Subdivision Mapping, SB9 Lot Splits, Parcel & Tract Maps

What  Subdivision Mapping Covers

Subdivision  is the legal process of dividing one or more parcels into multiple new  parcels, governed by the California Subdivision Map Act and local ordinances.  Common subdivision types include parcel maps (typically 4 parcels or fewer),  tract maps (5 or more parcels), and, since 2022, SB9 urban lot splits that  allow eligible single-family residential parcels in qualifying zones to be  split into two. Each subdivision type has specific surveying, mapping, and  processing requirements. We provide the boundary surveying, tentative and  final map preparation, agency coordination, and recording support required  for residential and small commercial subdivisions across LA and Ventura  County jurisdictions.

Common  Reasons Clients Request Subdivision Mapping

• SB9 urban  lot split of an eligible single-family parcel into two parcels

• Parcel map subdivision of a larger parcel into 2 to 4 new  parcels

• Tract map subdivision creating 5 or more new parcels

• Commercial development requiring parcel reconfiguration

• Estate or family planning involving creation of new parcels

• Public works projects involving right-of-way creation or  adjustment

• Long-term development plans requiring tentative map approval  before final map filing

• Conversion of existing improvements (apartment to  condominium) involving subdivision

What’s  Included in Subdivision Mapping

• Boundary  survey of the parcel(s) to be subdivided

• Records research, title coordination, and easement plotting

• Tentative map preparation showing the proposed subdivision  design

• Agency coordination during the tentative map approval  process

• Final map preparation per the approved tentative map

• Coordination with planning, public works, and recorder's  office on map review

• Boundary monument setting at the new parcel corners

• Final map recording with the county recorder

Common  Subdivision Mapping Add-Ons

• Topographic  survey of the parcel for site planning and grading design

• Title company coordination for easement and lien analysis

• Engineering coordination for civil improvements (utilities,  streets, drainage)

• Legal description preparation for the resulting parcels

• Construction staking after improvements are designed

• Final map closing and reciprocal easement coordination

What We Need to Start Your Subdivision Mapping

• Property  address and APN

• Subdivision type and intent (SB9, parcel map, tract map)

• Title report for the parcel(s)

• Property owner information and authorization

• Civil engineer or design team contact (when improvements are  part of scope)

• Agency pre-application discussions or feedback received

• Timeline driven by development schedule or financing

• Any prior surveys, plans, or recorded subdivision references

Our Subdivision Mapping Process

1.  Pre-application. We confirm subdivision type, agency requirements, and  feasibility.

2. Boundary survey. We perform boundary survey of the  parcel(s) to be subdivided.

3. Tentative map. We prepare the tentative map and coordinate  the application package.

4. Tentative map approval. We respond to agency review and  condition compliance during the approval process.

5. Final map. After tentative map approval, we prepare the  final map per the conditions and improvements.

6. Recording. We coordinate final map review, signature, and  recording with the county recorder.

Subdivision Mapping Deliverables

• Tentative  map (PDF and CAD) per the agency's submittal requirements

• Final map (PDF and recorded original) meeting county  recording standards

• Boundary monumentation at the new parcel corners

• Legal descriptions of the resulting parcels

• Application packages and condition compliance documentation

• Coordination correspondence with planning, public works, and  recorder's office

Why Builoff for Your Subdivision Mapping

• Licensed  California PLS (PLS 8099) overseeing all subdivision work

• Experience with SB9 urban lot splits since the law took  effect in 2022

• Familiar with subdivision processes across LA City, LA  County, and Ventura County jurisdictions

• Coordination experience with planning staff, public works  engineers, and recorder's office

• Combined boundary + tentative + final map scope under one  PLS keeps costs efficient and the project consistent

• Realistic timelines and processing expectations,  subdivisions take time, and we set clear expectations upfront