Risk grade updatedRisk gradeEvidence verified
17 Oct 2026 · BUSINESS.fi / Opterom LuottoluokitusAutomatic grade A3.Business profile
Rakennustoimisto O.Hämäläinen Oy
Rakennustoimisto O.Hämäläinen Oy's registered office is Helsingfors. It is a limited company. The company was established on 2014-09-23. It operates in the industry of other engineering design and technical consultancy incidental to building construction. In its latest retained statement for 2025-08-31, revenue was €360,071 and operating profit was €672,410.
Business ID 2640459-9ValidUnclaimed company profile
Trusted core data
Public company details from the trade register.
- Business ID
- 2640459-9
- Sector
- Other engineering design and technical consultancy incidental to building construction
- Municipality
- Helsingfors
- Company form
- Limited company
- Registration date
- 2014-09-23
- Business ID registration date
- 2014-09-08
- Business status
- Valid
- Profile ownership
- Unclaimed company profile
Contact and location summary
Visiting address: Valimotie 17-19, 00380, Helsingfors
Phone: +358408421400Source observation
Email: [email protected]Source observation
Website: https://www.rtoh.fiSource observation
People and decision-makers
Hämäläinen Olli ValtteriToimitusjohtaja
About Rakennustoimisto O.Hämäläinen Oy
Financial position and key figures for the company.
Rakennustoimisto O.Hämäläinen Oy's location municipality is Helsingfors. It is a limited company. The company was established on 2014-09-23. It operates in the industry of other engineering design and technical consultancy incidental to building construction. In its latest retained statement for 2025-08-31, revenue was €360,071 and operating profit was €672,410. Based on the latest retained statement, revenue growth was -87.8%, operating margin was +186.7%, and equity ratio was not currently available.
Auxiliary business names
Public alternate names materialized from source observations.
Byggnadskontor O. Hämäläinen Ab
Extended business activity
A longer directory- or registry-backed activity description that complements the short registry industry label.
Yhtiön toimiala on rakentamispalvelut, konsultointi, urakointi sekä kaikki muu laillinen toiminta.
Financial highlights
Key figures from the latest financial period.
Latest financial period
2025-08-31
4
3
Combined source
Derived indicators
Revenue growth-87.8%
Operating margin186.7%
Revenue€360,071-€2,601,670 (-87.8%) vs previous periodPrevious: €2,961,741
Operating profit (loss)€672,410-€61,388 (-8.4%) vs previous periodPrevious: €733,798
Assets€941-€903,385 (-99.9%) vs previous periodPrevious: €904,326
Balance-sheet contextLatest financial period
Employees16Previous: 16
Revenue trend5 periods
€1,364,928
2021-08-31
€1,618,571
2022-08-31
€2,017,590
2023-08-31
€2,961,741
2024-08-31
€360,071
2025-08-31
Operating profit (loss) trend5 periods
€396,029
2021-08-31
€383,433
2022-08-31
€388,563
2023-08-31
€733,798
2024-08-31
€672,410
2025-08-31
Profit (loss) for the financial year trend4 periods
€311,565
2021-08-31
€281,800
2022-08-31
€295,030
2023-08-31
€615,115
2024-08-31
Assets trend5 periods
€918,613
2021-08-31
€1,100,787
2022-08-31
€1,072,855
2023-08-31
€904,326
2024-08-31
€941
2025-08-31
Financial ratios
Financial ratios based on financial statement data. Source: Yhdistetty lähde.
Equity ratioNot assessable
0/100 · Trend unavailable
Current ratioNot assessable
0/100 · Trend unavailable
Operating profit marginGood
100/100 · Improving
Ratio history
| Ratio | 2021-08-31 | 2022-08-31 | 2023-08-31 | 2024-08-31 | 2025-08-31 |
|---|---|---|---|---|---|
| Equity ratio | 66.2 % | 72.1 % | 66.2 % | 38.7 % | - |
| Current ratio | 0.79x | - | 0.38x | 0.56x | - |
| Operating profit margin | 29.0 % | 23.5 % | 19.2 % | 24.7 % | 186.7 % |
Registry status and identifiers
Current registry information and identifiers based on YTJ data.
YTJ statusValid
Trade RegisterRegistered
Business ID2640459-9
VAT IDFI26404599
EU IDFIFPRO.2640459-9
MunicipalityHelsingfors
Current registered entries
2014-09-02VAT-liable for business activity in Tax Administration (VAT Register)
2014-09-08Registered in Tax Administration (Prepayment Register)
2014-09-23Registered in Patent and Registration Office (Trade Register)
2014-10-01Registered in Tax Administration (Employer Register)
2014-10-01Registered in Tax Administration (Tax Administration)
2021-08-26VAT-obliged for the transfer of rights to use immovable property in Tax Administration (VAT Register)
Responsible people
Public role relationships materialized from source observations.
Hämäläinen Olli ValtteriToimitusjohtajaSources: 5 · Confidence: 78%
Hämäläinen Olli ValtteriVarsinainen jäsenSources: 2 · Confidence: 78%
Hämäläinen Liisa MaariaVarajäsenSources: 2 · Confidence: 78%
Kärnä Riku JuhaniTilintarkastajaSources: 2 · Confidence: 78%
Risk certificate
An open-data based company stability and risk signal.
BUSINESS.fi
BUSINESS.fi Luottoluokitus
Profile-specific risk signal based on open data
Automatic gradeNot a credit decision
A3
GoodRakennustoimisto O.Hämäläinen Oy
Grade unchangedA3 · new analysis 2026-10-17
72/100
Medium
Limited financial evidenceRegistry and statistics based
Financial development is mostly stable or mixed.
4 comparable periodsRevenueVolatile
ProfitabilityImproving · 2 consecutive periods
SolvencyNot enough history
LiquidityNot enough history
DelayedBased on observed PRH financial period end and registration dates. This descriptive evidence does not change the v0.14 score.
4 observed filings182 days after period end
244 days after period end
2 consecutive periods
Supporting factors
- Active registered status
- A newer financial statement filing has been reported
- Long registry continuity
Risk factors to note
- Sufficient structured financial metrics are not available
Automatic assessment developmentChanges are derived from evidence differences between persisted automatic assessments.
5 assessmentsA3
2026-10-1772/100 · v0.15
A3 → A3 · -1 pointsA3
2026-09-15 02:5573/100 · v0.14
A3 → A3- Evidence strengthened: another PRH/XBRL statement was added to the financial series (2024-08-31).
A3
2026-09-1473/100 · v0.14
A3 → A3- Revenue: Volatile
- Profitability: Improving
A3
2026-09-1473/100 · v0.13
Oldest retained automatic assessment in this comparisonA3
2026-10-17
open-risk-grade-v0.15
The grade uses registry, industry, and regional signals because sufficient source-backed financial metrics are not available for a Tier 1 assessment.
Risk context
When sufficient source-backed financial metrics are not available for a Tier 1 assessment, BUSINESS.fi shows registry, industry, and regional context.
Industry riskmedium
62/100
Industry context is medium based on normalized open statistical inputs.
Age and continuityVakiintunut
80/100
The company has about 12 years of registry continuity.
Registry and status signalsVakaa
80/100
Registry history, filing recency, and active register markings are still limited or mixed.
Events & news
Verified events and sourced external company news in one timeline.
Risk grade updatedRisk gradeEvidence verified
14 Sept 2026 · BUSINESS.fi / Opterom LuottoluokitusAutomatic grade A3.Registry timeline
Trade register notifications shown on a timeline.
16 register eventsLatest event: 2026-03-12
Financial statements availability
Available financial statement periods and PRH source filings.
4 financial statement periodsLatest financial period: 2024-08-31
Profile source and ownership
Profile based on public registry data
BUSINESS.fi has created this profile from public company information. Source data updated 2025-12-31.
This company profile has not been claimed yet
Rakennustoimisto O.Hämäläinen Oy shows public core facts. A company representative can claim the profile, update public information, and access owner tools.