The use of holy water by lay people in at least one blessing should be encouraged, according to the Directory on Popular Piety and the Liturgy:
“Blessing of the Family Table
150. … Among the pious exercises connected with Easter Sunday, mention must be made of the traditional blessing of eggs, the symbol of life, and the blessing of the family table; this latter, which is a daily habit in many Christian families that should be encouraged
(Footnote 155: Cf. RITUALE ROMANUM, De Benedictionibus, Ordo benedictionis mensae, cit., 782-784, 806-807.)
, is particularly important on Easter Sunday: the head of the household or some other member of the household, blesses the festive meal with Easter water which is brought by the faithful from the Easter Vigil.”
The full text is at vatican.va/roman_curia/congregations/ccdds/documents/rc_con_ccdds_doc_20020513_vers-direttorio_en.html .
Footnote 155 is referring to Book of Blessings, n. 1030-1032, 1054-1055.
The use of holy water in blessings by the laity is permitted by the liturgical book “Book of Blessings”.
Chapter 11 has the Order for the Blessing of a New Home. It may be led by a layperson. It requires the use of holy water:
“675. After the prayer of blessing, the minister sprinkles those present and the new home with holy water and, as circumstances suggest, during the sprinkling may say: Let this water call to mind our baptism into Christ, who has redeemed us by his death and resurrection.” (Book of Blessings, Liturgical Press, Minnesota, 1989, ISBN 0-8146-1875-8, page 242).
The Book of Blessings also permits the use of holy water by lay people in:
Chapter 1, the blessing of families and members of families (n. 59).
Chapter 21 blessing of the Various Means of Transportation (n, 869)
Chapter 24 blessing of tools or other equipment for work (n. 936)
Chapter 25 animals
There may be more.