Section 15: Duration of sanction of building permit
The Uttar Pradesh (Regulation of Building Operations) Rules, 1985State Rules of Uttar Pradesh · 1958
(I) The sanction once accorded shall remain valid for a period of three years during \which period the applicant shall complete the work and submit a completion certificate, duly countersigned by the qualified technical hand.
(2) The Prescribed Authority, may, however, on sufficient grounds in this behalf extend this period of three years and may revalidate the permit for one year at a time subject to a maximum of three years.
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