This paper explores the interface between immigration and compliance with planning regulations using data from interviews and a focus group with senior planning enforcement officers in London. The data reveals distinctive issues that arise for immigrants' compliance with planning regulations, specific types of residential, commercial and cultural breach that occur with immigration, and operational issues that arise when investigating and resolving planning breaches involving immigrant communities, including gender sensitivities and language barriers. The paper concludes that despite difficulty distinguishing immigration from ethnicity, faith or religious affiliation, there are important normative and principled aspects of i ig a ts compliance with planning regulations. .