1,386
Active legal entities
The starting population matching current main industry and active register status.
Largest Finnish architecture firms 2026
We ranked active legal entities classified in architectural services by their latest revenue observation.
DM Faster market map
1,386
Active legal entities
- 543
- 30
Company, classification, and financial observations from DM Faster company data. Official identities and active register status are based on PRH Open Data.
Short answer
The largest architecture firm in Finland is Arco Architecture Company Oy (€16.5M).
Questions about the ranking
- What is the largest architecture firm in Finland?
- The largest architecture firm in this comparison is Arco Architecture Company Oy. The rank uses the latest public revenue figure and covers the whole legal entity.
- How many companies were compared?
- DM Faster ordered 543 legal entities with a comparable revenue observation. This page publishes the largest 30.
- What does the ranking leave out?
- Technical design and engineering firms have their own list. This page contains architectural services only.
Legal-entity comparison
Largest Finnish architecture firms 2026
Every row shows rank, official legal entity, Finnish Business ID, current PRH main industry, fiscal year, personnel, and the DM Faster revenue observation.
Arco Architecture Company Oy
€16.5MHelsinki
Rejlers Rakentaminen Oy
€15.2MVantaa
Sarc + Sigge Arkkitehdit Oy
€14.3MHelsinki
Lukkaroinen Arkkitehdit Oy
€10.8MOulu
One Architects Oy
€9.6MHelsinki
Lundén Architecture Oy
€6.8MHelsinki
Arkkitehtipalvelu Oy
€6.6MJyväskylä
Arkkitehtitoimisto Tähti-Set Oy
€5.8MTampere
L Arkkitehdit Oy
€4.9MHelsinki
Tietoa Finland Oy
€4MHelsinki
- 1
Arco Architecture Company Oy
Arkkitehtipalvelut
€16,526,000
- Business ID
- 2240452-4
- City
- Helsinki
- Fiscal year
- 2025
- Personnel
- 133
- 2
Rejlers Rakentaminen Oy
Arkkitehtipalvelut
€15,245,000
- Business ID
- 3275852-9
- City
- Vantaa
- Fiscal year
- 2025
- Personnel
- 171
- 3
Sarc + Sigge Arkkitehdit Oy
Arkkitehtipalvelut
€14,262,000
- Business ID
- 0799078-0
- City
- Helsinki
- Fiscal year
- 2025
- Personnel
- 87
- 4
Lukkaroinen Arkkitehdit Oy
Arkkitehtipalvelut
€10,840,000
- Business ID
- 2557243-5
- City
- Oulu
- Fiscal year
- 2024
- Personnel
- 90
- 5
One Architects Oy
Arkkitehtipalvelut
€9,551,000
- Business ID
- 0979166-2
- City
- Helsinki
- Fiscal year
- 2025
- Personnel
- 86
- 6
Lundén Architecture Oy
Arkkitehtipalvelut
€6,825,000
- Business ID
- 2229148-6
- City
- Helsinki
- Fiscal year
- 2024
- Personnel
- 51
- 7
Arkkitehtipalvelu Oy
Arkkitehtipalvelut
€6,562,000
- Business ID
- 2254286-3
- City
- Jyväskylä
- Fiscal year
- 2025
- Personnel
- 58
- 8
Arkkitehtitoimisto Tähti-Set Oy
Arkkitehtipalvelut
€5,818,000
- Business ID
- 3328295-6
- City
- Tampere
- Fiscal year
- 2025
- Personnel
- 55
- 9
L Arkkitehdit Oy
Arkkitehtipalvelut
€4,949,000
- Business ID
- 0945582-9
- City
- Helsinki
- Fiscal year
- 2025
- Personnel
- 37
- 10
Tietoa Finland Oy
Arkkitehtipalvelut
€3,961,000
- Business ID
- 1622220-6
- City
- Helsinki
- Fiscal year
- 2024
- Personnel
- 39
- 11
Verstas Arkkitehdit Oy
Arkkitehtipalvelut
€3,806,000
- Business ID
- 2027429-5
- City
- Helsinki
- Fiscal year
- 2025
- Personnel
- 32
- 12
RE-Suunnittelu Oy - RE-Engineering LTD
Arkkitehtipalvelut
€3,801,000
- Business ID
- 2374453-9
- City
- Helsinki
- Fiscal year
- 2025
- Personnel
- 34
- 13
Arkkitehtitoimisto Helamaa & Heiskanen Oy
Arkkitehtipalvelut
€3,055,000
- Business ID
- 3195457-9
- City
- Tampere
- Fiscal year
- 2025
- Personnel
- 43
- 14
Komulainen Arkkitehdit Oy
Arkkitehtipalvelut
€2,694,000
- Business ID
- 1544643-5
- City
- Oulu
- Fiscal year
- 2025
- Personnel
- 9
- 15
Arkkitehtitoimisto A-Konsultit Oy
Arkkitehtipalvelut
€2,655,000
- Business ID
- 0103330-6
- City
- Helsinki
- Fiscal year
- 2025
- Personnel
- 16
- 16
Gravicon Oy
Arkkitehtipalvelut
€2,267,000
- Business ID
- 0807661-6
- City
- Helsinki
- Fiscal year
- 2024
- Personnel
- 16
- 17
Arkkitehtuuri- ja muotoilutoimisto Talli Oy
Arkkitehtipalvelut
€2,263,000
- Business ID
- 1010946-4
- City
- Helsinki
- Fiscal year
- 2025
- Personnel
- 20
- 18
Tengbom Oy
Arkkitehtipalvelut
€2,240,000
- Business ID
- 2046295-8
- City
- Helsinki
- Fiscal year
- 2025
- Personnel
- 20
- 19
Joarc Architects Oy
Arkkitehtipalvelut
€2,220,000
- Business ID
- 2037853-7
- City
- Helsinki
- Fiscal year
- 2024
- Personnel
- 10
- 20
Arkkitehdit Kontukoski Oy
Arkkitehtipalvelut
€2,209,000
- Business ID
- 2235782-8
- City
- Tampere
- Fiscal year
- 2025
- Personnel
- 22
- 21
Suunnittelutoimisto Amerikka Oy
Arkkitehtipalvelut
€2,177,000
- Business ID
- 1903946-6
- City
- Helsinki
- Fiscal year
- 2025
- Personnel
- 21
- 22
Muuan Oy
Arkkitehtipalvelut
€2,155,000
- Business ID
- 2649865-2
- City
- Helsinki
- Fiscal year
- 2024
- Personnel
- 22
- 23
Arkkitehtitoimisto Haroma & Partners Oy
Arkkitehtipalvelut
€2,142,000
- Business ID
- 1874971-4
- City
- Turku
- Fiscal year
- 2024
- Personnel
- 25
- 24
Bolder Development Oy
Arkkitehtipalvelut
€2,088,000
- Business ID
- 3099926-5
- City
- Helsinki
- Fiscal year
- 2024
- Personnel
- 13
- 25
ARKKITEHTITOIMISTO AJAK OY
Arkkitehtipalvelut
€2,011,000
- Business ID
- 2390014-0
- City
- Helsinki
- Fiscal year
- 2025
- Personnel
- 18
- 26
Renell Käppi Arkkitehdit Oy
Arkkitehtipalvelut
€1,964,000
- Business ID
- 0361542-2
- City
- Helsinki
- Fiscal year
- 2024
- Personnel
- 17
- 27
LPR-arkkitehdit Oy
Arkkitehtipalvelut
€1,944,000
- Business ID
- 9039555-1
- City
- Turku
- Fiscal year
- 2025
- Personnel
- 19
- 28
BST-Arkkitehdit Oy
Arkkitehtipalvelut
€1,885,000
- Business ID
- 1934227-0
- City
- Tampere
- Fiscal year
- 2024
- Personnel
- 21
- 29
Saatsi Arkkitehdit Oy
Arkkitehtipalvelut
€1,877,000
- Business ID
- 0653704-4
- City
- Helsinki
- Fiscal year
- 2025
- Personnel
- 14
- 30
Arkkitehtitoimisto Paloranta Oy
Arkkitehtipalvelut
€1,803,000
- Business ID
- 0981806-0
- City
- Ylivieska
- Fiscal year
- 2025
- Personnel
- 20
Revenue concentration
How much of the published sample belongs to the five largest entities?
The five largest entities account for 46.8 % of the published top-30 sample's combined revenue. Median revenue is €2.5M.
Ranks 1–5
46.8 %€66.4M
Ranks 6–10
19.8 %€28.1M
Ranks 11–30
33.3 %€47.3M
Shares describe the published top-30 sample, not official market shares for the entire market.
Market by city
Where are the industry's companies located?
Registered home cities of active legal entities in DM Faster's PRH-backed company data.
Helsinki
509
Espoo
98
Tampere
82
Oulu
61
Turku
51
Lahti
33
Vantaa
24
Kuopio
21
Jyväskylä
17
Porvoo
14
Registered home cities of active legal entities in DM Faster's PRH-backed company data.
Report scope
The list covers legal entities in architectural services.
The report covers active legal entities whose current main industry is architectural services, TOIMI4 71110. Engineering firms are outside this list.
PRH
Legal-entity view
Names, Business IDs, industry, and register status all refer to the same legal entity.
TOL
Versioned industry code
The classification version prevents identically numbered codes in old and new classifications from being mixed.
Methodology
How was this top 30 built?
The report is a reproducible snapshot of DM Faster's comprehensive PRH-backed Finland company data. The industry-code version is retained with each code so identically numbered categories in old and new TOL classifications cannot be mixed.
1. Market definition
2,332 industry matches were selected from DM Faster company data using the correct code and TOL-version combination.
2. Active legal-entity population
After active-register and legal-entity checks, 1,386 entities remained in the market map.
3. Financial-data matching
543 entities had a latest comparable DM Faster revenue observation.
4. Publication
Legal entities were sorted by revenue, and the largest 30 were published with Business IDs, industries, and fiscal years.
How to read the dataset
- The report covers legal entities. Separate Business IDs in the same group remain separate.
- The ranking uses the latest comparable DM Faster revenue observation, with fiscal year shown on every row.
- Industry version and code are checked together. The numeric code alone is not enough to identify the category.
- DM Faster updates the market map as PRH register and classification data and new financial observations change.
Cite this research
A clear source for the original data.
DM Faster Data (2026). Largest Finnish architecture firms 2026. https://dmfaster.com/research/largest-architecture-firms-finland
Cite the findings with attribution.
You may cite findings and reproduce short excerpts when DM Faster is visibly credited and this report is linked. Republishing the full table, bulk reuse, and commercial redistribution require written permission from DM Faster.
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