Open House Greece

What Open House Greece does

Open House Greece is a non-profit cultural organization that operates the annual Open House architectural tour festivals in Athens (since 2014) and Thessaloniki (since 2012), under the umbrella of the international Open House Worldwide network founded in London in 1992. The organization runs a weekend event each spring that opens 100+ public and private buildings for free public tours across Athens, complemented by parallel programs including Open Office (visits to architectural firms, running since 2021), Made in Athens (creative studio tours sponsored by attica), Open Walks (guided neighborhood walks), and Night Walks by IFI Lighting. The 2025 edition featured 101 building sites, 460 volunteers, and approximately 35,000 visits.

The organization operates with a small paid staff of 9 employees supplemented by a large annual volunteer corps (400-540 selected in recent years), and delivers programming on standard web infrastructure (WordPress), QR-code-based visitor tracking, and digital mapping. Funding is sourced from corporate sponsorships (PRODEA, attica department stores, ANAKEM, National Bank of Greece, Dimand, Kleemann Lifts, Lamda Development, Noval Property, Hellenic Properties, Campeon Gaming, The Source, IFI Lighting), government and institutional support (Greek Ministry of Culture, City of Athens, Greek National Tourism Organisation/EOT, EU Creative Europe co-funding), and ecosystem partners (Vakalo Art & Design College in a 12-year continuous partnership, Endeavor Greece). Secondary revenue streams include printed event programs, tote bags, keychains, and hanging items sold during the festival, plus donations that support an otherwise free-to-attend public offering.

Name

Open House Greece

Legal name

Open House Athens

Website

https://openhouseathens.gr

Company type

Private

Founded year

2014

Operating status

Operating

Headcount range

1–10 employees

Short description

Open House Greece is a non-profit cultural organization operating the annual Open House Athens and Thessaloniki architectural tour festivals, opening 100+ buildings free each spring to the public, supported by corporate sponsors, government partners, and a 400+ volunteer corps.

Ownership category

akta.pro rank

Product category

Cultural Events

NAICS

Museums (712110)

SIC

Services-Amusement & Recreation Services (7900)

akta.pro primary industry

Faculty-Led Study Tours & Embedded Short Programs (Home Institution-Led) (EDAIAIAJ)

Keywords

• Architectural tours
• Architecture festival
• Cultural heritage events
• City walking tours
• Building open days

Headquarters

HQ city

Athens

HQ country

Greece

HQ region

Europe

Offices1 record

Markets served

GTM type

B2C

Offering type

Services

Cost components

Operations, Personnel, Marketing or Sales, Others, Technology or R&D

Revenue model

1. Sponsorship and Financial Support: Open House Athens operates primarily through financial sponsorships and support from corporate sponsors (PRODEA, attica department stores, ANAKEM), government bodies (Ministry of Culture, City of Athens, Greek National Tourism Organisation), and institutional partners (Endeavor Greece). The event is free to the public, with revenue generated through sponsor partnerships rather than ticket sales.
2. Merchandise and Printed Programs: The organization sells printed programs, tote bags, plexiglass hanging items, and keychains during the event. Proceeds help support the event and keep activities free.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels5 records

Core offering

Open House Greece is a non-profit cultural organization that organizes free annual architectural tours and events in Athens every spring, opening both public and private buildings to the general public over a single weekend. Its core offerings are the thematic tour programs — Open Tours, Open Office, Made in Athens, Open Walks, and Night Walks — supported by educational competitions, a digital archive, and printed programs/merchandise.

Product overview

Open House Greece operates as a non-profit cultural organization that organizes free architectural tours and related programs in Athens. The core offerings include Open Tours (main building tours), Open Office (architectural office tours), Made in Athens (creative space tours), Open Walks (guided neighborhood walks), and Night Walks (lighting-focused tours). Supporting programs include competitions (Design the Poster, Open Your Portfolio, photography contests), a digital archive of past events, and printed merchandise. All tours are free, held annually in spring, with parallel events starting earlier in March. The organization is part of the Open House Worldwide network and has been operating since 2014.

Differentiator

Problem solved

Functional benefit

Products and services

• Open Tours Free architectural tours of public and private buildings across Athens held annually over one weekend each spring. The main event opens dozens of buildings to visitors at no charge, including residences, offices, cultural spaces, and landmarks.
• Open Office Tours of architectural offices in Athens allowing the public to meet architects and learn about their working methods and practices, targeted at architecture and design enthusiasts as well as students.
• Made in Athens Tours of creative and production spaces in Athens showcasing established and emerging creators. The program features workshops, studios, and manufacturing spaces including ceramics, jewelry, textile, and design studios.
• Open Walks Guided walking tours through specific urban areas and neighborhoods, combining architecture, history, and contemporary urban development, presented as part of the main Open Tours program.
• Night Walks by IFI Lighting Evening walking tours exploring Athens through lighting design, visiting landmark buildings illuminated as part of the event, in collaboration with lighting design companies such as IFI Lighting.
• Design the Poster Competition Annual graphic design competition co-organized with Vakalo Art & Design College to design the visual identity of Open House Athens and Thessaloniki events. The winner receives a scholarship.
• Open Your Portfolio Competition Annual portfolio competition organized with Vakalo Art & Design College awarding scholarships for an MA Architectural Design programme, open to students and professionals in architecture and design fields.
• Photography Competitions Annual photography competitions with themes related to architecture and Open House events, often sponsored by corporate partners.
• Open House Memories Digital archive of past Open House Athens events since 2014, including photographs and media coverage.
• Printed Program & Event Merchandise Printed event programs and commemorative merchandise including tote bags, keychains, and hanging items available at participating buildings during events, with proceeds supporting the free festival.

Quantifiable outcome

• 35,000 visits during the 2025 event
• +2 more outcomes

Named customers3 records

Segments4 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Partnerships

Eleven partnerships are on record, tiered major, core and minor.

• Greek National Tourism Organisation (EOT)majorGTM or Marketing PartnerThe Greek National Tourism Organisation provides support for the Open House Athens event, helping promote Greek cultural heritage and architecture to visitors and tourists. The organization was mentioned as kindly supporting the 2026 event.
• City of AthensmajorStrategic or Co-development PartnerThe City of Athens is a key institutional partner providing support for the annual Open House Athens event. The municipality supports the organization of events and provides access to public spaces.
• Ministry of CulturemajorStrategic or Co-development PartnerThe Greek Ministry of Culture provides financial and institutional support for the event, helping promote architectural heritage preservation.
• Vakalo Art & Design CollegecoreStrategic or Co-development PartnerVakalo Art & Design College has been a proud supporter for 12 consecutive years, organizing the 'Open Your Portfolio' competition and awarding scholarships for architecture and design students. They also co-organize the 'Design the Poster' competition.
• Endeavor GreececoreStrategic or Co-development PartnerEndeavor Greece provides support through its 'Innovation Cluster' initiative, with some events hosted at their facilities. The organization helps connect entrepreneurs and innovators with the Open House event.
• ANAKEMmajorStrategic or Co-development PartnerANAKEM is the event sponsor for the 'Open Office' category. They are the largest Collective System for Alternative Management of Construction and Demolition Waste in Greece, operating across 13 regions and 69 regional units.
• attica department storescoreStrategic or Co-development Partnerattica department stores sponsor the 'MADE in Athens' parallel event, which showcases creative workspaces and studios of Athenian creators. They also host some events at their flagship City Link location.
• IFI LightingminorStrategic or Co-development PartnerIFI Lighting collaborates with Open House Athens for the 'Night Walk' event, highlighting Athens' architectural heritage through lighting design. The partnership explores how light reveals different scales of the urban environment.
• Open House WorldwidecoreStrategic or Co-development PartnerOpen House Worldwide is the global body responsible for communication and promotion of Open House events worldwide. Open House Athens is part of this international network that began in London in 1992.
• Open House Europe / European Union (Creative Europe)majorStrategic or Co-development PartnerOpen House Athens participates in the Open House Europe project, co-funded by the European Union (Creative Europe). This includes volunteer exchange programs with other Open House festivals across Europe.
• Open House ThessalonikicoreStrategic or Co-development PartnerOpen House Thessaloniki was the first Greek city to host the Open House event (since 2012), before Athens joined in 2014. They co-organize events like the 'Design the Poster' competition with shared visual identity.

Scale indicators5 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Heritage Open Days: England's largest heritage event organized by the National Trust, opening thousands of historic properties to the public free of charge each year. Operates a near-identical model of free public access to significant buildings during a designated event period.
• Open House Worldwide: The global umbrella organization for all Open House events, founded in London in 1992. Open House Athens operates under its licensing and coordination; the body also facilitates cross-promotion, volunteer exchanges, and shared international infrastructure.
• Open House New York: New York's sister Open House weekend offering free access to architecturally significant sites across the city. Operates under the same global network with an analogous program structure, volunteer base, and sponsorship model.
• Doors Open Toronto: Toronto's annual architecture and design event offering free public access to significant buildings. Mirrors the Open House Athens weekend format with volunteer-driven operations and sponsor-supported funding.
• Open House Thessaloniki: The first Greek Open House city, established in 2012, and direct sister organization to Open House Athens. They co-organize competitions like 'Design the Poster,' share visual identity, and operate the same free architectural tour model in a different Greek city.
• Open House London: The original Open House event founded in London in 1992 and the model on which Open House Athens is directly based. Operates under the same Open House Worldwide umbrella with the same brand, mission, and free public-access-to-buildings format, making it the closest comparable.

Broad incumbents

• Architecture Foundation: A London-based non-profit advancing public understanding of architecture through year-round programming, talks, and exhibitions. Shares Open House Athens's educational mission around architectural appreciation but operates a permanent venue rather than an annual event format.
• European Heritage Days: A Council of Europe initiative running annual heritage events in 50+ countries focused on opening cultural sites to the public. Open House Athens participates in adjacent networks (Open House Europe) but European Heritage Days operates as a much larger, pan-European program with national coordination bodies.
• The Center for Architecture: The New York-based foundation of the AIA providing exhibitions, talks, and tours promoting public understanding of architecture. Comparable in mission to Open House Athens but operates a permanent gallery space and year-round educational programming.

Emerging players

• Docomomo: An international organization dedicated to documentation and conservation of modernist architecture. Shares Open House Athens's focus on architectural heritage and public engagement but emphasizes preservation advocacy and academic research over event production and city-wide programming.

Market position

Strengths5 records

Weaknesses4 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• YouTubeyoutube.com/openhouseathens-2014
• Facebookfacebook.com/OpenHouseAthens
• Instagraminstagram.com/openhouseathens
• LinkedInlinkedin.com/company/open-house-greece

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

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M&A

Investments

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Frequently asked questions about Open House Greece