What does ISOBUILDING do?

ISOBUILDING is a construction company in Londerzeel. Private Limited, started on 4 December 2013, 1 establishment.

What is the address of ISOBUILDING?

The registered office of ISOBUILDING is located at Patattestraat 2, 1840 Londerzeel.

Is ISOBUILDING still active?

Yes. According to the CBE (17 September 2026) ISOBUILDING is active, legal situation “Normale toestand”, started on 4 December 2013.

Is ISOBUILDING registered on Peppol?

Yes, ISOBUILDING is registered on the Peppol network with ID 0208:0542759738.

What is the enterprise number of ISOBUILDING?

The enterprise number of ISOBUILDING is BE0542759738.

When was ISOBUILDING founded?

ISOBUILDING was founded on 4 December 2013.

Who are the directors of ISOBUILDING?

According to the 2025 annual accounts, the directors of ISOBUILDING are: Aurel Rusu.

Is ISOBUILDING a reliable company?

Databakkes does not pass judgement; this is what the sources say: Active according to the CBE since 4 December 2013; 5 annual accounts filed, latest fiscal year 2025; 1 directors known from the annual account.

How much profit did ISOBUILDING make in 2025?

ISOBUILDING posted a profit after taxes of € 11,489 in financial year 2025.

What is the revenue of ISOBUILDING?

As a small company, ISOBUILDING is not required to publish revenue in its annual accounts. In financial year 2025, its added value was € 42,825.

ISOBUILDING (Private Limited) - Londerzeel - BE0542759738

Dossier ISOBUILDING, printed on 17 September 2026 from databakkes.be/en/0542759738/isobuilding. Sources: CBE, National Bank of Belgium, Belgian Official Gazette.

Financials

Financial year 2025

ISOBUILDING from Londerzeel, company number BE0542759738, closed financial year 2025 with a result of € 11,489 after tax. For that financial year ISOBUILDING recorded a gross margin of € 42,825 and equity of € 185,297. Compared with financial year 2024, the result moved from € 10,015 to € 11,489. Profitable, and profit is growing. The buffer is growing. A strong own buffer against the debts. The most recent annual accounts were filed with the National Bank of Belgium on July 1, 2026.

What it is worth Growing

€ 185,297

▲ 7% vs 2024

Assets minus debts, by the books. What is left if everything were sold and paid today.

Profit Growing

€ 11,489

▲ 15% vs 2024

Profit after tax over the fiscal year.

Cash in the bank

€ 6,783

▼ 42% vs 2024

Cash and bank balances on the last day of the fiscal year.

Where the profit goes Growing

Stays in the company

No dividend for 2025. Retained profit grew to € 166,697.

People and assets in 2025

Full-time equivalents estimate The annual accounts report no full-time equivalents. A micro company with one active director is usually run by that person; this is an assumption, not a figure from the source.

≈ 1

No payroll staff. One director, so that person most likely runs the business.

Vehicles and equipment

€ 21,109

▼ 30% vs 2024

Of which on lease € 18,614.

Debts at end 2025

Bank debt ≈ 3 years to go The accounts give the long-term loan and the part due within the year. The remainder divided by that part is the number of years at an equal pace; a new loan or early repayment changes it.

€ 15,025

▼ 26% vs 2024

€ 5,755 is repaid this year. At this pace the long-term loan is gone in ≈ 3 years.

Owed to suppliers

€ 96,733

▲ 186% vs 2024

Supplier invoices still open on the last day of the fiscal year.

Taxes and wages

€ 27,150

▼ 40% vs 2024

Taxes, VAT and social contributions still to pay.

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Key figures per fiscal year Download key figures (CSV)
	2022	2023	2024	2025	Change 2024 → 2025
Gross margin	€ 45,415 Gross margin 2022: € 45,415 First fiscal year in the series	€ 37,996 Gross margin 2023: € 37,996 ▼ 16% vs 2022 (€ 45,415) Unfavourable step	€ 52,583 Gross margin 2024: € 52,583 ▲ 38% vs 2023 (€ 37,996) Favourable step	€ 42,825 Gross margin 2025: € 42,825 ▼ 19% vs 2024 (€ 52,583) Unfavourable step	▼ 19%
Profit after taxes	€ -31,827 Profit after taxes 2022: € -31,827 First fiscal year in the series	€ 16,873 Profit after taxes 2023: € 16,873 ▲ € 48,700 vs 2022 (€ -31,827) Favourable step	€ 10,015 Profit after taxes 2024: € 10,015 ▼ 41% vs 2023 (€ 16,873) Unfavourable step	€ 11,489 Profit after taxes 2025: € 11,489 ▲ 15% vs 2024 (€ 10,015) Favourable step	▲ 15%
Equity	€ 140,719 Equity 2022: € 140,719 First fiscal year in the series	€ 163,792 Equity 2023: € 163,792 ▲ 16% vs 2022 (€ 140,719) Favourable step	€ 173,807 Equity 2024: € 173,807 ▲ 6% vs 2023 (€ 163,792) Favourable step	€ 185,297 Equity 2025: € 185,297 ▲ 7% vs 2024 (€ 173,807) Favourable step	▲ 7%
Total debts	€ 92,304 Total debts 2022: € 92,304 First fiscal year in the series	€ 175,130 Total debts 2023: € 175,130 ▲ 90% vs 2022 (€ 92,304) Unfavourable step	€ 99,524 Total debts 2024: € 99,524 ▼ 43% vs 2023 (€ 175,130) Favourable step	€ 158,072 Total debts 2025: € 158,072 ▲ 59% vs 2024 (€ 99,524) Unfavourable step	▲ 59%
Cash	€ 18,353 Cash 2022: € 18,353 First fiscal year in the series	€ 20,057 Cash 2023: € 20,057 ▲ 9% vs 2022 (€ 18,353) Favourable step	€ 11,791 Cash 2024: € 11,791 ▼ 41% vs 2023 (€ 20,057) Unfavourable step	€ 6,783 Cash 2025: € 6,783 ▼ 42% vs 2024 (€ 11,791) Unfavourable step	▼ 42%
Retained profit	€ 128,319 Retained profit 2022: € 128,319 First fiscal year in the series	€ 145,192 Retained profit 2023: € 145,192 ▲ 13% vs 2022 (€ 128,319) Favourable step	€ 155,207 Retained profit 2024: € 155,207 ▲ 7% vs 2023 (€ 145,192) Favourable step	€ 166,697 Retained profit 2025: € 166,697 ▲ 7% vs 2024 (€ 155,207) Favourable step	▲ 7%
Bank debt	€ 0 Bank debt 2022: € 0 First fiscal year in the series	€ 25,472 Bank debt 2023: € 25,472 Unchanged (€ 0) Unfavourable step	€ 20,418 Bank debt 2024: € 20,418 ▼ 20% vs 2023 (€ 25,472) Favourable step	€ 15,025 Bank debt 2025: € 15,025 ▼ 26% vs 2024 (€ 20,418) Favourable step	▼ 26%
Balance sheet total	€ 233,023 Balance sheet total 2022: € 233,023 First fiscal year in the series	€ 338,922 Balance sheet total 2023: € 338,922 ▲ 45% vs 2022 (€ 233,023) Unchanged	€ 273,331 Balance sheet total 2024: € 273,331 ▼ 19% vs 2023 (€ 338,922) Unchanged	€ 343,368 Balance sheet total 2025: € 343,368 ▲ 26% vs 2024 (€ 273,331) Unchanged	▲ 26%

Key figures of ISOBUILDING, fiscal years 2022 to 2025, from the annual accounts filed with the National Bank of Belgium.Next annual account (fiscal year 2026) expected before 31 July 2027.

What happened to ISOBUILDING?

What happened at ISOBUILDING in recent years, according to the Belgian Official Gazette, the CBE and the National Bank:

Jul 1, 2026 New annual accounts for financial year 2025: profit of € 11,489 (▲ 15% vs 2024). Source: NBB ↗
Dec 4, 2013 New establishment in Londerzeel. KBO
Dec 4, 2013 Start of the company according to the CBE. KBO

In short

From € 31,827 loss in 2022 to € 11,489 profit in 2025.

Paid € 86,791 in corporate taxes since 2022.

Best year ever: 2023, with € 16,873 profit.

Original PDFs at the National Bank ↗

A new publication or filing at ISOBUILDING? We notify you, reason included.

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My folder 3 companies

De Lijn 8 June 2026 New annual account 2025

filed on 8 June 2026

What was left

€ 20 k ▼ 91%
Money in the bank

€ 178 k ▼ 98%

Open the dossier →
NMBS 8 June 2026 New annual account 2025 What was left ▼ 80%
bpost 18 May 2026 New annual account 2025 What was left from loss to profit

Real filings at the National Bank

Management

Aurel Rusu

ISOBUILDING

Behind ISOBUILDING is Aurel Rusu.

See the full network in the app

Directors

According to the 2025 annual accounts

Aurel Rusu

Director

Establishments

Establishment units

Physical locations of this company

Registered office

Patattestraat 2

1840 Londerzeel

Who else lives here?

A building full of entrepreneurs or one very busy letterbox? Another 1 companies are registered at this address.

All companies at this address →

Bouwplek

€ 6,390 gross margin · 2025

What is an establishment unit? An establishment unit is a geographically identifiable place where activities of the enterprise are carried out.

Details

Company number

0542.759.738

VAT number

BE 0542.759.738

Registered office

Patattestraat 2, 1840 Londerzeel

Names & denominations

ISOBUILDING

Enterprise type

Rechtspersoon

Legal form

Private limited company

Legal situation

Normale toestand

Start date

4 December 2013

Peppol

Active · Active since 24 Nov 2025

Activities · NACE

Algemene bouw van residentiële gebouwen

Overige werkzaamheden in verband met de afwerking van gebouwen

Activiteiten van bouwarchitecten

Metselwerk

Overige reiniging van gebouwen; industriële reiniging

Overige gespecialiseerde bouwactiviteiten, neg

Uitvoeren van metsel- en voegwerken

Gevelreiniging

View on CBE Public ↗ Annual accounts (NBB) ↗

ISOBUILDING

Financials

What happened to ISOBUILDING?

Know what changes at your customers, suppliers and competitors. Without reading an annual account.

Management

Directors

Establishments

Establishment units

Who else lives here?

Details

Frequently asked questions