HOUSE OF REPRESENTATIVES STAFF ANALYSIS
BILL #: CS/HB 557 Movable Tiny Homes
SPONSOR(S): Regulatory Reform & Economic Development Subcommittee, Stevenson
TIED BILLS: IDEN./SIM. BILLS:
REFERENCE ACTION ANALYST STAFF DIRECTOR or
BUDGET/POLICY CHIEF
1) Regulatory Reform & Economic Development 15 Y, 0 N, As CS Wright Anstead
Subcommittee
2) Transportation & Modals Subcommittee 14 Y, 0 N Hinshelwood Hinshelwood
3) Commerce Committee
SUMMARY ANALYSIS
Under Florida law, a tiny house affixed to a permanent foundation must meet Florida Building Code standards
applicable to tiny houses. A “tiny house”, as defined in the Florida Building Code, is a dwelling that is 400
square feet or less in floor area excluding lofts and must be built to the tiny house standards in the Florida
Building Code.
In some instances, current law allows a movable tiny home built on a chassis or flatbed trailer to be registered
as a “park trailer” under the purview of the Department of Highway Safety and Motor Vehicles. However, such
movable tiny home is limited to seasonal use.
A “trailer” means any vehicle without motive power designed to be coupled to or drawn by a motor vehicle and
constructed so that no part of its weight or that of its load rests upon the towing vehicle. There is no seasonal
time limitation for the use of trailers.
The bill would allow a movable tiny home, when built in accordance with the Florida Building Code, to be
utilized for year-round living.
The bill includes “movable tiny home” in the definition of “trailer.”
Under the bill, a "movable tiny home" means a trailer:
 That is transportable unit with a house affixed to a single chassis;
 Designed to provide permanent living quarters for no more than one household;
 With a body width not exceeding 14 feet;
 With a total area in set up mode that does not exceed 500 square feet;
 Connected to utilities necessary for operation of installed fixtures and appliances;
 Constructed and inspected in accordance with the Building Code; and
 With a sticker or other documentation certifying that it was inspected and certified for compliance with
the Building Code by a licensed professional engineer, architect, or third-party inspector for compliance
with the Building Code.
The bill also requires the Building Commission to review any updates to such codes which pertain to
requirements for movable tiny homes.
The bill does not appear to have a fiscal impact on state or local governments.
The bill has an effective date of October 1, 2024.
This docum ent does not reflect the intent or official position of the bill sponsor or House of Representatives .
STORAGE NAME: h0557c.TMS
DATE: 1/31/2024
 FULL ANALYSIS
I. SUBSTANTIVE ANALYSIS
A. EFFECT OF PROPOSED CHANGES:
Current Situation
Tiny Houses v. Movable Tiny Homes
Under current Florida law, a tiny house affixed to a permanent foundation must meet Florida Building
Code standards applicable to tiny houses.1 In some instances, current law allows a movable tiny home
built on a chassis or flatbed trailer to be registered as a “park trailer” under the purview of the
Department of Highway Safety and Motor Vehicles (DHSMV). 2 However, such movable tiny home is
limited to seasonal use.
Park Trailers
Chapter 320, F.S., defines “park trailer” as a type of recreational vehicle that is transportable with a
body width not exceeding 14 feet, which is built on a single chassis and is designed to provide
seasonal or temporary living quarters when connected to utilities necessary for operation of installed
fixtures and appliances.3 The total area of the unit in a setup mode, when measured from the exterior
surface of the exterior stud walls at the level of maximum dimensions, not including any bay window,
does not exceed 400 square feet when constructed to American National Standards Institute (ANSI)4
A-119.5 standards, and 500 square feet when constructed to United States Department of Housing and
Urban Development (HUD) Standards.5
The DHSMV has adopted rules setting forth uniform standards for the installation of a mobile home,
manufactured home, or park trailer that is being used as a dwelling place and that is located on a
particular location for a period of time exceeding 14 days, for a mobile or manufactured home, or 45
days, for a park trailer.6 The rules must ensure that the home or park trailer is installed on a permanent
foundation that resists wind, flood, flotation, overturning, sliding, and lateral movement of the home or
park trailer.7 Such rules are in Ch. 15C-1, F.A.C., and include requirements for anchors and tie-downs.8
A county or municipality is responsible for the onsite inspection of each park trailer installation located
within its jurisdiction in order to ensure compliance with the DHSMV’s uniform installation standards.9
As stated above, the definition of “park trailer” contemplates that it is used as “seasonal or temporary
living quarters.” Some people live in movable tiny homes year-round but must periodically leave RV
and mobile home parks because of the seasonal/temporary nature of their registration as a “park
trailer.”
1
FBC, Residential, Appendix Q (8th Ed. 2023), https://up.codes/viewer/florida/fl-residential-code-2020/chapter/Q/tiny-houses#AQ102
(last visited Jan. 29, 2024).
2 S. 320.01(1)(b)7., F.S.
3 Id.
4 The American National Standards Institute (ANSI) is a private, non -profit organization that administers and coordinates the U.S.
voluntary standards and conformity assessment system. The Institute works in close collaboration with stakeholders from indus try and
government to identify and develop standards - and conformance-based solutions to national and global priorities. American National
Standards Institute, Introduction, https://www.ansi.org/about/introduction (last visited Jan. 29, 2024).
5 S. 320.01(1)(b)7., F.S.
6 S. 320.8325(1)&(5), F.S.
7 Id.
8 Ch. 15C-1, F.A.C., availab le at https://www.flrules.org/gateway/ChapterHome.asp?Chapter=15c-1.
9 S. 320.8285(1)&(7), F.S.
STORAGE NAME: h0557c.TMS PAGE: 2
DATE: 1/31/2024
 Trailers
Chapter 320, F.S., defines “trailer” to mean any vehicle without motive power designed to be coupled to
or drawn by a motor vehicle and constructed so that no part of its weight or that of its load rests upon
the towing vehicle.10
Building Standards for Tiny Homes
Florida Building Code Provisions Related to Tiny Houses
The 2020 Edition of the Florida Building Code (Building Code) incorporated Appendix Q to outline tiny
house standards statewide,11 which defines “tiny house” as a permanent residential dwelling that is 400
square feet or less in floor area excluding lofts and must be built to the tiny house standards in the
Florida Building Code.12 As a tiny house is a type of residential dwelling, it must be on and permanently
affixed to a foundation and comply with building requirements for the superstructure. 13
Florida Building Code
Since 2000, Florida has operated under a uniform statewide building code. Prior to that, different
counties had different building codes.
In 1974, Florida adopted legislation requiring all local governments to adopt and enforce a minimum
building code that would ensure that Florida’s minimum standards were met. Local governments could
choose from four separate model codes. The state’s role was limited to adopting all or relevant parts of
new editions of the four model codes. Local governments could amend and enforce their local codes,
as they desired.14
In 1992, Hurricane Andrew demonstrated that Florida’s system of local codes did not work. Hurricane
Andrew easily destroyed those structures that were allegedly built according to the strongest code. The
Governor eventually appointed a study commission to review the system of local codes and make
recommendations for modernizing the system. The 1998 Legislature adopted the study’s commission
recommendations for a single state building code and enhanced the oversight role of the state over
local code enforcement. The 2000 Legislature authorized implementation of the Building Code, and that
first edition replaced all local codes on March 1, 2002. 15 The current edition of the Building Code is the
eighth edition, which is referred to as the 2023 Florida Building Code.16
Chapter 553, part IV, F.S., is known as the “Florida Building Codes Act” (Act). The purpose and intent
of the Act is to provide a mechanism for the uniform adoption, updating, interpretation, and
enforcement of a single, unified state building code. The Building Code must be applied, administered,
and enforced uniformly and consistently from jurisdiction to jurisdiction. 17
The Florida Building Commission (Commission) was statutorily created to implement the Building
Code. The Commission, which is housed within the Department of Business and Professional
Regulation (DBPR), is a 19-member technical body made up of design professionals, contractors, and
government experts in various disciplines covered by the Building Code. The Com mission reviews
several International Codes published by the International Code Council, 18 the National Electric Code,
10 S. 320.01(4), F.S.
11 FBC, Residential, Appendix Q (8th Ed. 2023).
12 S. AQ101.1, FBC, Residential (8th Ed. 2023).
13 S. R401.1, FBC, Residential (8th Ed. 2023).
14 The Florida Building Commission Report to the 2006 Legislature, Florida Department of Community Affairs, p. 4,
http://www.floridabuilding.org/fbc/publications/2006_Legislature_Rpt_rev2.pdf (last visited Jan. 29, 2024).
15 Id.
16 Florida Building Commission Homepage, https://floridabuilding.org/c/default.aspx (last visited Jan. 29, 2024).
17 See s. 553.72(1), F.S.
18 The International Code Council (ICC) is an association that develops model codes and standards used in the design, building, and
compliance process to “construct safe, sustainable, affordable and resilient structures.” International Code Counci l, Ab out the ICC,
https://www.iccsafe.org/about/who-we-are/ (last visited Jan. 29, 2024).
STORAGE NAME: h0557c.TMS PAGE: 3
DATE: 1/31/2024
 and other nationally adopted model codes to determine if the Building Code needs to be updated and
adopts an updated Building Code every three years. 19
Building Permits
It is the intent of the Legislature that local governments have the power to inspect all buildings,
structures, and facilities within their jurisdiction in protection of the public’s health, safety, and welfare. 20
Every local government must enforce the Building Code and issue building permits.21 A building permit
is an official document or certificate issued by the local building official that authorizes performance of a
specific activity.22 Any construction work that requires a building permit also requires the review of
building plans and inspections of the progress of work completed by the building official, inspector, or
plans examiner to ensure the work complies with the Building Code.23
It is unlawful for a person, firm, or corporation to construct, erect, alter, repair, secure, or demolish any
building without first obtaining a building permit from the local government or from such persons as
may, by resolution or regulation, be directed to issue such permit, upon the payment of reasonable fees
as set forth in a schedule of fees adopted by the enforcing agency.24
To obtain a permit, an applicant must complete an application for the proposed work on the form
furnished by the local enforcing agency.25 A local enforcing agency may not issue a permit until the
building official or plans reviewer has reviewed the building plans and determined that they comply with
the Building Code.26 A certificate of completion for a building or structure may be issued when such
work passes its final building inspection.27
Substructure and Superstructure
The part of the structure that is buried underground is referred to as the substructure, and includes the
foundation. The building’s weight is dispersed throughout the substructure and the ground underneath
it.28 A building’s foundation serves to transmit loads from the superstructure to the ground underneath.
The Building Code requires foundations to be capable of resisting all loads from roof uplift and building
overturn.29
The superstructure is the whole part of a structure that is above ground or above the foundation.
Beams, columns, finishes, windows, doors, the roof, and floors, are considered to be part of the
superstructure.30
Tie-Downs
In general, tie-downs are systems of heavy-duty straps and ground anchors that stabilize manufactured
homes or trailers during high winds. Failure to properly install and maintain tie-downs results in reduced
capacity to resist sliding and overturning.31
19 S. 553.73(7)(a), F.S.
20
S. 553.72, F.S.
21 Ss. 125.01(1)(bb), 125.56(1), and 553.80(1), F.S.
22 S. 468.603(2), F.S; S. 202, FBC, Building (8th Ed. 2023).
23 Ss. 107, 110.1, and 110.3, FBC, Building (8th Ed. 2023).
24 See ss. 125.56(4)(a) and 553.79(1), F.S.
25
Ss. 125.56(4)(b), 553.79(1), and 713.135(5) and (6), F.S.
26 S. 553.79(2), F.S.
27 Passage of a final building inspection includes obtaining approvals for all permits issued for the project (such as building and fire
permits and sub-permits such as electrical, mechanical, elevator, plumbing, and roof permits). S. 553.79(17)(a), F.S.; S. 110, Fla. Bldg.
Code, 7th Ed. (2020).
28 Civil Engineering Forum, WHAT IS SUPERSTRUCTURE AND SUBSTRUCTURE?, Nov. 20, 2022,
https://www.civilengineeringforum.me/superstructure-and-substructure/ (last visited Jan. 29, 2024).
29 S. R401.2, FBC, Residential (8th Ed. 2023).
30 Civil Engineering Forum, supra note 33.
31 Nick Gromicko and Kenton Shepard, Tie-Downs for Manufactured Homes, International Association of Certified Home Inspectors,
https://www.nachi.org/manufactured-home-tie-
downs.htm#:~:text=Tie%2Ddowns%20are%20systems%20of,to%20resist%20sliding%20and%20overturning. (last visited Jan. 29,
2024).
STORAGE NAME: h0557c.TMS PAGE: 4
DATE: 1/31/2024
 Effect of the Bill
The bill allows a movable tiny home, when built in accordance with the Florida Building Code, to be
utilized for year-round living.
The bill amends s. 320.01(4), F.S., to include “movable tiny home” in the definition of “trailer;” and
creates s. 320.8201, F.S., to provide standards for movable tiny homes.
Under the bill, a "movable tiny home" means a trailer:
 That is transportable unit with a house affixed to a single chassis;
 Designed to provide permanent living quarters for no more than one household;
 With a body width not exceeding 14 feet;32
 With a total area in set up mode that does not exceed 500 square feet;33
 Connected to utilities necessary for operation of installed fixtures and appliances;
 Constructed and inspected in accordance with the Building Code; and
 With a sticker or other documentation certifying that it was inspected and certified for
compliance with the Building Code by a licensed professional engineer, architect, or third-party
inspector for compliance with the Building Code.
The bill also requires the Building Commission to review any updates to such codes which pertain to
requirements for movable tiny homes.
The bill has an effective date of October 1, 2024.
B. SECTION DIRECTORY:
Section 1: Amends s. 320.01, F.S., relating to definitions, general.
Section 2: Creating s. 320.8201, F.S., relating to movable tiny home standards.
Section 3: Amends s. 553.73, F.S., relating to Florida Building Code.
Section 4: Provides an effective date of October 1, 2024.
II. FISCAL ANALYSIS & ECONOMIC IMPACT STATEMENT
A. FISCAL IMPACT ON STATE GOVERNMENT:
1. Revenues:
None.
2. Expenditures:
None.
B. FISCAL IMPACT ON LOCAL GOVERNMENTS:
1. Revenues:
None.
2. Expenditures:
None.
32 Under the bill, the length of a movable tiny home means the distance from the exterior of the front of the body (nearest
to the drawbar and coupling mechanism) to the exterior of the rear of the body (at the opposite end of the body), including
any protrusions.
33 Under the bill, total area means when the unit is when measured from the exterior surface of the exterior stud walls at
the level of maximum dimensions, not including any bay window.
STORAGE NAME: h0557c.TMS PAGE: 5
DATE: 1/31/2024
 C. DIRECT ECONOMIC IMPACT ON PRIVATE SECTOR:
Individuals who live in a movable tiny home may be able to live in one location for as long as they
choose.
D. F