What Genbyg does

Genbyg (legal entity GENBYG.DK A/S) is a privately held Danish company founded in 1998 and headquartered in Kastrup, with an additional warehouse in Sorø. The company operates what it self-describes as Denmark's largest webshop for used and surplus building materials, listing more than 93,459 SKUs across categories including doors and windows, lamps and electrical items, timber and flooring, door handles and knobs, masonry, plumbing, and kitchens. The catalogue mixes reused materials salvaged from demolition and renovation projects with new surplus items, and the company also manufactures its own line of Klassiske Danske Dørgreb (Classic Danish Door Handles) reproducing Danish designs from 1860-1950.

The business model is a self-serve e-commerce marketplace supplemented by physical showroom/warehouse pickup. Revenue is generated through one-time transactional sales of individual items at unit prices ranging from a few DKK to several thousand DKK, with no proprietary technology platform beyond standard webshop functionality (search, reservation, stock-alert "Varedetektiv", and auction "Bud varer" features). Go-to-market is primarily bottom-up through the website, supported by content marketing (blog at blog.genbyg.dk) and organic social (Facebook, Instagram). Two customer segments are served in parallel: private consumers undertaking DIY and restoration projects, and B2B customers (construction firms, contractors, property developers) with bulk and project-specific material needs.

A strategic inflection point occurred in November 2022 when construction company Enemærke & Petersen acquired a stake in Genbyg, formalising a partnership in which Genbyg acquires reusable and surplus materials from E&P construction sites for resale, creating a closed-loop supply chain tied to the green transition in Danish building. The company is a Danish A/S (public limited company) with 11-50 employees and operates exclusively within Denmark.

Name

Genbyg

Legal name

GENBYG.DK A/S

Website

https://genbyg.dk

Company type

Private

Founded year

1998

Operating status

Operating

Headcount range

11–50 employees

Ownership category

akta.pro rank

Product category

Reclaimed Building Materials

NAICS

Building Material and Garden Equipment and Supplies Dealers (444), Lumber, Plywood, Millwork, and Wood Panel Merchant Wholesalers (42331)

SIC

Wholesale-Lumber, Plywood, Millwork & Wood Panels (5031), Retail-Building Materials, Hardware, Garden Supply (5200)

akta.pro primary industry

Building Materials & Lumber Distribution (CRAOAFAD)

akta.pro secondary industries

Home Improvement & DIY (Tools, Hardware, Paint) Distribution (CRAOAFAC), Engineered Wood Products Distribution (LVL, I-joists, Glulam, CLT) (IMAMAIAD)

Keywords

• Reclaimed building materials
• Used construction supplies
• Salvaged architectural materials
• Building material reuse
• Sustainable construction materials

Headquarters

HQ city

Kastrup

HQ country

Denmark

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Product Sales - Used Building Materials: One-time transaction sales of used and surplus building materials through e-commerce platform. Products include doors, windows, lighting, electrical items, wood, flooring, door handles, masonry, plumbing, kitchen equipment, and miscellaneous construction materials.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels4 records

Core offering

Genbyg operates Denmark's largest e-commerce webshop for used and surplus building materials, offering over 93,000 items across categories including doors, windows, lighting, electrical items, wood, flooring, door handles, masonry, plumbing, and kitchen materials. The company acquires used and surplus building materials from construction sites and resells them to both private consumers and professional contractors, with pickup at physical locations in Kastrup and Sorø or arranged delivery.

Product overview

Genbyg operates Denmark's largest used building materials webshop — a single unified e-commerce platform offering over 93,000 items across multiple product categories. The core offering consists of used building materials organized into categories including Doors & Windows (Døre & Vinduer), Lamps & Electrical (Lamper & EL), Wood & Floors (Træ & Gulve), Door Handles & Knobs (Dørgreb & Knopper), Masonry (Murervarer), Plumbing & Kitchen (VVS & Køkken), Miscellaneous (Diverse), and Restpartier (surplus/leftover materials). The platform also features a B2B service for larger construction projects and an OUTLET section for discounted items. Genbyg produces its own line of Classic Danish Door Handles as an own-brand product, and operates complementary services like Bid on Items (Bud varer), Product Detective alerts (Varedetektiv), and Varehistorier (Product Stories) documenting the origins of sourced materials.

Differentiator

Problem solved

Functional benefit

Products and services

• Genbyg.dk Webshop (Used Building Materials) Denmark's largest e-commerce webshop for used and surplus building materials, offering over 93,000 items across categories including doors, windows, lamps, electrical items, wood, floors, door handles, plumbing, kitchen materials, masonry, and miscellaneous construction supplies. Serves both private consumers and professional contractors.
• B2B Services
• Klassiske Danske Dørgreb (Classic Danish Door Handles) Genbyg's own brand of classic Danish door handles, produced as exact replicas of original Danish handles from 1860-1950, manufactured locally in Denmark. Available in wood, brass, steel, and bakelite variants.

Named customers1 record

Segments3 records

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Partnerships

One partnership is on record.

• Enemærke & PetersencoreStrategic or Co-development Partner · 1 November 2022In November 2022, construction company Enemærke & Petersen invested in Genbyg with ambition to promote reuse in construction and accelerate green transition in the building industry. The partnership creates an ecosystem ensuring both demolished materials and unused surplus from construction sites are reused at scale. Materials are acquired by Genbyg and sold at advantageous prices to both private and business customers for renovation projects and new construction.

Scale indicators3 records

Recent moves5 records

Expansion highlights5 records

Direct peers

• Salvo Fair Trade: UK-based marketplace specializing in reclaimed and antique architectural salvage, including doors, windows, fixtures, and fittings. Closely comparable business model and product mix as a specialist reuse retailer, though operating in a different geography.
• Habitat for Humanity ReStore: Non-profit network of stores in the US (and select EU markets) reselling donated, surplus, and reclaimed building materials and home goods. Directly comparable reuse-retail model with similar product categories (doors, windows, fixtures, furnishings).
• Second Use (Seattle): Seattle-based salvage and resale retailer of reclaimed building materials including doors, windows, plumbing fixtures, and architectural elements. Closely aligned business model in a separate geography.

Broad incumbents

• XL-Byg: Danish building materials merchant and pro-oriented dealer network. Comparable customer overlap with Genbyg's contractor/builder segment but supplies new materials only, not reclaimed/surplus.
• Bauhaus Danmark: Major DIY/home improvement retailer in Denmark selling tools, building materials, and home goods. Comparable end customer (DIY consumers and small contractors) but focused on new-product mass retail rather than reuse.
• Jem & Fix: Danish low-price DIY/hardware chain. Comparable DIY customer segment and broad home improvement assortment, though not in reclaimed/surplus materials.
• Davidsen Byggemarked: Danish building materials retailer serving both consumers and contractors across multiple locations. Represents competition for retail/pro DIY demand and outlet-format shopping behavior.

Regional players

• Byggnadsvård (Gysinge / Byggnadsvård.se): Swedish specialist in traditional building materials, restoration supplies, and reclaimed/salvaged items. Comparable niche positioning in heritage and restoration materials but operates primarily in Sweden rather than Denmark.

Others

• Ramboll (Circular Buildings): Engineering consultancy active in circular construction and reuse advisory across the Nordics. Comparable driver of the same sustainability tailwind Genbyg is riding—supporting demand for reused building materials—rather than a direct competitor.

Emerging players

• Retrouv.dk / Re-build.dk (Danish reclamation): Danish platforms focused on resale and reuse of building components, overlapping with Genbyg's sustainability narrative and audience. Early-stage scaling relative to Genbyg's 25+ year track record.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks5 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/genbyg

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 Genbyg