Browse 41,383 construction companies in Ireland — registry-sourced from CRO, scoped to NACE 41, 42 and 43. Each record carries up to up to 500 firmographic attributes — from CRO Number and registered address to revenue, headcount and corporate group structure. The largest by revenue are BALFOUR BEATTY GROUP LIMITED ($4.8B), NISHIMATSU CONSTRUCTION CO LIMITED ($3.1B) and GREENCORE HOLDINGS (IRELAND) LIMITED ($1.8B).
Top companies
The largest construction companies in Ireland by revenue are BALFOUR BEATTY GROUP LIMITED ($4.8B), NISHIMATSU CONSTRUCTION CO LIMITED ($3.1B) and GREENCORE HOLDINGS (IRELAND) LIMITED ($1.8B). The directory below ranks them — sort any column, or filter by sub-sector, company size and region.
Last updated June 2026.
Every Irish construction companies record with all attributes, by API, bulk export or CRM enrichment.
Showing 25 of 41,383 Irish construction companies· click a column to sort, or a company for its full record
| Construction of residential and non-residential buildings | 15,774 | $4.8B | |
| Construction of bridges and tunnels | 400 | $3.1B | |
| Construction of residential and non-residential buildings | 11,741 | $1.8B | |
| Electrical installation | 610 | $1.2B | |
| Construction of residential and non-residential buildings | 692 | $1.2B | |
| Development of building projects | 119 | $790M | |
| Construction of residential and non-residential buildings | 1,153 | $776M | |
| Development of building projects | 508 | $677M | |
| Construction of residential and non-residential buildings | 478 | $667M | |
| Construction of residential and non-residential buildings | 424 | $666M | |
| Construction of residential and non-residential buildings | 345 | $561M | |
| Other specialised construction activities n.e.c. | 1,888 | $529M | |
| Construction of residential and non-residential buildings | 886 | $479M | |
| Electrical installation | 1,158 | $456M | |
| Development of building projects | 701 | $448M | |
| Construction of residential and non-residential buildings | 1,297 | $424M | |
| Electrical installation | 52 | $410M | |
| Electrical installation | 7,190 | $402M | |
| Construction of residential and non-residential buildings | 365 | $393M | |
| Construction of residential and non-residential buildings | 340 | $356M | |
| Other specialised construction activities n.e.c. | 410 | $299M | |
| Construction of residential and non-residential buildings | 129 | $296M | |
| Construction of residential and non-residential buildings | 734 | $286M | |
| Other specialised construction activities n.e.c. | 500 | $274M | |
| Development of building projects | 495 | $274M |
This is a sample. The full database holds 41,383 Irish construction companies, each with every attribute in the dictionary below.
Database overview
Distributions across all 41,383 construction companies in Ireland — registry-sourced from CRO and refreshed daily.
These distributions are computed from the full Irish construction companies database, not the sample above.
Data coverage
Legal name, registered address, NACE sub-sector, legal form, founding year and website. Every record is keyed to its CRO Number — the stable CRO identifier that survives name changes and rebrands, making it the most reliable CRM deduplication key for Ireland data.
Each company is geocoded to GPS coordinates covering its registered seat and operating locations across Ireland, with a precision level on every point — useful for territory planning and proximity targeting.
Records carry the CRO Number and, where applicable, the VAT registration number, with a flag for when the two coincide. These are the cleanest match keys for enriching lists and cross-referencing against the national tax authority and your CRM.
InfobelPRO resolves the corporate hierarchy — parent, subsidiaries and the size of the worldwide corporate family — so sales and compliance teams can see who controls an entity before engaging or onboarding it.
Annual revenue in local currency, EUR and USD, employee headcount and founding year, with multi-year history where filed. Figures are sourced from CRO filings and carry an Actual-or-Modeled reliability flag.
Data dictionary
The full field catalogue behind each record. Contact data (email, phone, executives) is part of the licensed dataset but is never displayed on this page.
Source comparison
CRO gives you legal registration data. InfobelPRO adds the commercial intelligence sales, marketing and compliance teams actually need.
| Attribute | CROFree official registry | InfobelPRO |
|---|---|---|
| CRO Number | Yes | Yes — on 99.9% of records |
| Legal name & registered address | Yes | Yes |
| Company status (HQ / branch) | Yes | Yes — daily sync |
| NACE sub-sector classification | Yes | Yes — up to 6 codes |
| Annual revenue (local / EUR / USD) | Filings only | Yes — multi-currency |
| Employee count | No | Yes |
| Decision-maker contacts | No | Yes — licensed |
| Geocoded coordinates | No | Yes |
| Corporate group structure | Filings only | Yes — full hierarchy |
| API access | No | Yes — REST API |
| Bulk export (CSV / JSON / Parquet) | No | Yes |
| Update frequency | Periodic (filings) | Daily sync |
FAQ
API access, bulk export or CRM enrichment — 41,383 records with up to up to 500 attributes each.
Explore more
Related directories
See all company directories in Ireland, explore the full Ireland business database In the US classification, related SIC codes include SIC 1521 — General Contractors-Single-Family Houses, SIC 1611 — Highway and Street Construction, Except Elevated Highways and SIC 1389 — Oil and Gas Field Services, Not Elsewhere Classified., or see how Ireland fits into the wider Europe business database.
