The source desk.

Official source desk for the complete investor library. Review dated October 24, 2026; use the source’s scope and effective date, and confirm current project requirements.

• Recorder of Deeds: tax rates and recording questionsDC Office of Tax and Revenue · Guidance reviewed 2026-10-24
• DC Code §42-1103: recordation taxDC Law Library · Guidance reviewed 2026-10-24
• DC Code §47-903: transfer taxDC Law Library · Guidance reviewed 2026-10-24
• Permitting in the District of ColumbiaDC Department of Buildings · Guidance reviewed 2026-10-24
• Certificate of Occupancy and zoning questionsDC Department of Buildings · Guidance reviewed 2026-10-24
• Building permits for historic propertyDC Office of Planning · Guidance reviewed 2026-10-24
• DC Code §42-3404.02b: sale and excluded propertiesDC Law Library · Guidance reviewed 2026-10-24
• DC Code §42-3404.10: accommodations with 2 through 4 unitsDC Law Library · Guidance reviewed 2026-10-24
• DC Code §42-3404.09: single-family accommodationsDC Law Library · Guidance reviewed 2026-10-24
• Rental conversion and sale forms; current RENTAL Act guidanceDC Department of Housing and Community Development · Guidance reviewed 2026-10-24
• RENTAL Amendment Act of 2025DC Law Library · Guidance reviewed 2026-10-24
• Housing in Downtown: program and applicant resourcesDMPED · Guidance reviewed 2026-10-24
• Office to Anything: nonresidential conversion programDMPED · Guidance reviewed 2026-10-24
• BEPS revised guidebook version 1.2 announcementDC Department of Energy & Environment · Guidance reviewed 2026-10-24
• Real Property GIS Program and assessment map searchDC Office of Tax and Revenue · Guidance reviewed 2026-10-24
• Online resources: property, permit and inspection recordsDC Department of Buildings · Guidance reviewed 2026-10-24
• RRP requirements for for-profit residential renovatorsUS Environmental Protection Agency · Guidance reviewed 2026-10-24
• September 2026 housing reports: availability and report libraryGreater Capital Area Association of REALTORS · Guidance reviewed 2026-10-24
• PropertyQuest: planning and property researchDC Office of Planning · Guidance reviewed 2026-10-24
• Lead Renovation, Repair and Painting programUS Environmental Protection Agency · Guidance reviewed 2026-10-24
• HPRB vs HPO reviewDC Office of Planning · Guidance reviewed 2026-10-24
• Georgia Avenue–Petworth Metro Station Area and Corridor PlanDC Office of Planning · Guidance reviewed 2026-10-24
• Grant Circle Historic District: official map and recordsDC Office of Planning · Guidance reviewed 2026-10-24
• Housing-provider registration and exemption guidanceDC RentRegistry / DHCD · Registration portal reviewed 2026-10-24; actual filing status must be verified in the portal
• Housing business licensingDC Department of Licensing and Consumer Protection · Official agency entry point; confirm current category and project instructions directly
• Housing in Downtown program guide, October 2025DMPED · Guidance reviewed 2026-10-24
• Office-to-Anything: criteria and current guideline linksDMPED · Guidance reviewed 2026-10-24
• Central Washington Activation Program Guidelines, May 2025 updateDMPED · Guidance reviewed 2026-10-24
• DC construction codes and official amendmentsDC Department of Buildings · Guidance reviewed 2026-10-24
• Construction inspection servicesDC Department of Buildings · Guidance reviewed 2026-10-24
• Third-party review and inspection programDC Department of Buildings · Guidance reviewed 2026-10-24
• Raze permit processDC Department of Buildings · Guidance reviewed 2026-10-24
• Public-space permit applicationsDistrict Department of Transportation · Guidance reviewed 2026-10-24
• Urban forestry and tree permitsDistrict Department of Transportation · Guidance reviewed 2026-10-24
• Construction permits and developer servicesDC Water · Guidance reviewed 2026-10-24
• New construction and remodeling servicesPepco · Service entry point checked 2026-10-24; interactive project instructions must be confirmed directly
• Structure of the 2016 zoning regulationsDC Office of Zoning · Guidance reviewed 2026-10-24
• Board of Zoning AdjustmentDC Office of Zoning · Guidance reviewed 2026-10-24
• Neighborhood planningDC Office of Planning · Guidance reviewed 2026-10-24
• Maps of the wards of the District of ColumbiaDC Office of Planning · Guidance reviewed 2026-10-24
• DC historic districts and boundary mapsDC Office of Planning · Guidance reviewed 2026-10-24
• Old Georgetown Board reviewUS Commission of Fine Arts · Guidance reviewed 2026-10-24
• Spring Valley environmental background and agency resourcesDC Department of Energy & Environment · Historical agency background reviewed 2026-10-24; obtain current parcel-specific guidance directly
• Chevy Chase Small Area PlanDC Office of Planning · Guidance reviewed 2026-10-24
• Ivy City Small Area PlanDC Office of Planning · Guidance reviewed 2026-10-24
• Southwest Neighborhood PlanDC Office of Planning · Guidance reviewed 2026-10-24
• Soil erosion and sediment control overviewDC Department of Energy & Environment · Guidance reviewed 2026-10-24
• Stormwater regulations and guidebook, including 2025 amendmentsDC Department of Energy & Environment · Guidance reviewed 2026-10-24
• Green Area Ratio overviewDC Department of Energy & Environment · Guidance reviewed 2026-10-24
• High-impact stormwater retention creditsDC Department of Energy & Environment · Guidance reviewed 2026-10-24
• Brownfields: all appropriate inquiriesUS Environmental Protection Agency · Guidance reviewed 2026-10-24
• Mold cleanup and remediationUS Environmental Protection Agency · Guidance reviewed 2026-10-24
• Flood Map Service CenterFederal Emergency Management Agency · Guidance reviewed 2026-10-24
• Small business insurance resourcesDC Department of Insurance, Securities and Banking · Guidance reviewed 2026-10-24
• Workers compensation programDC Department of Employment Services · Guidance reviewed 2026-10-24
• Rent control and exemptionsDC Department of Housing and Community Development · Guidance reviewed 2026-10-24
• Rental housing: rent stabilization and possessionDC Law Library · Guidance reviewed 2026-10-24
• Short-term rental regulationDC Law Library · Guidance reviewed 2026-10-24
• Housing Choice Voucher landlord resourcesDistrict of Columbia Housing Authority · Guidance reviewed 2026-10-24
• Housing discrimination and fair housingDC Office of Human Rights · Guidance reviewed 2026-10-24
• Inclusionary zoning for residential developersDC Department of Housing and Community Development · Guidance reviewed 2026-10-24
• District Opportunity to Purchase ActDC Department of Housing and Community Development · Guidance reviewed 2026-10-24
• DC Condominium ActDC Law Library · Guidance reviewed 2026-10-24
• Condominium registration, offering statement and cancellationDC Law Library · Guidance reviewed 2026-10-24
• Conversion condominium reports and tenant noticesDC Law Library · Guidance reviewed 2026-10-24
• Publication 544: sales and other dispositions of assetsInternal Revenue Service · Guidance reviewed 2026-10-24
• Publication 527: residential rental propertyInternal Revenue Service · Guidance reviewed 2026-10-24
• Like-kind exchanges: real estate tax tipsInternal Revenue Service · Guidance reviewed 2026-10-24
• Real property tax questionsDC Office of Tax and Revenue · Guidance reviewed 2026-10-24
• Real property tax ratesDC Office of Tax and Revenue · Guidance reviewed 2026-10-24
• Real property assessment appealsDC Office of Tax and Revenue · Guidance reviewed 2026-10-24
• Rebates and energy-saving servicesDC Sustainable Energy Utility · Guidance reviewed 2026-10-24
• After-hours construction permitDC Department of Buildings · Guidance reviewed 2026-10-24
• Construction General Permit and current modificationsUS Environmental Protection Agency · Guidance reviewed 2026-10-24
• Brookland-CUA Metro Station Small Area PlanDC Office of Planning · Guidance reviewed 2026-10-24
• Ward 7 planning implementation projectsDC Office of Planning · Guidance reviewed 2026-10-24
• Status of plan implementationDC Office of Planning · Guidance reviewed 2026-10-24
• Ward 1: official planning contextDC Office of Planning · Guidance reviewed 2026-10-24
• Ward 2: official planning contextDC Office of Planning · Guidance reviewed 2026-10-24
• Ward 3: official planning contextDC Office of Planning · Guidance reviewed 2026-10-24
• Ward 4: official planning contextDC Office of Planning · Guidance reviewed 2026-10-24
• Ward 5: official planning contextDC Office of Planning · Guidance reviewed 2026-10-24
• Ward 6: official planning contextDC Office of Planning · Guidance reviewed 2026-10-24
• Ward 7: official planning contextDC Office of Planning · Guidance reviewed 2026-10-24
• Ward 8: official planning contextDC Office of Planning · Guidance reviewed 2026-10-24
• Comprehensive small business insurance guideDC Department of Insurance, Securities and Banking · Guidance reviewed 2026-10-24

Not every official record proves every property fact. A map, application, issued permit, inspection, occupancy authorization and tax classification answer different questions.