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The above diagram shows the color scheme of the layout in the main result page. The parent entities and officers are those entities, including individual and legal persons, have significant controls over the company in focus. The offspring entities and appointments are those entities that the company in focus can influence on.

Clicking the links on parent entities or officers, and offspring entities or managed companies will put them in focus and show upstream or downstream connections. In general, ascendant entities can be found by moving toward upstream, and descendant entities are by toward downstream. In this way, progenitor entities such as grandparent companies (parents of parent), sibling companies (children of parent), partner companies (parents of child), and progeny entities such as grandchild companies (children of child) can be found easily.

Parent entities and officers 5
  • 1
    Mcdermott, Kevin William
    Builder born in November 1966
    Individual (2 offsprings)
    Officer
    ~ 2004-02-13
    OF - Director → CIF 0
  • 2
    Mcdermott, Hilary
    Individual (2 offsprings)
    Officer
    ~ now
    OF - Secretary → CIF 0
  • 3
    Mcdermott, Cavan Richard
    Born in August 1948
    Individual (5 offsprings)
    Officer
    (before 1999-12-31) ~ now
    OF - Director → CIF 0
  • 4
    Mcdermott, William G
    Builder born in May 1928
    Individual (2 offsprings)
    Officer
    ~ 2000-12-25
    OF - Director → CIF 0
  • 5
    RJM (NI) LIMITED
    NI049048
    10, Upper Croft Road, Holywood, Northern Ireland
    Active Corporate (3 parents, 1 offspring)
    Person with significant control
    2016-04-06 ~ now
    PE - Ownership of shares – 75% or moreCIF 0
parent relation
Company in focus

R. J. MCDERMOTT & SONS (BUILDERS) LIMITED

Period: 1951-08-27 ~ now
Company number: NI003011
Registered name
R. J. MCDERMOTT & SONS (BUILDERS) LIMITED - now
Standard Industrial Classification
42990 - Construction Of Other Civil Engineering Projects N.e.c.
41202 - Construction Of Domestic Buildings
Brief company account
Average Number of Employees
12022-07-01 ~ 2023-06-30
12021-07-01 ~ 2022-06-30

  • R. J. MCDERMOTT & SONS (BUILDERS) LIMITED
    Info
    Registered number NI003011
    10 Upper Croft Road, Holywood, Co.down BT18 0HJ
    PRIVATE LIMITED COMPANY incorporated on 1951-08-27 (74 years 7 months). The status of the company number is Active.
    The last date of confirmation statement was made at 2025-12-31
    CIF 0
child relation
Offspring entities and appointments 0
  • Not found in our database.

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Contains public sector information retrieved at 22 March 2026 and licensed under the Open Government Licence v3.0.