COMMUNITY DEVELOPMENT AND PLANNING

LEWIS AND CLARK COUNTY SUBDIVISION REGULATIONS

Community Development and Planning Contact Information

Department Phone: (406) 447-8374  
Department Email: Email
Location: Room 230, City/County Building

Mailing Address:
Lewis and Clark County
Community Development and Planning Department
316 N. Park Ave., Helena, MT 59623

Hours: 8:00 a.m.- 5:00 p.m.
Monday-Friday


Entire copy of the Subdivision Regulations (effective March 5, 2009) can be downloaded:(PDF)
Individual chapters and appendices can be downloaded below.

The current Subdivision Regulations (effective December 13, 2016) can be accessed here.

You need
Adobe Acrobat Reader to view and print .pdf files. You can download it here.

TITLE PAGE (pdf)
TABLE OF CONTENTS (pdf)
CHAPTER I.      GENERAL PROVISIONS…I-I (pdf)
CHAPTER II.   ADMINISTRATIVE PROVISIONS…II-I  (pdf)
CHAPTER III.    
PROCEDURES FOR MAJOR SUBDIVISIONS…III-I
(pdf)
CHAPTER IV.  PROCEDURES FOR MINOR SUBDIVISIONS…IV-I (pdf)
CHAPTER V.     CORRECTING OR AMENDING FILED FINAL PLATS…V-I (pdf)
CHAPTER VI.    PROCEDURES FOR SUBDIVISIONS CREATED BY RENT, 
                               LEASE, OR OTHER CONVEYANCE…VI-I
(pdf)
CHAPTER VII.   GENERAL STANDARDS FOR MOBILE HOME PARKS…VII 
(pdf)
CHAPTER VIII.  GENERAL STANDARDS FOR RECREATIONAL
                               VEHICLE PARKS…VIII-I
(pdf)
CHAPTER IX.     PLANNED UNIT AND CLUSTER DEVELOPMENTS…IX-I (pdf)
CHAPTER X.     CONDOMINIUMS AND TOWNHOUSES…X-I  (pdf)
CHAPTER XI.  GENERAL DESIGN AND IMPROVEMENT STANDARDS…XI-I (pdf)

APPENDICES
A.  Definitions (pdf)
B.  Subdivision Application Form, Contents, and Supplements (pdf)
C.  Part I: Information Required for Environmental Assessment   
              Under the Subdivision and Platting Act (C-1)
(pdf)
     Part II: Subdivision Checklist (C-2) (pdf)
D.  Standards for Final Subdivision Plats (pdf)
ESubdivision Improvement Guarantees (pdf)
F.  Standards and Requirements for Flood Hazard Evaluation (pdf)
G.  Lewis and Clark County Road Naming, Road Sign Identification, and  
               Installation Conventions
(pdf)
H.  Lewis and Clark County Addressing Conventions (pdf)
I.   Criteria for Review of Claimed Exemptions From Provisions of the
               Subdivision and Platting Act
(pdf)
J.   Lewis and Clark County Road Standards  (pdf)
               High resolution pdfs of the road cross sections found in Appendix J:
               (These files are large and depending on your connection, 
                will require time to open)
                            Typical Section No. 1
(.pdf)
                            Typical Section No. 2 (.pdf)
                            Typical Section No. 3 (.pdf)
                            Typical Section No. 4 (.pdf)
K.   Fire Protection Standards (pdf)
L.   Water Body Classifications (pdf)
M.  Lewis and Clark County Ex Parte Communication Policy (pdf)