Her main source of income were regular orders from Mundie's, a Manchester firm, however these ended after the Irish War of Independence, during which she hid republican guns in her workroom.
After this she considered closing the studio, but a commission from Count John McCormack to create a pectoral cross for the Archbishop Carbery of Baltimore, USA, changed her mind.
In the 1920s, she was commissioned to produce numerous items, including a monstrance, tabernacle, sanctuary lamp, and frames for altar cards for St Patrick's catholic church, San Francisco, USA.
The monstrance was produced in collaboration with Newland Smith, and was exhibited in the National Museum of Ireland (NMI) in July 1927, before being shipped to San Francisco.
[3] One of her most significant pieces was commissioned by Alice Stopford Green, it was to create a metal casket for a scroll with the signatures of the Free State senators.
[4] Newland Smith reviewed the casket, described Cranwill was a "designer and craftswoman who understands the national Irish style and can interpret it, create anew within it, and add to the old and delightful forms a personality and expression quite new".
Cranwill designed the standards for the Irish Free State Army, which were produced by Cuala Industries, and were first borne on St Patrick's day 1937.
She left her Killiney home and workshop, living the last ten years of her life in the Alexandra Guild House, Leinster Road West, Dublin.