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Verified CRO data Updated 2026-05-16

JOHN O'BRIEN BUILDERS LIMITED

● Active

Active Irish company in Mayo, incorporated 3 December 2020 — NACE 70.22 (business management consultancy), CRO 683903.

CRO 683903 Incorporated 3 Dec 2020 NACE 70.22 — Business management consultancy Mayo

Overview

John O'Brian Builders Limited is a civil engineering and construction company established in 1998 and based in County Clare, Ireland. The company operates in both public and private sectors, offering expertise in civil engineering, healthcare projects, new builds, refurbishments, demolition, marine engineering, and heritage projects. It has completed notable projects such as the neonatal unit at a maternity hospital in Limerick and a medical short stay unit. The business is described as multi-disciplined and has developed a strong presence in infrastructure and facility development across Ireland. Beyond registry-level identification, no further business details are publicly captured.

Location & registered address

Treenlaur
Tormakeady
Claremorris
Mayo
Claremorris
Mayo
Ireland

Industry classification

NACE Rev. 2 — 70.22 — Business management consultancy

Class 70.22 covers business and other management consultancy activities — strategic, financial, marketing, and operational consulting services.

→ All business management consultancy companies in Ireland In Mayo

Company facts

Sourced from Companies Registration Office (CRO)

Legal name

JOHN O'BRIEN BUILDERS LIMITED

CRO number

683903

Status

Active

Legal form

Ltd - Private Company Limited By Shares

Incorporated

3 December 2020

Operating years

6 years

NACE Rev. 2

Business management consultancy

Registered county

Mayo

Registered office

Treenlaur, Tormakeady, Claremorris,MAYO, Claremorris, MAYO, Ireland

Last annual return

31 December 2024

Last accounts

31 December 2024

Frequently asked questions

What does JOHN O'BRIEN BUILDERS LIMITED do?

John O'Brian Builders Limited is a civil engineering and construction company established in 1998 and based in County Clare, Ireland. The company operates in both public and private sectors, offering expertise in civil engineering, healthcare projects, new builds...

Where is JOHN O'BRIEN BUILDERS LIMITED based?

JOHN O'BRIEN BUILDERS LIMITED's registered office is at Treenlaur, Tormakeady, Claremorris, Mayo, Claremorris, Mayo, Ireland.

When was JOHN O'BRIEN BUILDERS LIMITED founded?

JOHN O'BRIEN BUILDERS LIMITED was incorporated with the Irish Companies Registration Office on 3 December 2020, more than 5 years ago.

Is JOHN O'BRIEN BUILDERS LIMITED still active?

Yes. The company is listed with the Companies Registration Office under status 'Normal' as of the most recent filing on 31 December 2024.

What is the CRO number for JOHN O'BRIEN BUILDERS LIMITED?

683903.

Where this data comes from

CRO Open Data data.gov.ie/dataset/companies-register Weekly All factual fields
AI synthesis Qwen3-4B-Instruct (locally hosted) 2026-05-16 Prose summary only

About this summary — the prose Overview above is generated by an LLM from the cited sources. Factual fields (CRO number, status, dates, address, NACE code) come directly from the Companies Registration Office. If you spot an error, please report it →

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