Realdania By & Byg

What Realdania By & Byg does

Realdania By & Byg is a Danish mission-driven real estate company (legal name Realdania By & Byg A/S, CVR nr. 1013 0751) operating as a wholly-owned subsidiary of the philanthropic association Realdania. With approximately 35 employees across offices in Copenhagen (Jarmers Plads 2) and Odense (Nørregade 29), the company acquires, restores, develops, and rents a portfolio of historically significant Danish properties whose architecture spans from the Middle Ages to the present. Its mandate is to execute Realdania's mission regarding quality of life in the built environment, specifically by undertaking projects that traditional private developers cannot justify — namely, the preservation of architectural heritage via long-hold ownership and sustainable restoration.

The operating model combines four interlocking activities. First, core rental activity consists of leasing heritage properties to private individuals and businesses under individually negotiated agreements, with the experience club (Realdania By & Byg Klubben) members receiving first notice of vacancies. Second, the company runs an experimental construction program through MiniCO2 Etagehusene, which has branched into DIGITAL and TRÆ/HYBRID variants to test scalable low-CO2 construction methods. Third, it co-develops arealudviklingsselskaber (area development companies) with Danish municipalities and other investors to realize visions for future urban life. Fourth, it disseminates knowledge through lifecycle assessments of historic properties, published books, newsletters, social media, and a calendar of on-site and online open-house events — converting preservation work into industry-shared methodology. Notable recent activity includes the acquisition and multi-year restoration of the 1739 baroque Tersløsegård manor (through autumn 2027) and active restorations of architect-signature houses including those of Arne Jacobsen, Mogens Lassen, Knud Friis, and J.F. Willumsen.

The revenue base is property rental, characterized by the company as recurring and matched to tenants rather than market-priced; no pricing or unit-level data is publicly disclosed, and the entity reports through the parent Realdania consolidated financial statements rather than standalone accounts. Strategic positioning is anchored in three differentiators: patient philanthropic capital from Realdania, EU Taxonomy-alignment targets for the property portfolio (with documented social minimum standards and risk analysis), and signatory status to the Charter for Social Responsibility in Construction. Distribution is exclusively domestic (Denmark), go-to-market is community-led through the experience club, and the company's posture is closer to a foundation-style operator and construction R&D lab than a commercial real estate developer.

Name

Realdania By & Byg

Legal name

Realdania By & Byg A/S

Website

https://realdaniabyogbyg.dk

Company type

Private

Operating status

Operating

Headcount range

11–50 employees

Short description

Realdania By & Byg is a Danish mission-driven real estate company and wholly-owned subsidiary of the Realdania philanthropic foundation that acquires, restores, and rents historic properties, runs experimental low-CO2 construction projects, and co-develops urban areas with municipalities.

Ownership category

akta.pro rank

Product category

Historic Property Management and Restoration

NAICS

Lessors of Real Estate (5311), Real Estate Property Managers (53131)

SIC

Real Estate Operators (No Developers) & Lessors (6510), Real Estate Dealers (For Their Own Account) (6532)

akta.pro primary industry

Historic Preservation & Conservation Planning (BPAHAKAH)

akta.pro secondary industry

Community Engagement & Participatory Planning (BPAHAKAO)

Keywords

• Historic property restoration
• Urban development services
• Heritage building management
• Sustainable construction
• Property rental services

Headquarters

HQ city

Copenhagen

HQ country

Denmark

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Infrastructure, Marketing or Sales

Revenue model

1. Property Rental: Realdania By & Byg rents out its properties to private individuals and businesses. The organization leases all properties to ensure their best possible future, seeking the right match between premises and tenant.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels5 records

Core offering

Realdania By & Byg owns and manages a collection of unique historic Danish properties spanning architecture from the medieval period to the present, leasing them to private individuals and businesses to ensure their preservation. The company also conducts urban development projects in partnership with Danish municipalities and runs experimental construction projects such as MiniCO2 Etagehusene to develop sustainable building practices.

Product overview

Realdania By & Byg is a wholly-owned subsidiary of Realdania that manages real estate ownership, urban development, and experimental building projects. The company operates through several integrated offerings: its core business encompasses the ownership and restoration of unique historical properties (ejendomme til leje), which are rented out for preservation; it runs an experience club (Realdania By & Byg Klubben) providing exclusive access to projects and events; it conducts experimental construction through MiniCO2 Etagehusene to develop low-carbon building methods; and it produces knowledge products including publications and lifecycle assessments to share learnings with the construction industry.

Differentiator

Problem solved

Functional benefit

Brands

• Realdania By & Byg Klubben: Experience club allowing members to visit Realdania By & Byg's projects and historical houses, including open house events and building site visits.

Products and services

• Ejendomme til leje (Properties for Rent) Rental of unique historic properties managed by Realdania By & Byg, leased to private individuals or businesses to ensure their preservation and sustainable operation. The organization seeks the optimal match between premises and tenant.
• MiniCO2 Etagehusene Experimental low-CO2 apartment building project exploring construction methods and digital tools to reduce carbon emissions in new construction. Developed with multiple variations (DIGITAL and TRÆ/HYBRID) to find scalable CO2-reducing solutions for the broader market.
• Realdania By & Byg Klubben (Experience Club) Experience club that allows members to visit Realdania By & Byg's construction projects, historical houses, and restoration sites, offering exclusive access to open houses and behind-the-scenes tours. Members receive first notice of available rentals.
• Livscyklusvurderinger for historiske ejendomme (Lifecycle Assessments for Historic Properties) Lifecycle assessments of historical properties examining CO2 emissions and climate impact of restoration projects, providing research and methodology for sustainable building conservation through the knowledge library.

Quantifiable outcome

• Life cycle assessments conducted on restoration projects to measure and reduce CO2 emissions from both restoration and operation of historic properties

Named customers2 records

Segments2 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature1 record

Partnerships

One partnership is on record.

• Danish MunicipalitiescoreStrategic or Co-development PartnerRealdania By & Byg partners with Danish municipalities and other investors in area development companies (arealudviklingsselskaber) to develop and realize visions for future urban life. These are long-term strategic partnerships focused on urban development projects.

Scale indicators2 records

Recent moves5 records

Expansion highlights4 records

Regional players

• Bygningsfredningsfonden: Danish foundation supporting preservation of listed historic buildings through grants and acquisition. Operates in the same Danish heritage preservation space as Realdania By & Byg but with a grant-funding model rather than direct ownership and rental.
• La Fondation du Patrimoine: France's heritage foundation supporting preservation of historic buildings and cultural sites. Comparable as a mission-driven organization focused on architectural heritage across a single national territory.
• Stiftung Denkmalschutz: Germany's largest private foundation for monument preservation, funding the conservation of historically significant buildings. Comparable mission focus on architectural heritage stewardship, though operating through grants rather than direct ownership and rental of properties.

Direct peers

• The Landmark Trust: UK charity that rescues and restores historic buildings of architectural significance, then lets them as holiday accommodation. Comparable operating model: specialist heritage property owner restoring architecturally unique buildings and generating revenue through curated stays and rentals.
• National Trust: UK charity that owns and preserves historic houses, gardens, and architectural heritage, opening them to the public through membership. Most structurally comparable to Realdania By & Byg: foundation-owned, mission-driven, operates unique historic properties with public engagement and rental components.
• Historic Royal Palaces: UK charity managing unoccupied royal palaces and operating them for public access. Comparable in combining heritage property stewardship, restoration, public engagement programming, and rental/operational revenue from unique historic assets.

Broad incumbents

• Realdania: Parent philanthropic association and Denmark's largest private foundation focused on the built environment. Directly comparable as the ultimate funder and strategic driver of Realdania By & Byg's mission, with broader grant-making, project funding, and policy influence across Danish real estate and quality-of-life initiatives.

Emerging players

• By & Havn: Copenhagen-area urban development company responsible for developing the city's harbor and urban areas, jointly owned by the City of Copenhagen and the Danish state. Comparable as a Danish urban development vehicle working on area-based, municipality-partnered real estate transformation projects.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks5 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/realdania-byg

Compliance2 records

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 Realdania By & Byg