Subdivision Design · Residential & Commercial

Subdivision Design

Engineering and surveying to divide a parcel into legally recorded lots — from preliminary layout through final plat recording with the County Clerk.

Civil Engineering Land Surveying

Why It Matters

Subdivision Is More
Than Drawing
Lot Lines.

A subdivision plat is a recorded legal document. Once filed with the County Clerk, it defines property ownership for decades — every lot boundary, easement, right-of-way, and restriction is permanent public record. There is no such thing as an approximate subdivision plat.

Getting there requires coordinated civil engineering and land surveying: boundary work to establish the existing parcel, design work to lay out the new lots and infrastructure, and a structured approval process through town, county, and state agencies. MLA handles both disciplines under one roof — no hand-offs between firms, no gaps in the record.

01

A Recorded Legal Document

The final subdivision plat is filed with the County Clerk and becomes the official record of every lot, easement, and right-of-way. It cannot be loosely drawn or approximately dimensioned — every line and number is a legal statement.

02

Infrastructure Is Part of the Package

Most municipalities require road plans, drainage design, and utility extensions before approving a subdivision. The lot layout alone is not enough — the infrastructure serving those lots must be engineered, too.

03

Multi-Agency Approval Required

Town Planning Board, Monroe County DOT, NYSDEC, and the Town Engineer all review a subdivision application. SEQR is required by state law. MLA manages every submission, deadline, and response.

The Process

From Parcel to Plat

Subdivision follows a structured approval pathway required by New York State Town Law. Here's how a parcel becomes legally divided lots — and what's required at each step.

Land Surveying

Civil Engineering

Boundary Survey

01

Boundary Survey & Base Map

Deliverable included

What We Do

Research existing deeds, historic maps, and County Clerk records for the parcel
Conduct full boundary survey and set property corners
Produce topographic survey capturing existing grades, structures, and features
Calculate parcel area, frontages, and verify deed descriptions

Deliverable

Certified boundary plat + topographic base map — the data foundation every subsequent design phase is built on. This step cannot be skipped or approximated.

Civil Engineering

02

Preliminary Plat Design

Deliverable included

What We Do

Develop proposed lot layout: lot lines, dimensions, areas, and numbering
Evaluate road geometry, lot access, and cul-de-sac or through-street requirements
Verify setback and minimum lot size compliance with local zoning
Identify required easements, open space parcels, and rights-of-way

Deliverable

Preliminary subdivision plat submitted to the Planning Board for concept review and feedback — confirms the layout is viable before full infrastructure engineering begins.

Civil Engineering

03

Infrastructure Engineering

Deliverable included

What We Do

Design road plans: plan and profile drawings, cross-sections, pavement design
Size and route stormwater management facilities: swales, detention, outlets
Design utility extensions: water main, sanitary sewer, hydrant locations
Prepare drainage calculations verifying pre/post-development runoff compliance

Deliverable

Full infrastructure drawing set with drainage calculations — what the Planning Board requires before granting final subdivision approval. No infrastructure design means no final approval.

Civil Engineering

04

SEQR & Agency Submissions

Deliverable included

What We Do

Prepare New York State Environmental Quality Review (SEQR) documentation
Submit NYSDEC SPDES General Permit for stormwater if disturbance exceeds 1 acre
Coordinate Monroe County DOT review for access onto county roads
Submit Health Department application if individual wells or septic are proposed

Deliverable

All required agency applications submitted and tracked — SEQR determination, SPDES permit, DOT permit, and Health Department approval as applicable. MLA manages every deadline and response.

Land Surveying

05

Final Plat & Recording

Deliverable included

What We Do

Draft final subdivision plat to precise survey measurements — exact lot dimensions, areas, easements, and bearings
Coordinate Planning Board review of final plat and obtain signatures of approval
Obtain all required signatures: Planning Board chair, surveyor, engineer, owner
File final plat with the County Clerk — the legal act that creates the new lots

Deliverable

Final subdivision plat recorded with the County Clerk — the permanent public record that defines every new lot, easement, and right-of-way. From this point, the lots exist as legal parcels.

The final plat recording is not the end of the project — it's the end of the approval process. MLA remains available for construction staking and as-built documentation as the new lots are developed.

Deliverables

What You Receive

A complete subdivision engagement produces the following documents — each one required to move through the approval process and ultimately record new legal lots.

Boundary Survey & Base Map

Certified survey plat (PLS-stamped) establishing the existing parcel, with topographic data as the design foundation.

Preliminary Plat Layout

Lot layout drawing for Planning Board review — confirms the subdivision concept before infrastructure engineering begins.

Road Plans, Profiles & Cross-Sections

Full road design drawing set showing geometry, grades, pavement design, and drainage inlets. Required before final approval.

Stormwater Management Plan & Calculations

Engineered drainage design and supporting calculations demonstrating compliance with NYSDEC and municipal requirements.

SEQR Documentation

Full environmental review documentation required by New York State law for most subdivision actions.

Final Subdivision Plat (County Clerk Recording-Ready)

The recorded legal document that creates the new lots — signed and sealed by the PLS, approved by all required parties, filed with the County Clerk.

Subdivision Work

Projects We've Delivered

Aldrich Glen Subdivision

Residential Subdivision

Aldrich Glen Subdivision

Perinton, NY — Monroe County

12-lot single-family residential subdivision — boundary survey through final plat recording, with subdivision layout, site engineering, stormwater, and wetlands permitting.

Subdivision Layout & Lot Design
Site Engineering & Grading
Stormwater Management
Wetlands Permitting
Municipal Planning Approvals

View Project →

Fourmile Creek PUD

Planned Unit Development

Fourmile Creek PUD

Ontario, NY — Wayne County

Mixed-use planned unit development combining residential and commercial components — PUD design, subdivision layout, infrastructure engineering, and full municipal approvals.

PUD Design
Subdivision Layout
Stormwater Management
Site Engineering
Municipal Approvals

View Project →

Lake Breeze Subdivision

Residential Subdivision

Lake Breeze Subdivision

Webster, NY — Monroe County

87-lot cluster subdivision — boundary survey, subdivision layout, site engineering, wetlands permitting, construction engineering, and as-built documentation.

Boundary Survey
Subdivision Layout
Site Engineering
Wetlands Permitting
Construction Engineering
As-Built

View Project →

View All Projects →

Related Services

Civil Engineering

Site plan drawing sets, grading, drainage, utilities, and agency submissions — the engineering layer on top of every subdivision design.

Land Surveying

Boundary surveys, topographic surveys, and final plat recording — the survey work that begins and ends every subdivision.

Site Development

Full-scope site development from first survey through construction clearance — for projects that require both subdivision and site plan approval.

Get Started

Ready to move
your project
forward?

Whether you're subdividing a family parcel or planning a full residential development, we'll tell you what the process requires and what the realistic timeline looks like. Let's talk.

Call Our Office

822 Holt Rd
Webster, NY