Montgomery County, MD · Montgomery County Zoning Ordinance (Chapter 59)
Town-scale Commercial/Residential zone. Allows a fuller mix of residential and commercial uses at a town-center scale.
Development standards in CRT
Maximum height
Set by the building type you propose -- the CRT Standard Method Development Standards table sets this per building type (detached house, duplex, townhouse, apartment), so no single figure is true for the whole zone — see Chapter 59 Div 4.5
Maximum lot coverage
Set by the building type you propose -- the CRT Standard Method Development Standards table sets this per building type (detached house, duplex, townhouse, apartment), so no single figure is true for the whole zone — see Chapter 59 Div 4.5
Minimum lot size
Set by the building type you propose -- the CRT Standard Method Development Standards table sets this per building type (detached house, duplex, townhouse, apartment), so no single figure is true for the whole zone — see Chapter 59 Div 4.5
Maximum height, Maximum lot coverage and Minimum lot size are banded in the ordinance — it depends on what you build or on the lot itself, so no single figure is true for the whole zone. The cited table is the authority; read the tier that matches your intended structure.
Mapped on Zoning Map
Read from Montgomery County Zoning Ordinance (Chapter 59), effective through 2026-02-03. Amendments adopted after that date (most recent 2026-04-13) are not yet reflected.
How complete is this market? Across 304,119 parcels we answer 60.0% of the 6 questions this site is built to answer, each with a source you can check. The rest are shown as “not recorded” rather than filled in — we would rather be short than wrong.
Permitted uses in CRT
AllowedSingle-Unit Living Permitted by right. Use Table, Sec. 3.1.6 (Chapter 59, Div 3.1), row 20, column CRT. Use-specific standards: Sec. 3.3.1.B.
AllowedTwo-Unit Living Permitted by right. Use Table, Sec. 3.1.6 (Chapter 59, Div 3.1), row 21, column CRT. Use-specific standards: Sec. 3.3.1.C.
AllowedTownhouse Living Permitted by right. Use Table, Sec. 3.1.6 (Chapter 59, Div 3.1), row 22, column CRT. Use-specific standards: Sec. 3.3.1.D.
AllowedMulti-Unit Living Permitted by right. Use Table, Sec. 3.1.6 (Chapter 59, Div 3.1), row 23, column CRT. Use-specific standards: Sec. 3.3.1.E.
Not AllowedAttached Accessory Dwelling Unit This use is not listed for this zone in the Use Table. Section 3.1.1.D: "A blank cell indicates that a use is prohibited in that zone". Use Table, Sec. 3.1.6 (Chapter 59, Div 3.1), row 34, column CRT. Use-specific standards: Sec. 3.3.3.B.
ConditionalHome Occupation (No Impact) Varies -- Limited under some conditions and Conditional under others. This pairing is not in the Section 3.1.1 key; the use's own standards decide which applies, so it is served as the stricter of the two. Use Table, Sec. 3.1.6 (Chapter 59, Div 3.1), row 40, column CRT. Use-specific standards: Sec. 3.3.3.H.
AllowedShort-Term Residential Rental Permitted by right, subject to the limited use standards in Div 3.2-3.7. Section 3.1.1.B: an "L" indicates that the use is permitted if it meets the limited use standards -- there is no hearing. Use Table, Sec. 3.1.6 (Chapter 59, Div 3.1), row 44, column CRT. Use-specific standards: Sec. 3.3.3.I.
AllowedFamily Day Care (Up to 12 Persons) Permitted by right. Use Table, Sec. 3.1.6 (Chapter 59, Div 3.1), row 49, column CRT. Use-specific standards: Sec. 3.4.4.C.
AllowedPrivate Club, Service Organization Permitted by right. Use Table, Sec. 3.1.6 (Chapter 59, Div 3.1), row 55, column CRT. Use-specific standards: Sec. 3.4.8.
AllowedPublic Use (Except Utilities) Permitted by right. Use Table, Sec. 3.1.6 (Chapter 59, Div 3.1), row 56, column CRT. Use-specific standards: Sec. 3.4.9.
AllowedReligious Assembly Permitted by right. Use Table, Sec. 3.1.6 (Chapter 59, Div 3.1), row 57, column CRT. Use-specific standards: Sec. 3.4.10.
AllowedCultural Institution Permitted by right. Use Table, Sec. 3.1.6 (Chapter 59, Div 3.1), row 47, column CRT. Use-specific standards: Sec. 3.4.3.
AllowedCharitable, Philanthropic Institution Permitted by right. Use Table, Sec. 3.1.6 (Chapter 59, Div 3.1), row 46, column CRT. Use-specific standards: Sec. 3.4.2.
AllowedBed and Breakfast Permitted by right, subject to the limited use standards in Div 3.2-3.7. Section 3.1.1.B: an "L" indicates that the use is permitted if it meets the limited use standards -- there is no hearing. Use Table, Sec. 3.1.6 (Chapter 59, Div 3.1), row 75, column CRT. Use-specific standards: Sec. 3.5.6.B.
AllowedHotel, Motel Permitted by right. Use Table, Sec. 3.1.6 (Chapter 59, Div 3.1), row 76, column CRT. Use-specific standards: Sec. 3.5.6.
AllowedRestaurant Permitted by right. Use Table, Sec. 3.1.6 (Chapter 59, Div 3.1), row 68, column CRT. Use-specific standards: Sec. 3.5.3.B.
AllowedConference Center Permitted by right. Use Table, Sec. 3.1.6 (Chapter 59, Div 3.1), row 94, column CRT. Use-specific standards: Sec. 3.5.10.C.
ConditionalRecreation and Entertainment Facility, Indoor (Capacity up to 1,000 Persons) Varies -- Limited under some conditions and Conditional under others. This pairing is not in the Section 3.1.1 key; the use's own standards decide which applies, so it is served as the stricter of the two. Use Table, Sec. 3.1.6 (Chapter 59, Div 3.1), row 97, column CRT. Use-specific standards: Sec. 3.5.10.F.
AllowedOffice Permitted by right. Use Table, Sec. 3.1.6 (Chapter 59, Div 3.1), row 84, column CRT. Use-specific standards: Sec. 3.5.8.B.
Not AllowedLife Sciences This use is not listed for this zone in the Use Table. Section 3.1.1.D: "A blank cell indicates that a use is prohibited in that zone". Use Table, Sec. 3.1.6 (Chapter 59, Div 3.1), row 83, column CRT. Use-specific standards: Sec. 3.5.8.A.
AllowedResearch and Development Permitted by right. Use Table, Sec. 3.1.6 (Chapter 59, Div 3.1), row 85, column CRT. Use-specific standards: Sec. 3.5.8.C.
AllowedRetail/Service Establishment (Up to 5,000 SF) Permitted by right. Use Table, Sec. 3.1.6 (Chapter 59, Div 3.1), row 104, column CRT. Use-specific standards: Sec. 3.5.11.B.
AllowedRetail/Service Establishment (15,001 - 50,000 SF) Permitted by right. Use Table, Sec. 3.1.6 (Chapter 59, Div 3.1), row 106, column CRT. Use-specific standards: Sec. 3.5.11.B.
ConditionalFilling Station Allowed only as a conditional use: it must meet the conditional use standards in Div 3.2-3.7 and requires approval by the Hearing Examiner (Sec. 3.1.1.C). Use Table, Sec. 3.1.6 (Chapter 59, Div 3.1), row 119, column CRT. Use-specific standards: Sec. 3.5.13.C.
Not AllowedFarming This use is not listed for this zone in the Use Table. Section 3.1.1.D: "A blank cell indicates that a use is prohibited in that zone". Use Table, Sec. 3.1.6 (Chapter 59, Div 3.1), row 6, column CRT. Use-specific standards: Sec. 3.2.6.
Not AllowedEquestrian Facility This use is not listed for this zone in the Use Table. Section 3.1.1.D: "A blank cell indicates that a use is prohibited in that zone". Use Table, Sec. 3.1.6 (Chapter 59, Div 3.1), row 4, column CRT. Use-specific standards: Sec. 3.2.4.
AllowedFarm Market, On-site Permitted by right, subject to the limited use standards in Div 3.2-3.7. Section 3.1.1.B: an "L" indicates that the use is permitted if it meets the limited use standards -- there is no hearing. Use Table, Sec. 3.1.6 (Chapter 59, Div 3.1), row 15, column CRT. Use-specific standards: Sec. 3.2.10.C.
AllowedLight Manufacturing and Production Permitted by right, subject to the limited use standards in Div 3.2-3.7. Section 3.1.1.B: an "L" indicates that the use is permitted if it meets the limited use standards -- there is no hearing. Use Table, Sec. 3.1.6 (Chapter 59, Div 3.1), row 144, column CRT. Use-specific standards: Sec. 3.6.4.C.
Not AllowedHeavy Manufacturing and Production This use is not listed for this zone in the Use Table. Section 3.1.1.D: "A blank cell indicates that a use is prohibited in that zone". Use Table, Sec. 3.1.6 (Chapter 59, Div 3.1), row 143, column CRT. Use-specific standards: Sec. 3.6.4.B.
AllowedStorage Facility Permitted by right, subject to the limited use standards in Div 3.2-3.7. Section 3.1.1.B: an "L" indicates that the use is permitted if it meets the limited use standards -- there is no hearing. Use Table, Sec. 3.1.6 (Chapter 59, Div 3.1), row 163, column CRT. Use-specific standards: Sec. 3.6.8.E.
Not AllowedFreight Movement This use is not listed for this zone in the Use Table. Section 3.1.1.D: "A blank cell indicates that a use is prohibited in that zone". Use Table, Sec. 3.1.6 (Chapter 59, Div 3.1), row 159, column CRT. Use-specific standards: Sec. 3.6.8.A.
AllowedPublic Utility Structure Permitted by right, subject to the limited use standards in Div 3.2-3.7. Section 3.1.1.B: an "L" indicates that the use is permitted if it meets the limited use standards -- there is no hearing. Use Table, Sec. 3.1.6 (Chapter 59, Div 3.1), row 157, column CRT. Use-specific standards: Sec. 3.6.7.E.
"Conditional" means the use generally requires a public hearing or special-exception approval — a very different timeline and risk profile from a by-right permit.
This is the zone. What about the parcel?
Zone rules are the starting point — the answer for a specific property also depends on lot
size, overlays, existing improvements and site conditions. Run a free address lookup to see
what applies to one property.
Standards as recorded by Zonescore: Chapter 59 Div 4.5
Coverage note: our ordinance review for this jurisdiction is still in progress. Treat the values above as a starting point and confirm against the ordinance before relying on them.