Zoning, building permits and septic rules in Gaithersburg, Maryland

Gaithersburg’s own rules

• Building permitRequired

  New residential construction, demolition and relocation inside Gaithersburg city

  • Separate permits also required for decks, electrical, fences, garages, gazebos, improvements, mechanical, sheds, solar, pools
  • HOA approval letters should be submitted with the application where applicable

  “residential building permits are required for all new residential construction, demolition and relocation.”

• Local zoningPresent

  Land inside Gaithersburg city limits

  • Chapter 24 (Zoning) revised through the Retool Gaithersburg project, approved July 15, 2024
  • Chapter 24 is also on Municode, which takes precedence over the user-friendly version

  “the city of gaithersburg has comprehensively revised chapter 24 of the city code, zoning, through an 18 month process referred to as retool.”

• Zoning districtsPublished

  Zoning districts inside Gaithersburg city

  • Districts are in Articles 3 and 4 of Chapter 24; use tables with use-specific standards in Article 5

  “view the city zoning map to identify zoning classifications for specific properties.”

• Permit feesPublished

  Planning application fees inside Gaithersburg city

  • Zoning page links a FY 2025 schedule; residential permits page links an FY 2027 schedule of fees; amounts not extracted

  “access the city fee schedule to review the various planning application fees.”

• Permit processPartial

  Planning applications inside Gaithersburg city

  • Decision matrix published; building permit steps not fully reviewed

  “view a decision matrix to understand how various planning applications are processed.”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission; ask Gaithersburg or Montgomery County directly.

• Owner-builder exemption — Owner-builder exemption inside Gaithersburg city
• Building code adopted — Building code inside Gaithersburg city
• Inspections — Inspections inside Gaithersburg city
• Certificate of occupancy — Certificate of occupancy inside Gaithersburg city
• Minimum dwelling size — Minimum dwelling size inside Gaithersburg city

Each answer was extracted from an official source and independently re-checked against that source by a second reviewer. That is an evidence check, not legal advice. Rules change; confirm with the authority before you buy or build.

Off-grid gear

Going off-grid in Gaithersburg means bringing your own water and power. The kit we’d start with:

• Water Crystal Quest Filter any source — well, rain, or creek — to drinking-clean.
• Power Bluetti Solar generators and home battery backup for living off the grid.
• Septic Soil percolation test kit Run your own perc test before paying an engineer — the first thing a septic office asks about.
• Water Well water test kit Bacteria, nitrates, hardness — know what the well on a parcel is really pumping.

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