OASA AS

What OASA AS does

OASA AS, operating as OASA Entreprenør AS, is a Norwegian private building consultancy and contractor founded in 2019 and headquartered in Vestfossen. The company serves the residential property market with six integrated service lines: taksering (valuation), third-party control and pressure testing, energy calculation and consulting, building case management and design, project and construction management, and general contractor services. Its client base consists of homeowners, residential developers, and individuals seeking certified inspection, energy documentation, and contracting services for Norwegian residential projects.

The firm operates on a fee-for-service model, charging per engagement for valuation, certification, and contracting work. Service delivery is anchored by licensed Norwegian construction credentials — Mester, Sentral Godkjenning, and BMTF — which are mandatory for executing third-party controls, energy calculations, and approved building works. Key personnel include Sondre Hansson (CEO) and David Strubreiter, who together hold the certified competencies required to sign off on regulated tasks. The business model requires no proprietary technology stack beyond standard office and document tools.

The company is differentiated by its bundled offering, allowing residential clients to procure taksering, energy certification, project design, and physical construction from a single accountable provider. Geographic reach is anchored in Vestfossen for contracting services, with nationwide delivery available for simplified loan-related taksering. The firm is small (1–10 employees), privately held, and does not disclose funding, revenue, or partnership history. Source material lists no AI/ML capabilities, no patents, and no external investors.

Name

OASA AS

Legal name

OASA Entreprenør AS

Website

https://oasa.no

Company type

Private

Founded year

2019

Operating status

Operating

Headcount range

1–10 employees

Short description

OASA AS is a Norwegian building consultancy and contractor founded in 2019, serving residential property owners with integrated taksering, energy certification, third-party control, and construction services from its Vestfossen base.

Ownership category

akta.pro rank

Product category

Building Consultancy and Construction Services

NAICS

Architectural, Engineering, and Related Services (5413), Offices of Real Estate Appraisers (53132)

SIC

Services-Engineering Services (8711), Services-To Dwellings & Other Buildings (7340)

akta.pro primary industry

ADU Project Management & General Contracting (HSAPAMAO)

akta.pro secondary industry

Insurance Replacement Cost & Damage/Loss Valuation (BPAJAKAL)

Keywords

• Building consultancy services
• Construction contractor services
• Property valuation services
• Third-party building control
• Residential construction Norway

Headquarters

HQ city

Vestfossen

HQ country

Norway

HQ region

Europe

Offices1 record

Markets served

GTM type

B2C

Offering type

Services

Cost components

Personnel, Operations, Supply Chain, Marketing or Sales, Technology or R&D

Revenue model

1. Professional Consulting Services: Fee-for-service model providing building consultancy, third-party control, pressure testing, energy calculation, and project management services to residential property owners and building industry clients.
2. Contractor Services: Construction and renovation services including new construction, additions, rehabilitation, bathroom renovation, partial repairs, remediation, and concrete/foundation work on residential properties.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels3 records

Core offering

OASA Entreprenør provides consulting and contractor services for residential building and renovation projects in Norway. The company delivers property valuation, third-party building control, airtightness pressure testing with thermography, energy calculation and advisory, building permit assistance, project management, and full contractor services for new construction, renovation, bathroom work, and concrete/foundation projects.

Product overview

OASA Entreprenør operates as a unified construction consulting and contractor service provider serving the Norwegian building and construction industry. The company offers an integrated suite of six core service lines: Taksering (property valuation and damage assessment), Tredjepartskontroll og trykktest (third-party control and pressure testing with thermography), Energiberegning og rådgivning (energy calculation and advisory services including energy labeling), Byggesak og prosjektering (building permits and technical design), Prosjekt- og byggeledelse (project and construction management), and Entreprenørtjenester (full contractor services for new builds, renovations, bathrooms, remediation, and concrete work). The services are designed to support clients from planning through completion, with the consulting services and contractor operations working in coordination to provide end-to-end project delivery.

Differentiator

Problem solved

Functional benefit

Products and services

• Taksering (Property Valuation and Damage Assessment) Property valuation and appraisal services including damage assessment, complaint documentation, simplified value/mortgage valuation, and condition assessment for property transactions. Target customers are residential property owners for property sales, purchases, and refinancing.
• Tredjepartskontroll og trykktest (Third-Party Control and Pressure Testing) Independent third-party control of wet rooms and air tightness testing combined with thermographic imaging to detect leaks and insulation issues. Required by Norwegian building regulations for new buildings and permit-required modifications.
• Energiberegning og rådgivning (Energy Calculation and Advisory) Energy consumption analysis, energy labeling, assessment of energy-saving measures, and advisory services for energy efficiency improvements in residential properties. Eligible customers may access up to NOK 7,500 in government subsidies for recommended improvements.
• Byggesak og prosjektering (Building Permits and Technical Design) Building permit application assistance and technical design services spanning structural engineering, building physics, fire safety, acoustics, and architectural design in compliance class 1. Target customers are property owners undertaking new construction or permit-required modifications.
• Prosjekt- og byggeledelse (Project and Construction Management) Project management and construction management services including cost calculation, quantity estimation, contractor coordination, and quality assurance throughout the building process. Early engagement enables material pricing benefits and full responsibility for design, application, and execution.
• Entreprenørtjenester (Contractor Services) Full contractor services including new construction and extensions, rehabilitation and restoration, bathroom construction and partial repairs, remediation and indoor climate solutions, and concrete and foundation work for residential properties. Bathroom renovations typically take 3-6 weeks and range from NOK 140,000 to 250,000.

Quantifiable outcome

• Pressure testing combined with thermography can identify specific air leaks
• +2 more outcomes

Named customers6 records

Segments2 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Scale indicators2 records

Recent moves4 records

Expansion highlights2 records

Broad incumbents

• NCC: One of the largest Nordic construction and real estate companies with Norwegian operations across residential building and infrastructure. Comparable in offering contractor services and project management for residential clients.
• AF Gruppen: Large Norwegian construction group with civil engineering, building, and property development operations. Comparable as a broad Norwegian construction and engineering services provider overlapping with OASA's contractor and project management activities.
• Backe Bygg: Norwegian construction contractor with residential and commercial building focus. Comparable in offering contractor services for renovation and new builds across the Norwegian market.
• Mesta: Norwegian construction and infrastructure company with civil engineering and building operations. Overlaps with OASA in construction and engineering services for the Norwegian residential and building sector.
• Skanska Norge: Norwegian arm of international contractor Skanska, active in residential and commercial construction. Overlaps with OASA in residential renovation, project execution, and building permits/design services.
• Veidekke: Major Norwegian construction contractor with a dedicated residential division. While much larger than OASA, Veidekke offers overlapping capabilities in residential construction, renovation, and project management.
• Betonmast: Norwegian construction company (now part of AF Gruppen) with residential building and renovation operations. Comparable in Norwegian residential construction services and project delivery.
• HENT: Norwegian general contractor with residential and commercial building projects. Operates broadly in the same Norwegian construction market as OASA, with overlapping renovation and new-build capabilities.
• Norconsult: Largest Norwegian engineering and architecture consultancy. Comparable in offering building permits, technical design, and project management services for residential clients, though at vastly greater scale.
• Consto: Norwegian construction contractor with residential building and renovation capabilities. Operates in the same Norwegian residential construction market as OASA, with contractor and project management overlap.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat3 records

Key risks6 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/oasa-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 OASA AS