Thorendahl AS

What Thorendahl AS does

Thorendahl AS is a Norwegian private limited company founded in 1971, headquartered in Oslo, and operating as a specialized facade and building rehabilitation contractor. The company delivers four core service lines: concrete rehabilitation, facade rehabilitation, balcony rehabilitation and construction, and antiquarian (heritage) rehabilitation. Its antiquarian practice restores historic and listed buildings to their original appearance using archival research, historical documentation analysis, and traditional handcraft techniques, working in coordination with Norwegian cultural heritage authorities such as Byantikvar and Riksantikvar.

The company serves property owners, facility managers, government institutions, and heritage building owners in the Oslo region. Its service portfolio includes high-profile references such as Oslo Rådhus (Oslo City Hall), Universitetet i Oslo (University of Oslo), Sjømannskolen (The Sailors' School), Holmenkollen Park Hotel, and residential/commercial buildings including Urtegata 48 and Majorstuhuset. All services are delivered through Thorendahl's own in-house workforce of masons, painters, and carpenters, with no third-party subcontracting.

Thorendahl operates as a project-based B2B contractor with a referral- and reputation-driven go-to-market motion. Revenue is generated through professional services contracts, with pricing determined on a project-by-project basis. The company is a subsidiary of AF Håndverk, which sits within the AF Gruppen conglomerate, benefiting from group-level oversight, cross-company referrals, and consolidated Transparency Act (Åpenhetsloven) compliance reporting. Geographic operations are concentrated in Oslo and surrounding areas, with no evidence of expansion beyond the region.

Name

Thorendahl AS

Legal name

Thorendahl AS

Website

https://thorendahl.no

Company type

Private

Founded year

1971

Operating status

Operating

Headcount range

11–50 employees

Short description

Thorendahl AS is an Oslo-based facade and building rehabilitation contractor, founded in 1971, specializing in concrete repair, facade restoration, balcony work, and antiquarian heritage rehabilitation for property owners, government institutions, and heritage building clients in the Oslo region.

Ownership category

akta.pro rank

Product category

Building Rehabilitation Services

NAICS

Masonry Contractors (23814), Foundation, Structure, and Building Exterior Contractors (2381)

SIC

Construction - Special Trade Contractors (1700)

akta.pro primary industry

Stone Masonry Repair & Restoration (HSAGALAJ)

akta.pro secondary industries

Brick & Block Repair / Replacement (HSAGALAI), Masonry Repointing & Mortar Joint Repair (HSAGALAH), Chimney, Parapet & Roofline Masonry Repair (HSAPAKAL), Structural Wood Repair & Framing (Studs, Joists, Subfloor Patching) (HSAGABAF)

Keywords

• Facade rehabilitation services
• Concrete rehabilitation services
• Heritage building restoration
• Balcony construction services
• Antiquarian rehabilitation

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, Technology or R&D, Supply Chain

Revenue model

1. Rehabilitation Services: Thorendahl generates revenue through providing professional rehabilitation services for facades, concrete structures, balconies, and heritage buildings. Revenue is project-based and derived from contracts with property owners, government entities, and commercial building operators.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels5 records

Core offering

Thorendahl AS is a building facade rehabilitation contractor that delivers four core services: concrete rehabilitation, facade rehabilitation, balcony rehabilitation and construction, and antiquarian (heritage) rehabilitation. All work is performed by the company's own in-house team of masons, painters, and carpenters in the Oslo region, serving property owners, facility managers, government institutions, and heritage building owners. The company combines modern construction techniques with antiquarian craftsmanship and archival research to restore both contemporary and heritage-listed buildings.

Product overview

Thorendahl AS is a specialized construction and rehabilitation company offering a portfolio of building restoration services. The company operates as a single unified service offering delivered through its own team of masons, painters, and carpenters. The core service portfolio consists of four main offerings: Betongrehabilitering (concrete rehabilitation), Fasaderehabilitering (facade rehabilitation), Balkong (balcony rehabilitation and construction), and Antikvarisk rehabilitering (antiquarian/historic rehabilitation). These services are designed to preserve both the economic and cultural value of properties, with the company emphasizing its expertise in traditional craftsmanship combined with antiquarian principles for heritage buildings.

Differentiator

Problem solved

Functional benefit

Products and services

• Concrete Rehabilitation (Betongrehabilitering) Comprehensive concrete rehabilitation services using both modern and antiquarian techniques to ensure proper maintenance and treatment of buildings, for property owners and managers of residential and commercial buildings in the Oslo region.
• Facade Rehabilitation (Fasaderehabilitering) Facade rehabilitation services including painting, masonry, and carpentry work for residential and commercial buildings. Backed by an extensive project portfolio in traditional rehabilitation since 1971, delivered to property owners, facility managers, and government institutions in the Oslo region.
• Balcony Rehabilitation and Construction (Balkong) Balcony rehabilitation on existing buildings with focus on safety and structural integrity, as well as balcony extensions and construction of new balconies for property owners and managers in the Oslo region.
• Antiquarian Rehabilitation (Antikvarisk rehabilitering) Antiquarian rehabilitation services for historic and heritage buildings, restoring properties to their original appearance using archival research, historical documentation, and antiquarian craftsmanship techniques, with coordination of cultural heritage authorities. References include Oslo Rådhus, University of Oslo, Sjømannskolen, and Holmenkollen Park Hotel.

Named customers7 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

Feature2 records

Partnerships

Two partnerships are on record, tiered core.

• AF Håndverk (Parent Company)coreOthersThorendahl AS is a subsidiary under AF Håndverk, which is part of AF Gruppen. AF Håndverk functions as an umbrella organization for multiple specialized trade companies in the Oslo region. Thorendahl operates as one of the group's facade rehabilitation specialists.
• AF GruppencoreOthersAF Gruppen is the parent company of AF Håndverk under which Thorendahl operates. The group manages transparency reporting (Åpenhetsloven) for all subsidiary companies including Thorendahl.

Scale indicators3 records

Recent moves5 records

Broad incumbents

• Skanska AB: Major Nordic-based construction and project developer with Norwegian operations covering commercial building and infrastructure, including renovation and rehabilitation scopes overlapping Thorendahl's market.
• NCC AB: Swedish-headquartered construction group with Norwegian building construction and renovation activities, providing a comparable end-to-end alternative for larger rehabilitation tenders in the Oslo region.
• Veidekke ASA: Large publicly listed Norwegian contractor active in building, civil, and rehabilitation work, including facade and concrete restoration, that competes for the same institutional and private tenders as Thorendahl.
• Peab AB: Nordic construction and civil engineering company operating across Norway with capabilities in renovation and rebuilding, competing with Thorendahl on larger residential and commercial rehabilitation contracts.
• AF Gruppen: Ultimate parent conglomerate of Thorendahl via AF Håndverk. A publicly listed Norwegian construction and property group offering overlapping civil, building, and rehabilitation services across Norway.

Direct peers

• AF Håndverk: Parent umbrella organization for specialty trade companies in the Oslo region, including Thorendahl. Operates the same in-house craft model across multiple trades and shares customer relationships and project pipelines.
• Kirkestuen AS: Sister company under AF Håndverk operating in the Oslo specialty trades space, sharing customer overlap and cross-referral potential with Thorendahl.
• Betong og tre: AF Håndverk-affiliated contractor combining concrete and carpentry trades, serving similar Oslo-based B2B customers and capable of delivering complementary scopes on the same projects as Thorendahl.
• Lasse Holst AS: Another AF Håndverk subsidiary focused on interior finishing and specialty trades for residential and commercial buildings in the Oslo region, offering comparable B2B contractor economics.

Market position

Strengths4 records

Weaknesses5 records

Competitive moat4 records

Key risks5 records

Key highlights5 records

Customer concentration

• Facebookfacebook.com/Thorendahlas
• LinkedInlinkedin.com/company/thorendahl-as
• Instagraminstagram.com/thorendahlas

Revenue estimate

Valuation estimate

Number of profiles

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 Thorendahl AS