Largo, FL ADU Rules & Requirements
Planning an accessory dwelling unit in Largo? The city's ADU rules establish requirements for unit size, owner occupancy, setbacks, and eligible land-use classifications. Understanding these requirements can help you determine whether an ADU may work on your property.
How Large Can Your Largo ADU Be?
Largo does not use a simple 800-square-foot maximum for every property. The permitted size is based on the size of the principal dwelling.
The Rule
Your ADU can Be:
800
SQ FT
Maximum
If the 50% calculation would result in less than 400 square feet, the ADU may be permitted at a minimum of:
Minimun Size
400
SQ FT
SOURCE
City of Largo, Comprehensive Development Code §16.14
View official code →
Wichever is Less
OR
50%
Of the principal Dwelling's Habitable Area
Does Largo Require a Minimum Lot Size for an ADU?
Navigating spatial requirements is a critical first step in Accessory Dwelling Unit development. Understanding how the City of Largo structures its lot size regulations ensures your project starts on a solid foundation.
Good news for prospective developers: Largo's ADU regulations do not establish a separate minimum lot-size requirement specifically for an ADU. The presence of an existing primary residence on a compliant lot is the primary spatial threshold.
The Core Regulation
Important Caveat
While there is no ADU-specific minimum lot size, lot size is not irrelevant.
Other fundamental land-use and general development requirements (such as setbacks, impervious surface limits, and parking) may still practically restrict or affect your eligibility based on the actual physical space available on your parcel.
Source: Refer to the City of Largo Comprehensive Development Code §16.14 for full statutory language regarding structural allowances.
The FLUM Factor
Unlike many jurisdictions, the City of Largo utilizes a Future Land Use Map (FLUM) rather than a traditional zoning map system to govern development. This means that your property's eligibility for an ADU and the specific dimensional standards applied to it depends heavily on its specific FLUM classification.
Where Can a Largo ADU Be Located?
Largo does not establish one citywide ADU setback number. Instead, the ADU follows the applicable side and rear setbacks for the principal use.
ADUs are not permitted in the front yard.
SETBACKS FOLLOW THE PRINCIPAL USE
The ADU follows the applicable side and rear setbacks for the principal use.
YOUR BUILDABLE AREA DEPENDS ON YOUR PROPERTY
Because the applicable setbacks depend on the principal use and land-use classification, the exact buildable area should be confirmed for the individual property before designing the ADU.
Frequently Asked Questions
Largo uses Future Land Use Map classifications as part of its land-use framework. ADU eligibility is based on the applicable land-use classification and the development regulations that apply to the property.
The ADU can be up to 800 square feet or 50% of the principal dwelling's habitable area, whichever is less. If the 50% calculation is below 400 square feet, the minimum permitted ADU size is 400 square feet.
No. The owner can occupy either the principal dwelling or the ADU. Largo requires the owner to occupy one of the two and provide a notarized affidavit confirming the required occupancy.
Thinking About an ADU in Largo?
Before you choose a floor plan, confirm your property's land-use classification, calculate the permitted ADU size, and determine how the unit can fit within the applicable site requirements.