Byggmastargruppen
Byggmästargruppen is a Stockholm-based Swedish construction firm specializing in residential pipe replacement (stambyte) and commercial renovation, serving public housing companies, housing cooperatives, and private real estate clients across the Stockholm and Uppsala regions, with claimed market leadership in stay-in-place renovation methodology.
- Company typePrivate
- Founded-
- HeadquartersJohanneshov, Sweden
- Headcount51–100
- GTM typeB2B
- OfferingServices
What Byggmastargruppen does
Byggmästargruppen Stockholm BMG AB is a Stockholm-based Swedish construction company specializing in ROT (renovation, conversion, extension) services, operating through two business areas: ROT Bostad and ROT Kommersiellt. ROT Bostad focuses on stambyte (pipe replacement) and comprehensive renovation of multi-family residential buildings, with a differentiated kvarboende methodology enabling renovation while residents remain in their apartments; the company claims market leadership in Swedish stambyte with a production capacity of approximately 2,000 apartments per year and 10,000+ apartments renovated in the Stockholm region over the past five years. ROT Kommersiellt handles commercial renovation including office adaptations, retail, healthcare facilities, schools, and industrial buildings. The company's technical stack includes a proprietary luftad konstruktion (room-in-room ventilated construction) technique that reduces bathroom renovation time to approximately 3 weeks, alongside a customer-facing digital service portal called Byggmästarportalen.
The company's revenue model is project-based professional services, with work secured through competitive tenders, framework agreements (ramavtal) typically valued at SEK 40-200M per project, and multi-year strategic partnering arrangements (samverkan) with durations of 6-10 years. Pricing is custom-quoted per project scope. Customer segments include Swedish public housing companies (Stockholmshem, Botkyrkabyggen, Uppsalahem, Huge Bostäder, Väsbyhem), housing cooperatives (HSB-affiliated BRFs), and private real estate companies (Rikshem, Riksbyggen, Savills, Vasakronan, Vectura Fastigheter), with revenue geographically concentrated in Stockholm County and Uppsala County. The company is a wholly owned subsidiary of SEHED Byggmästargruppen AB (a conglomerate headquartered in Tyresö) and operates within the broader SEHED-koncernen that includes sister specialist firms covering roofing, facades, sheet metal, and general building services. Revenue is not publicly disclosed, and the company holds AAA credit rating, BKMA certification, Byggföretagen membership, and Miljöbyggnad Silver certification on select projects.
Byggmastargruppen firmographics
Firmographics- Name
- Byggmastargruppen
- Legal name
- Byggmästargruppen Stockholm BMG AB
- Website
- https://byggmastargruppen.se
- Company type
- Private
- Operating status
- Operating
- Headcount range
- 51–100 employees
- Short description
- Byggmästargruppen is a Stockholm-based Swedish construction firm specializing in residential pipe replacement (stambyte) and commercial renovation, serving public housing companies, housing cooperatives, and private real estate clients across the Stockholm and Uppsala regions, with claimed market leadership in stay-in-place renovation methodology.
- Ownership category
- akta.pro rank
Byggmastargruppen industry classification
Industry- Product category
- Building Renovation Services
- NAICS
- Residential Remodelers (236118)
- SIC
- General Bldg Contractors - Residential Bldgs (1520)
- akta.pro primary industry
- Renovation, Remodeling & Tenant Improvements (General Contracting) (IMAFAAAE)
- akta.pro secondary industries
- Full Gut Renovation (Studs-Out Remodel) (HSAPAEAA), Kitchen Permitting, Design & Project Management (HSAPAAAK)
Keywords
Where Byggmastargruppen is headquartered
LocationHeadquarters
- HQ city
- Johanneshov
- HQ country
- Sweden
- HQ region
- Europe
Offices3 records
Markets served
Byggmastargruppen business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Personnel, Operations, Supply Chain, Technology or R&D, Marketing or Sales
Revenue model
- ROT Bostad services: Pipe replacement (stambyte) and renovation of multi-family residential buildings. Includes total renovation of apartments with bathroom and kitchen renovation, electrical updates, and energy efficiency improvements. Revenue generated through project-based contracts with housing companies and cooperatives.
- ROT Kommersiellt services: Commercial renovation including tenant adaptations, office conversions, healthcare facilities, schools, and industrial buildings. Includes total renovation projects like Stadshagsskolan and new construction projects.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Other | Multi-year contract | Framework agreement projects with public housing companies |
Go-to-market motion2 records
Distribution channels3 records
Marketing channels4 records
Byggmastargruppen product offering
Product offeringCore offering
Byggmästargruppen provides specialized ROT (Renovation, Conversion, Extension) construction services through two business areas: ROT Bostad (residential renovation specializing in stambyte/pipe replacement with expertise in keeping residents in their homes during renovation) and ROT Kommersiellt (commercial renovation including tenant adaptations, office conversions, healthcare facilities, schools, and industrial buildings). The company secures projects through competitive tenders, framework agreements, and strategic partnering with major clients in the Stockholm region and eastern Sweden.
Product overview
Byggmästargruppen Stockholm BMG AB is a Stockholm-based construction company offering specialized ROT (renovation, conversion, extension) services through two distinct business areas: ROT Bostad and ROT Kommersiellt. ROT Bostad specializes in stambyte (stack replacement) and renovation of multi-family residential buildings, with the company claiming market leadership in stambyte with approximately 2,000 apartments renovated annually, predominantly with residents remaining in their homes. ROT Kommersiellt handles commercial property renovations including office adaptations, retail spaces, healthcare facilities, schools, and industrial buildings. The company also offers a digital service platform called Byggmästarportalen for customer interaction and a sustainability initiative called Byggomloppet focused on circular economy practices.
Differentiator
Problem solved
Functional benefit
Brands
- Byggomloppet: A sustainability initiative launched by Byggmästargruppen that defines and formalizes their circular economy work in construction, including material reuse, waste reduction, and sustainable building practices.
Quantifiable outcome
- ~2,000 apartments renovated per year
- +5 more outcomes
Companies that use Byggmastargruppen
Customer profileNamed customers15 records
Segments4 records
Ideal customer profiles4 records
Byggmastargruppen technology and API
TechnologyAPI detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature3 records
Byggmastargruppen partnerships and signals
Strategic signalPartnerships
16 partnerships are on record, tiered core and minor.
- BotkyrkabyggencoreStrategic partnering agreement spanning 6-10 years. Initial assignment includes pipe replacement in 5 buildings with 162 apartments, with potential for additional ~1,300 apartments. Continuation of successful previous collaboration including Kv Byatomten (235 apartments) and Kv Lagmannen (178 apartments). Focus on sustainable renovation with residents staying in place.
- UppsalahemcoreFramework agreement for major maintenance and renovation work valued at up to 200 Mkr per project with total framework capacity up to 250 Mkr per year. Covers Uppsala urban area and surrounding areas. Agreement period of 2 years with possibility to extend for additional 2 years.
- Huge Bostäder ABcoreFramework agreement for ROT projects in Huddinge municipality. Manages approximately 8,000 homes plus commercial spaces and district centers. Initial 2-year agreement with potential to extend for another 2 years.
- RikshemcoreFramework agreement for ROT work. Rikshem is one of Sweden's largest private real estate companies with approximately 29,000 apartments and numerous public properties. Owned by Fjärde AP-fonden and AMF Pensionsförsäkring AB.
- VäsbyhemcoreLong-term collaboration on renovation projects including Hasselgatan project (121 apartments), Hagängsvägen (first completed area), and ongoing projects. Worked with AFRY as consultant partner. Large-scale project covering 650 apartments over 5 years.
- SEHED Tresson ABcoreSister company within SEHED-koncernen providing specialist services in roofing, facades, balconies, and windows. Supports Byggmästargruppen's operations with specialized trade expertise. CEO Magnus Zetterlund serves as acting VD for both companies.
- Bång & Lewerth ABcoreSpecialist company within SEHED-koncernen network. Part of the group of specialist contractors supporting Byggmästargruppen's comprehensive building services.
- Erikssons Plåt ABcoreSpecialist sheet metal company within SEHED-koncernen. Provides specialized roofing and metalwork services for renovation projects.
- SEHED Bygg ABcorePart of SEHED Byggmästargruppen AB holding company. Main operating company within the construction group's network.
- SePu ABcoreSpecialist company within SEHED-koncernen network. Part of the group of specialist contractors supporting Byggmästargruppen's operations.
- AFRYminorConsulting engineering firm involved as partner in Väsbyhem projects. Contributed to Hagängsvägen project as part of the collaboration team.
- HSB Strategisk FörvaltningcoreHSB's strategic management division providing advisory services to housing cooperatives. Advised Brf Lofoten on renovation methodology choice. Multiple ongoing collaborations including Brf Granen (433 apartments) and BRF Tellus (590 apartments).
- ByggföretagenminorSwedish Construction Federation providing industry training and initiatives including the Inkluderande arbetsliv (Inclusive Workplace) program. Byggmästargruppen was first member company to complete the organization's training for inclusive workplace practices.
- Behaviour Design GroupminorConsulting firm engaged by Byggföretagen to conduct workshops on inclusive workplace practices. Delivered training to Byggmästargruppen's entire staff during autumn 2021.
- Stockholms ByggmästareföreningminorLocal trade association for building contractors in Stockholm. Co-initiator of Fair Play Bygg initiative against crime and unfair competition in the construction industry.
- Byggnads Stockholm-GotlandminorLabor union co-initiating Fair Play Bygg initiative. Takes received tips and gathers information about crime, irregularities, and unfair competition in construction.
Scale indicators7 records
Recent moves6 records
Expansion highlights6 records
Byggmastargruppen competitors and assessment
Company assessmentMarket position
Competitive moat5 records
Key highlights6 records
Customer concentration
Byggmastargruppen social profiles
Digital presenceByggmastargruppen financial estimates
Financial estimateRevenue estimate
Valuation estimate
Byggmastargruppen leadership team
Management profileNumber of profiles
Profiles7 records
Byggmastargruppen funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Byggmastargruppen 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 Byggmastargruppen
What does Byggmastargruppen do?
Byggmästargruppen provides specialized ROT (Renovation, Conversion, Extension) construction services through two business areas: ROT Bostad (residential renovation specializing in stambyte/pipe replacement with expertise in keeping residents in their homes during renovation) and ROT Kommersiellt (commercial renovation including tenant adaptations, office conversions, healthcare facilities, schools, and industrial buildings). The company secures projects through competitive tenders, framework agreements, and strategic partnering with major clients in the Stockholm region and eastern Sweden.
Is Byggmastargruppen a public or private company?
Byggmastargruppen is a private company. It is classified as corporate owned and is currently operating.
When was Byggmastargruppen founded?
Byggmastargruppen was founded in -1. It employs 51 to 100 people.
Where is Byggmastargruppen based?
Byggmastargruppen is headquartered in Johanneshov, Sweden, in the Europe region.
How does Byggmastargruppen make money?
Two revenue lines are on record. ROT Bostad services are the primary driver. The others are ROT Kommersiellt services.
Does Byggmastargruppen have an API?
No public API is recorded for Byggmastargruppen.
What industry is Byggmastargruppen in?
Byggmastargruppen's product category is Building Renovation Services. Its primary akta.pro industry code is IMAFAAAE, Renovation, Remodeling & Tenant Improvements (General Contracting), with a secondary code of HSAPAEAA, Full Gut Renovation (Studs-Out Remodel). Its NAICS code is 236118 and its SIC code is 1520.