when london county council was dissolved in 1964, stjernstedt began working for lambeth london borough council under ted hollamby. there, she was in charge of the design team for a variety of projects that included the masterplan for the central hill estate, another landscaped, award-winning council estate. in 1967, she moved to the housing development directorate at the department of environment working under the architect, pat tindale. she helped tinsdale with her research on layouts and on timber framed housing working closely with the building regulations department. stjernstedt retired in 1972 at the age of 60 and moved to wales where she continued to work on modest alterations for the cottages of the local inhabitants.