John Sisk and Son Wilton Works is the named builder on 32 project starts in 2025, ranking #5 of 2,991 companies. Busiest in Dublin (17), Cork (8), Longford (3).
Registered company JOHN SISK & SON (HOLDINGS) LIMITEDCompany no. 241278Last accounts filed year to 31 December 2025
project starts in 202532counties6busiest company#5
Co. CorkMaterial alteration · Completion certificate 27 Mar 2025
2025
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Counted from project starts naming John Sisk and Son Wilton Works as builder, by start date. One project can start in several phases (fit-outs, substations and so on). A start shows work beginning; it does not mean contracts are still open.
Company details from Companies Registration Office open data (CC BY 4.0), checked 26 September 2026.