Architectural, Engineering, and Related Services (5413)
- SIC
- Services-Engineering Services (8711), Services-Engineering, Accounting, Research, Management (8700)
- akta.pro primary industry
- Construction Engineering & Constructability Consulting (BPAHAIAN)
- akta.pro secondary industries
- Civil & Structural Engineering Consulting (BPAHAIAA), Design-Build / EPC General Contracting (IMAFAAAD)
Keywords
Where Karl Knudsen is headquartered
LocationHeadquarters
- HQ city
- Trondheim
- HQ country
- Norway
- HQ region
- Europe
Offices1 record
Markets served
Karl Knudsen business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Personnel, Operations, Marketing or Sales, Technology or R&D, Infrastructure
Revenue model
- Professional Consulting Services: Provides project administration and building technical engineering services to private and public clients. Revenue generated through consulting fees for project management, construction management, and structural engineering.
- Engineering Design Services: Building technical engineering including structural calculations, construction drawings, reinforcement drawings, and quantity calculations. Billed as one-time project fees or as part of total project contracts.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Other | Multi-year contract | Project-based consulting services |
Go-to-market motion2 records
Distribution channels1 record
Marketing channels3 records
Karl Knudsen product offering
Product offeringCore offering
Karl Knudsen AS delivers building and construction consulting services in two core areas: Prosjektstyring (project administration/management) including construction management, HSE coordination, owner's representation, and project leadership; and Prosjektering (building technical engineering) including structural calculations, design, working drawings, and reinforcement drawings for concrete, steel, and timber constructions. The firm holds central approval in class 3 from the Norwegian Directorate for Building Quality, enabling it to act as responsible designer and controller for buildings and installations.
Product overview
Karl Knudsen AS operates as a consulting engineering firm providing two core service areas: Prosjektstyring (Project Management/Administration) and Prosjektering (Building Technical Engineering). The company, now part of Rejlers Buildings division following acquisition in September 2023, offers additional services through Rejlers Buildings including Smart Buildings, HVAC (RIV), and electrical (RIE) engineering. Services are delivered through modules for construction management, HSE coordination, structural engineering (RIB), energy calculations, and owner's representation. The company also provides specialized Borettslag (housing cooperative) services. No software product integrations or API offerings were identified in the source data.
Differentiator
Problem solved
Functional benefit
Products and services
- Prosjektstyring (Project Administration / Project Management) Project administration services for building and infrastructure projects, including construction management, HSE coordination, project leadership, owner's representation (byggherreombud), project development, and regulatory work. Delivered to both private and public clients in Midt-Norge and other parts of Norway.
- Prosjektering (Building Technical Engineering) Building technical engineering services including structural calculations, design of concrete, steel, and timber constructions, working drawings, reinforcement drawings, cost estimates, and construction-phase follow-up. The department holds central approval (sentral godkjenning) in class 3 from the Norwegian Directorate for Building Quality, granting responsibility rights as responsible designer and responsible controller for buildings and installations.
- Borettslag Services (Housing Cooperative Services)
- Total Project Engineering (Totalentreprise prosjektering)
- Rejlers Buildings Services (HVAC, Electrical, Smart Buildings) Additional services offered through Rejlers Buildings division including Smart Buildings, HVAC engineering (RIV), and electrical engineering (RIE) services such as energy consulting, automation, ITB, and REVIT/AutoCAD design capabilities. Made available to Karl Knudsen clients following the September 2023 Rejlers acquisition.
Quantifiable outcome
- Moholt 50|50 project - Europe's largest mass timber construction project, awarded Årets trebyggeri and Varmepumpeprisen 2017
- +1 more outcomes
Companies that use Karl Knudsen
Customer profileNamed customers9 records
Segments4 records
Ideal customer profiles4 records
Karl Knudsen technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature3 records
Karl Knudsen partnerships and signals
Strategic signalPartnerships
One partnership is on record.
- Rejlers AScoreRejlers AS acquired Karl Knudsen AS effective September 29, 2023. Karl Knudsen now operates as 'Karl Knudsen Part of Rejlers' and is part of Rejlers' Buildings division. The acquisition establishes Rejlers in a strategically important position in Trondheim, enabling the combined companies to deliver a more complete and interdisciplinary service range to customers in the building and construction sector in the region.
Scale indicators4 records
Recent moves1 record
Expansion highlights5 records
Karl Knudsen competitors and assessment
Company assessmentDirect peers
- Multiconsult: Major Norwegian engineering consultancy competing for public-sector building, infrastructure, and industrial projects. Highly comparable service mix including structural engineering, project management, and construction oversight.
- Sweco: Nordic-headquartered engineering consultancy with a significant Norwegian presence, competing for the same building, structural, and project management engagements that Karl Knudsen serves.
- Asplan Viak: Norwegian consultancy with strong regional offices and broad building, civil, and planning capabilities, directly competing with Karl Knudsen for municipal, housing cooperative, and developer-driven projects.
- Norconsult: Norway's largest multidisciplinary engineering consultancy, with a substantial Trondheim office (former employer of Karl Knudsen hire Yoana Topalova). Direct competitor for the same public and private building, infrastructure, and industrial engineering mandates in Central Norway.
Others
- Trøndelag Entreprenør / local contractor ecosystem: Local Trondheim-area construction contractors and trades that Karl Knudsen coordinates with on borettslag, school, and commercial builds; relevant ecosystem participants rather than direct consulting competitors.
Broad incumbents
- AFRY (ÅF Pöyry): Nordic engineering and design consultancy with operations across Norway, providing building, industrial, and infrastructure services that overlap with Karl Knudsen's portfolio.
- COWI: International engineering consultancy with substantial Norwegian operations, providing structural, building, and infrastructure engineering overlapping with Karl Knudsen's offerings at a much larger scale.
- WSP Norge: Global engineering consultancy with Norwegian offices providing building structures, project management, and multidisciplinary design services that compete with Karl Knudsen's portfolio.
- Rambøll (Ramboll): Global engineering, architecture, and consultancy firm with Norwegian offices, overlapping with Karl Knudsen on building design, structural engineering, and project management services.
Regional players
- Hjellnes Consult: Norwegian engineering consultancy focused on buildings, structures, and project management, with a comparable service offering to Karl Knudsen though operating primarily in the Oslo region rather than Midt-Norge.
Market position
Strengths4 records
Weaknesses4 records
Competitive moat4 records
Key risks5 records
Key highlights6 records
Customer concentration
Karl Knudsen social profiles
Digital presenceKarl Knudsen financial estimates
Financial estimateRevenue estimate
Valuation estimate
Karl Knudsen leadership team
Management profileNumber of profiles
Profiles9 records
Karl Knudsen funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Karl Knudsen M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Karl Knudsen
What does Karl Knudsen do?
Karl Knudsen AS delivers building and construction consulting services in two core areas: Prosjektstyring (project administration/management) including construction management, HSE coordination, owner's representation, and project leadership; and Prosjektering (building technical engineering) including structural calculations, design, working drawings, and reinforcement drawings for concrete, steel, and timber constructions. The firm holds central approval in class 3 from the Norwegian Directorate for Building Quality, enabling it to act as responsible designer and controller for buildings and installations.
Is Karl Knudsen a public or private company?
Karl Knudsen is a private company. It is classified as corporate owned and is currently operating.
When was Karl Knudsen founded?
Karl Knudsen was founded in 1966. It employs 11 to 50 people.
Where is Karl Knudsen based?
Karl Knudsen is headquartered in Trondheim, Norway, in the Europe region.
How does Karl Knudsen make money?
Two revenue lines are on record. Professional Consulting Services are the primary driver. The others are engineering Design Services.
Who are Karl Knudsen's main competitors?
Direct peers on record are Multiconsult, Sweco, Asplan Viak and Norconsult. Trøndelag Entreprenør / local contractor ecosystem is listed as an others. Broad incumbents are AFRY (ÅF Pöyry), COWI, WSP Norge and Rambøll (Ramboll). Hjellnes Consult is listed as a regional player.
Does Karl Knudsen have an API?
No public API is recorded for Karl Knudsen.
What industry is Karl Knudsen in?
Karl Knudsen's product category is Construction Engineering Consulting. Its primary akta.pro industry code is BPAHAIAN, Construction Engineering & Constructability Consulting, with a secondary code of BPAHAIAA, Civil & Structural Engineering Consulting. Its NAICS code is 541330 and its SIC code is 8711.