KJELLBERGS BYGG I TROSA AB

What KJELLBERGS BYGG I TROSA AB does

Kjellbergs Bygg i Trosa AB is a fourth-generation, family-owned general construction contractor founded in 1908 by Axel Kjellberg in Vagnhärad, Sweden, currently led by Johan Kjellberg (fourth generation since 2006). The company operates as a totalentreprenör (general contractor) delivering turnkey new construction, renovation, and conversion projects spanning wood and concrete work, tiling, extensions, property service, and building service. It serves a tri-segment customer base in Södermanland and Stockholm: municipalities and county councils (Trosa kommun, Landstinget Sörmland, Statens fastighetsverk, Telge Inköp), corporate clients (Scania, Skanska, Statkraft Värme, Nyköpingshem, Slottsvakten, Derome), and private individuals. The corporate registration (556733-6689) lists the legal entity as Kjellbergs Bygg AB, a private Swedish limited company with no institutional investors, parent company, or external ownership disclosed.

Revenue is generated through project-based fixed-price (fast pris) and cost-plus (löpande räkning) contracts ranging from approximately 2 Mkr to over 100 Mkr SEK per project, with notable engagements including Skärlagsparken (~100 Mkr), Stadshotellets SPA (~19 Mkr), Alphyddan (~10 Mkr), Skärlagsskolan (~8.8 Mkr), and Hedebyhallen (~4.8 Mkr). The company employs 46 staff across two offices — Trosa headquarters (Redskapsvägen 1) and Nyköping (Gasverksvägen 5) — and operates a curated subcontractor ecosystem covering electrical, HVAC, plumbing, masonry, carpentry, glass, excavation, and materials supply. Sales are direct and relationship-led with no resellers or marketplace channels; project sourcing depends on long-term client relationships, regional reputation, public-sector tender access, and membership in Byggföretagen.

Name

KJELLBERGS BYGG I TROSA AB

Legal name

Kjellbergs Bygg AB

Website

https://kjellbergsbygg.se

Company type

Private

Founded year

1908

Operating status

Operating

Headcount range

1–10 employees

Short description

Fourth-generation family-owned Swedish general contractor founded in 1908, delivering new construction, renovation, and conversion projects for municipalities, enterprises, and private individuals across Södermanland and Stockholm via 46 staff in Trosa and Nyköping.

Ownership category

akta.pro rank

Headquarters

HQ city

Trosa

HQ country

Sweden

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B and B2C

Offering type

Services

Cost components

Personnel, Supply Chain, Operations, Marketing or Sales, Infrastructure

Revenue model

1. Construction project fees: Revenue generated from fixed-price (fast pris) general contracting and cost-plus (löpande räkning) contracts for new construction, renovation, and conversion projects. Projects range from small private assignments to large municipal and commercial contracts exceeding 100 million SEK.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels6 records

Core offering

Kjellbergs Bygg offers property owners, businesses, municipalities, county councils, and private individuals in Sörmland and Stockholm a complete construction solution for new builds, renovations, and conversion projects. Acting as a general contractor (totalentreprenad), the company takes full responsibility for project quality, timelines, and budgets. Capabilities span wood and concrete construction, renovation and remodeling, extensions, water and fire damage restoration, pipe replacements, tiling, and ongoing property and building services.

Product overview

Kjellbergs Bygg is a construction services company offering a comprehensive range of building services through a single unified offering rather than discrete software products. The core portfolio consists of new construction (nybyggnation) in wood and concrete, renovation and remodeling (renovering och ombyggnation), extensions (tillbyggnader), specialized wood and concrete work (trä- & betongarbeten), tiling services (plattsättning), and property/building maintenance (fastighetsservice och byggservice). The company operates as a general contractor (totalentreprenad) providing turnkey solutions for property owners, businesses, municipalities, and private individuals across Södermanland and Stockholm regions. Services are delivered through their team of 46 employees based in Trosa and Nyköping.

Differentiator

Problem solved

Functional benefit

Products and services

• New Construction (Nybyggnation) General contractor services for new construction of residential and commercial buildings in both wood and concrete, delivered with full project responsibility for quality, timelines, and budgets. Targeted at property owners, businesses, municipalities, and private individuals across Sörmland and Stockholm.
• Renovation and Remodeling (Renovering och ombyggnation) Renovation, remodeling, and reconstruction services including water damage restoration, fire damage repair, and pipe replacements (stambyten). Targeted at property owners, businesses, municipalities, and private individuals across Sörmland and Stockholm.
• Extensions and Additions (Tillbyggnader) Extension and addition construction services to existing buildings for property owners, businesses, and private individuals across Sörmland and Stockholm.
• General Contracting / Turnkey (Totalentreprenad) Complete project responsibility as general contractor, managing quality, timelines, and budget from start to finish, integrating all construction disciplines and vetted subcontractors under single coordination for clients in Sörmland and Stockholm.
• Property Service and Building Service (Fastighetsservice och Byggservice) Ongoing property maintenance and building service operations for property owners and businesses across Sörmland and Stockholm.

Named customers13 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

19 partnerships are on record, tiered minor.

• Seso El ABminorOthersElectrical subcontractor for construction projects.
• HR El ABminorOthersElectrical subcontractor for construction projects.
• Trosa ElminorOthersLocal electrical subcontractor based in Trosa.
• Anders Eriksson's Mureri & Plattsättning ABminorOthersMasonry and tiling subcontractor for construction projects.
• CaverionminorOthersHVAC (heating, ventilation, air conditioning) subcontractor for construction projects in Nyköping.
• Rörfirman J Franzén ABminorOthersPlumbing subcontractor for construction projects.
• IsolarminorOthersGlass/fenestration subcontractor for construction projects.
• Thunmans EntreprenadminorOthersExcavation and civil engineering subcontractor.
• AaltonenminorOthersConstruction-related subcontractor.
• Me Byggplåt ABminorOthersSheet metal and cladding subcontractor.
• Favarent ABminorOthersConstruction and renovation subcontractor.
• CramominorOthersEquipment rental partner for construction equipment and machinery.
• L Nyman VVS i Trosa ABminorOthersLocal HVAC/plumbing contractor based in Trosa.
• SödertäljeträminorOthersWood/construction material supplier from Nordström's facilities in Södertälje.
• RehnsminorOthersBuilding materials supplier from Nordström's facilities in Nyköping.
• NA SvenssonminorOthersBuilding materials and hardware supplier in Trosa/Vagnhärad area via Woody chain.
• Norfloor KakelminorOthersTile and ceramic materials supplier.
• Jimmy Nilsson Snickeri ABminorOthersCustom carpentry/joinery supplier.
• LGB TimmerhusminorOthersTimber frame house supplier.

Scale indicators3 records

Recent moves5 records

Expansion highlights4 records

Broad incumbents

• Skanska: Sweden's largest construction group, active across building construction, residential, and infrastructure. Competes for the same municipal contracts Kjellbergs targets (and is simultaneously a customer, sourcing attic-conversion work to Kjellbergs).
• NCC: One of Sweden's largest general contractors and property developers, with broad residential, commercial, and civil operations. Directly competes with Kjellbergs on public-sector tenders in the Stockholm/Södermanland region, though at vastly greater scale.
• Peab: Major Nordic contractor and developer with broad capabilities across residential, commercial, and civil projects. Competes for public and private tenders across Sweden, including in the Södermanland region.

Direct peers

• HMB Construction: Regional Swedish construction firm with general contracting, new-build, and renovation offerings across public and private clients. Closely matches Kjellbergs' mid-sized, multi-discipline general contractor profile.
• ByggPartner: Mid-sized Swedish general contractor headquartered in Dalarna with regional offices. Closely comparable business model — turnkey general contracting for public, commercial, and residential clients — making it a strong regional peer analogue.
• Wästbygg: Swedish general contractor focused on commercial, residential, and public-sector buildings using a turnkey delivery model. Similar mid-market positioning to Kjellbergs and overlapping client segments.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

• Facebookfacebook.com/kjellbergsbygg
• LinkedInlinkedin.com/company/kjellbergs-bygg-i-trosa-ab
• Instagraminstagram.com/kjellbergs_bygg_i_trosa_ab

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

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 KJELLBERGS BYGG I TROSA AB