Engineering Services we offer

Civil Engineering That Keeps Your Project Moving.

Crowther Engineering handles the site side of your project — grading, drainage, access, utilities, and site planning — so we identify site constraints early, when they are still easier and less expensive to address.

We work with builders, homeowners, architects, contractors, and developers across Arizona, Southern Utah, Nevada, and Texas. Whether it is a single-lot grading and drainage plan, a small subdivision, or a larger land-development project, clients work directly with a licensed civil engineer from early feasibility through permit-level design.

Civil Engineering Grading and Drainage Plans.

Single-Lot Grading & Drainage Plans in Utah, Arizona & Mesquite, Nevada

Custom home, hillside, steep-lot, and difficult-site G&D plans for builders, architects, developers, and homeowners.

Crowther Engineering, LLC provides single-lot grading and drainage plans for custom homes, hillside lots, infill parcels, and difficult residential sites throughout Utah, Yavapai County, Arizona, and Mesquite, Nevada. We help coordinate finished floor elevations, driveway grades, drainage paths, site balance, retention/detention where required, and jurisdiction-ready civil plan sets.

  • Design kickoff — site goals, architect intent, grade & drainage strategy captured upfront

  • Residential & steep-lot grading

  • Storm flow & site drainage design

  • Site balance & cut/fill optimization

  • Constructability & cost considered

  • Jurisdiction-ready plan sets

Civil Engineering Master Planned Communities Arizona, Utah, Southern Utah, St. George, Cedar, Land Development

Land Development & Subdivision Design 

Civil Input That Protects Lot Yield, Infrastructure Cost, and Schedule.

We work with developers and builder-developers from early layout through permit submittal — providing the civil foundation that keeps lot yield up, costs predictable, and entitlement moving. The earlier we’re involved, the more options we can preserve.

Roadway Design

  • Layout, alignment & vertical profile

  • Cul-de-sac, intersection & sight distance

  • Pavement section & curb/gutter drainage

  • Right-of-way & street connectivity

Utility Layout & Design
(Water, Sewer, Stormwater & Dry Utilities)

  • Pipeline crossings & conflict resolution

  • Roadway & utility crossing design

  • Utility phasing & sequencing

  • Service lateral layout

  • Fire hydrant placement & water system design

  • Lift station coordination

  • Utility easement coordination

  • Off-site utility extensions & tie-ins

Site & Infrastructure

  • Earthwork & mass grading plans

  • Grading, drainage & retention

  • Phased development planning

  • Erosion & sediment control (SWPPP)

Entitlement & Permits

  • Entitlement exhibits

  • Construction-ready civil plans

Arizona Civil Engineering Single Family Lot Grading and Drainage Plans Sedona

Feasibility, Lot Splits, & Due Diligence

Know What Your Land Can Do Before You Commit

Every property has constraints that affect value, layout, and development cost. Drainage requirements, utility availability, access, off-site improvements, street layout, and infrastructure crossings can all change what a site can realistically support.

Our feasibility and due diligence work gives you a clearer picture before you commit significant time or money — including lot yield, drainage requirements, utility constraints, access limitations, and potential off-site improvements.

  • Pre-purchase & due diligence civil review

  • Site feasibility & buildability analysis

  • Lot yield & constraint assessment

  • Retention & stormwater sizing concepts

  • Utility constraint & lift station identification

  • Pipeline & infrastructure crossing review

  • Off-site improvement assessment

  • Lot split & parcel planning

  • Preliminary layout & grading concepts

  • Construction-ready civil plans

Commerical Site work Civil Engineer Arizona utah Nevada Texas

Commercial & Site Development

A Civil Engineer Who Keeps Pace With Your Project.

We provide civil and site engineering for commercial contractors, architects, and developers who need a responsive civil team that handles the site scope and stays out of the way of the schedule.

  • Small commercial buildings

  • Office & retail sites

  • Restaurants & contractor yards

  • Industrial/flex & storage sites

  • RV parks & manufactured home parks

  • Grading, drainage, retention, & detention

  • Parking lot layout & design

  • Access, circulation & utility coordination

  • Site planning & feasibility input

  • Construction-ready civil plans

Markets We Serve

Crowther Engineering provides civil and site engineering services across Arizona, Utah, and Nevada, with active experience in Mohave, Yavapai, and Coconino Counties, St. George and Southern Utah, and Mesquite, Nevada.

We are licensed in Arizona, Utah, Texas, and Nevada and are available for select projects outside our primary service areas.

Work With Us