Technical Bulletin #25-11, 12.17.25 Subject: Subdivision Grading Plans (SDGPs) Submission Procedure and Requirements Summary: This technical bulletin supersedes Technical Bulletin 24-03 issued on March 19, 2024, to clarify the county's policies and procedures associated with Subdivision Grading Plans (SDGPs). This amendment updates the policy related to home improvement projects on lots that are fully stabilized, sold, and occupied, providing revised guidance on how such improvements are reviewed and permitted under the SDGP process. Effective Date: Immediately. Background: Subdivisions in Fairfax County are regulated by County Code Chapter 101. Subdivision construction plans are required by 101-2-4 prior to subdivision approval. This plan is commonly called a "Subdivision Plan" and is submitted as plan type "SD." After SD approval, the final plat may be approved and recorded. Individual lot grading plans are required after overall subdivision plan approval and before the start of construction on the building lots. Subdivision Lot Grading Plans, or "SDGP," demonstrate compliance of each building lot within the SD. SDGP submissions propose detailed designs for single-family homes associated with active, bonded, Subdivision Plans. This technical bulletin documents the submission procedure and requirements for SDGPs. Submitting a quality plan that fulfills all requirements creates an opportunity for expeditious approval by staff. LDS has published an SDGP Checklist to promote consistency in plan preparation and review. Though strongly encouraged, use of the checklist is optional and may be used at the discretion of the submitter. This bulletin also discusses common issues experienced at building permit application, occupancy, and bond release. State regulations allow a project to be considered separately from the original common plan of development once the initial land-disturbing activity associated with the common plan has been completed for a specific parcel. Any subsequent development or redevelopment on that parcel is then considered a new plan of development subject to applicable regulations. For example, once a dwelling has been constructed and occupied, and the land has been stabilized, any future construction on that lot—such as additions, accessory structures, or redevelopment—will be evaluated independently when calculating land disturbance. We recognize the challenges in enforcing development restrictions once a project is no longer under the control of the original developer. Accordingly, we have updated this publication to provide revised guidance on how home improvement projects will be reviewed and permitted after a lot has been fully stabilized, sold, and occupied. | 
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