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Residential site engineering

High-quality site design for builders and architects

New homes, rebuilds, pools and outdoor amenities in Nashville, Belle Meade, Forest Hills and Oak Hill, and the surrounding communities from Franklin and Murfreesboro to Hendersonville, Mt. Juliet and Clarksville. Plans built for review, sealed by the engineer you talk to.

500+ projects completed · PE licensed in TN, KY & IL

High-end white brick single-family home on a wooded lot in the Hillwood area Aerial view of a Harpeth Civil townhome development along the Cumberland River with the Nashville skyline behind it Brick multi-family townhomes on Portland Avenue near Belmont University Rendering of a row of white brick townhomes High-end multi-family townhomes on Youngs Lane along the Cumberland River Aerial rendering of modern urban townhomes on Watts Lane in Charlotte Park Modern luxury custom home on a critical lot in Woodland Hills, Nolensville High-end luxury home rebuild on Trimble Road in the Belle Meade area Luxury custom home in Eleanor Village, Ashland City White brick luxury custom home on a critical lot in The Reserve at Raintree, Brentwood Custom urban townhomes on Lischey Avenue in East Nashville
Home buildersSpec and custom builders who need plans fast and predictable.
Architects & designersA civil partner who coordinates finished floors, driveways and drainage early.
Homeowners & lot buyersPlain answers on what Metro will require before you buy or build.

Residential services

What I design

Offering an exceptional level of engineering expertise and service to every project.

01

Residential site, grading & drainage plans

Site layout and drainage design for projects of all types and sizes. Permit-ready drawings to help keep your project moving forward.

02

Stormwater infill & management

Metro Regulated Residential Infill plans for Tier I, II and III projects: green infrastructure sizing, downstream drainage checks, and 10-year detention where required.

03

Infill & critical lot plans

Infill plans for teardown rebuilds and additions, and critical lot plans for steep or constrained lots, prepared for Metro Nashville review.

04

Pool & amenity plans

Site, grading and drainage plans for pools, pool houses, outdoor kitchens, sport courts and other backyard amenities, including the stormwater review the added impervious area can trigger.

05

Custom & high-end home sites

Hillside and acreage sites: driveway profiles, retaining walls, utility layout and erosion and sediment control (EPSC) plans.

06

Townhomes & small subdivisions

Site layout, drainage, and utility design for multi-family townhomes, HPRs, and residential subdivisions.

How it works

Plan to permit

Let's talk

Call or submit a quote request for a free consultation.

Get a fixed proposal

A clear scope and fee before any work starts.

Plan your vision

Site plan preparation for permit and construction to help bring your project to life!

Metro stormwater infill

Which tier is your project?

Metro Nashville sorts residential infill by how much net new impervious area (roof, driveway, patios) a project adds. The tier sets what your plan needs, and what I prepare for it.

Tier I & II

800–8,000 sf net new impervious

What I provide
Infill site plan and stormwater checklist, plus green infrastructure sizing (dry well, rain garden, permeable pavers, cistern) for the one-inch capture. Where capture isn't practical on the lot, a 10-year downstream drainage analysis, pending discussion with MWS staff.

Tier III

8,000–15,000 sf net new impervious

What I provide
PE-sealed plan, 10-year pre/post runoff analysis, detention design and downstream drainage analysis.

Quick tier check

Rough numbers are fine. I'll confirm with your survey.

Net new impervious: –
Enter existing and final impervious area to see which tier applies.

Based on Metro Nashville Stormwater Management Manual, Vol. 1, Appendix D, Regulated Residential Infill (2026). MWS makes the final determination.

Common questions

When do you need a plan?

The usual reasons builders, architects and homeowners call.

Do I need a site or grading plan to build a house in Nashville?

Often, yes. Metro Nashville and the surrounding cities typically require a site plan with grading and drainage for new homes, rebuilds and larger additions. I'll tell you what applies to your lot after looking at the survey.

What is a critical lot plan?

Some lots are marked critical on the subdivision plat, usually because of steep slopes or other site constraints. Building on one generally requires a sealed critical lot plan showing grading, drainage and erosion control before a permit is issued.

Do I need a stormwater infill plan?

In Metro Nashville, new homes, rebuilds and additions that add 800 to 15,000 sq ft of net new impervious area fall under Regulated Residential Infill. Projects are sorted into Tier I (800 to 2,500 sq ft), Tier II (2,500 to 8,000) or Tier III (8,000 to 15,000). Most must capture the first inch of runoff from the added area, and Tier III also needs a PE-certified design with no increase in the 10-year peak flow.

Do I need a plan for a pool or pool house?

Often. A pool, deck, pool house or sport court adds impervious area and changes how the yard drains. In Metro Nashville, adding 800 sq ft or more of net new impervious area brings the project under residential infill review. Belle Meade, Forest Hills, Oak Hill and the surrounding cities each have their own requirements, and I'll check which apply to your lot.

Do Belle Meade, Forest Hills and Oak Hill have their own requirements?

Yes. They are separate cities within Davidson County with their own zoning, building and site plan review, separate from Metro Nashville's. I prepare plans to each city's own requirements, as well as for Metro Nashville and the surrounding counties.

Do you work outside Davidson County?

Yes. I prepare residential plans for Franklin, Brentwood, Murfreesboro, Mt. Juliet, Hendersonville, Gallatin, Clarksville and the other communities listed below, following each city's or county's own requirements. I'm also licensed in Kentucky and Illinois and take projects there.

Service area

Nashville & surrounding communities

Based in Pegram, just west of Nashville. Plans are designed from your survey data, so every community below gets the same service. I'm also licensed in Kentucky and Illinois and welcome projects there.

Metro Nashville

NashvilleGreen HillsAntiochBellevueDonelsonEast NashvilleMadison

Davidson County satellite cities own codes & review

Belle MeadeForest HillsOak HillBerry HillGoodlettsville

Williamson County

FranklinBrentwoodNolensvilleSpring HillThompson's Station

Rutherford County

MurfreesboroSmyrnaLa Vergne

Wilson & Sumner

Mt. JulietLebanonHendersonvilleGallatin

Montgomery, Robertson & Cheatham

ClarksvilleSpringfieldAshland CityPegram

Montgomery Robertson Sumner Cheatham Davidson Wilson Dickson Williamson Rutherford Maury

Recent residential work

Projects

Modern duplex townhome infill

Duplex townhome

Oceola Ave – Modern Infill Duplex

Modern townhome building

Multi-family townhomes

Youngs Lane – High-End Multi-Family Townhomes on the Cumberland River

Brick townhome building

Multi-family townhomes

Portland Avenue – High-End Multi-Family Townhomes near Belmont University

Aerial view of modern white infill townhomes on Lenox Avenue

Multi-family townhomes

Lenox Avenue – Modern Infill Townhomes

Modern four-story condo building on Long Boulevard in Midtown Nashville

Multi-family condos

Long Boulevard – Luxury Stacked Condos near Midtown

New white farmhouse-style single-family home with two-car garage on Elkins Avenue

Single-family new construction

Elkins Avenue – Single-Family New Construction with Floodplain Considerations

High-end white brick single-family home with dormers on a wooded lot

Single-family new construction

Richfield Avenue – High-End Single-Family in the Hillwood Area

Aerial rendering of three modern townhome buildings around a shared paver courtyard on Watts Lane

Multi-family townhomes

Watts Lane – Modern Urban Townhomes in the Charlotte Park Area

Row of modern brick and siding duplexes with front porches on D.B. Todd Jr. Boulevard

Multi-family duplexes

D.B. Todd Jr. Boulevard – Downtown Nashville Urban Duplexes

Modern luxury custom home with stone and wood facade on a sloped critical lot near Nolensville

Single-family new construction

Woodland Hills – Luxury Custom Homes on a Critical Lot in the Nolensville Area

High-end modern stucco luxury home lit at dusk with cobblestone drive on Trimble Road

Single-family redevelopment

Trimble Road – Single-Family Reconstruction, High-End Luxury Home in the Belle Meade Area

Luxury custom home with stone and shingle facade and dormers in Eleanor Village, Ashland City

Single-family new construction

Eleanor Village Subdivision – Luxury Custom Home in Ashland City

Modern dark-sided luxury custom home with stone columns on a sloped critical lot in Woodland Hills

Single-family new construction

Woodland Hills – Luxury Custom Home on a Critical Lot in the Nolensville Area

White brick luxury custom home with steep gables at sunset in The Reserve at Raintree, Brentwood

Single-family new construction

The Reserve at Raintree – Luxury Custom Home on a Critical Lot in Brentwood

Aerial view of a white brick luxury custom home with retaining wall on a sloped lot in The Reserve at Raintree, Brentwood

Single-family new construction

The Reserve at Raintree – Luxury Custom Home on a Critical Lot in Brentwood

Red brick luxury custom home with steep gables on a wooded lot in The Reserve at Raintree, Brentwood

Single-family new construction

The Reserve at Raintree – Luxury Custom Home on a Critical Lot in Brentwood

Aerial view of a luxury estate home on a large lot beside a creek and floodplain on Post Road, Belle Meade

Single-family new construction

Post Road – Luxury Custom Home with Floodplain Development in the Belle Meade Area

Three custom urban townhomes with front porches and balconies on Lischey Avenue in East Nashville

Multi-family townhomes

Lischey Avenue – Custom Urban Townhomes in East Nashville

Daniel Smola, P.E.

About

One engineer, start to finish

I’m Daniel Smola, PE, founder and principal engineer of Harpeth Civil. I’ve spent more than 20 years in civil engineering, starting in 2005 with residential site design, septic design, and stormwater management. Since then I’ve worked as a field construction engineer on state highway projects and spent several years with a top Nashville firm as a project engineer and manager on land development projects across Middle Tennessee.

I founded Harpeth Civil in 2019 to bring the quality and technical depth I gained over my career to a more personal scale with my clientele and projects. Running my own practice lets me stay closely involved in every project from start to finish and build lasting relationships with the clients I work with. Every plan is designed, checked, and sealed by me, so you always talk to the person doing the work. My background in the field shapes how I design, too: I know what it takes to build what’s on the page, and I aim to deliver plans that move smoothly from permitting through construction. No project is too big or small.

500+Projects completed
TN · KY · ILPE licensed
2019Founded
Precision, integrity and client service: accurate plans that cut RFIs, honest timelines, and an engineer who stays with you through permitting.

Request a quote

Tell me about your lot

A survey and address are enough to start. Or call (615) 730-3502.