What to Know Before Building a Custom Home in Marvin, NC

A custom home Marvin NC is not a Mecklenburg County project. Marvin is an incorporated village in Union County, and the Village issues the zoning permit while Union County issues the building permit only after that zoning approval. [1] Lot size, setbacks, and tree rules live in the Marvin Development Ordinance, adopted in 2024 and amended since. [2][3] Many lots still run on a well and a septic system rather than public water and sewer. [4] Before anyone sketches a floor plan, confirm the zoning district, any recorded homeowners association covenants, and a county soil evaluation. Those three items decide more of the house than the finish schedule does.

Marvin sits in Union County, with two permit desks

Clients who already own in Myers Park or SouthPark sometimes assume Charlotte or Mecklenburg rules travel with them. They do not. The Village of Marvin Planning Department reviews zoning, subdivision plats, setbacks, and related land-use applications. [2] The Village Council adopted the Marvin Development Ordinance (MDO) on May 14, 2024, replacing older zoning and subdivision chapters, and it has adopted further amendments since, including a June 10, 2025 text amendment to the district standards. [2][3][5]

Zoning permits are required for new houses, remodels, renovations, additions, outside storage buildings, attached decks, tree removal, swimming pools, home-based businesses, and signs. [1] Typical Village turnaround is 24 to 48 hours. [1] The Village does not issue building, electrical, or mechanical permits. Union County Building Code Enforcement does that work from 500 North Main Street in Monroe, and a Village zoning permit must be in hand first. [1]

That sequence matters. A set of construction drawings that ignore Marvin setbacks, tree conservation, or a septic repair area will stall at the county desk even if the architecture is otherwise sound. We treat the Village application as the first real gate, not a formality after the house is designed.

The same two-desk path applies if you are adding onto an existing Marvin house rather than building new. The Village lists remodels, renovations, and additions among the work that needs a zoning permit. [1] We are a building company, not only a new-home shop, so that path is familiar to our team.

Lot size and setbacks set the envelope of the house

Marvin’s residential districts are not interchangeable. Rural Residential (RR) is written to protect low-density houses in a traditional rural setting, including agricultural uses and open space. The RR dimensional table requires a 2.5-acre minimum lot, 144 feet of lot width, a 50-foot front street setback, a 40-foot rear yard, a 16-foot side yard, and a 25-foot corner side-street setback. Density is limited to 0.34 units per acre, excluding qualifying accessory dwellings. [3]

Single-Family Residential districts (SFR-1, SFR-2, SFR-3) are the Village’s primary neighborhood districts. Allowed building types are detached houses (including duplexes). The ordinance states that neighborhoods in these districts are the dominant land use in Marvin and a major element in defining community character, and that new work should maintain that character. [3] Gross density limits are 1.00 unit per acre in SFR-1, 2.00 in SFR-2, and 3.00 in SFR-3. [3]

Minimum lot sizes are 34,900 square feet in SFR-1, 17,450 square feet in SFR-2, and 11,600 square feet in SFR-3. Principal-structure front setbacks, measured from street right-of-way, are 50 feet, 33 feet, and 20 feet in those three districts. Rear setbacks are 40, 30, and 20 feet. Side setbacks are 16, 9, and 5 feet. Corner lots pick up larger side-street setbacks of 25, 21, and 17 feet. Accessory buildings sit farther back from the street than the house (102 feet, 73 feet, and 60 feet of front setback in SFR-1, SFR-2, and SFR-3). [3]

Those numbers are not decoration. A 50-foot front setback on an SFR-1 lot, plus a 40-foot rear yard, plus side yards, plus a well radius, plus a septic field and a reserved repair area, can consume more of a “large” lot than a first walk-through suggests. Flag lots add another constraint. Marvin allows them only with a minimum total lot area of 2.5 acres (or larger if the underlying district requires it), and the flagpole area within the first 150 linear feet of the street does not count toward minimum lot area, setbacks, or other dimensional requirements. [6]

We start a Marvin house by staking the actual buildable pad, not by importing a plan that was drawn for a different county. The pad is what is left after setbacks, easements, tree conservation, utilities, and the septic layout. Everything else is secondary.

HOA covenants sit on top of village zoning

Village zoning is the floor, not the ceiling. Many Marvin neighborhoods are planned communities with recorded declarations. North Carolina’s Planned Community Act requires a declaration creating a planned community to be executed like a deed and recorded in every county where any portion of the community sits. Amendments are effective only upon recordation. [7] Marvin’s own subdivision ordinance requires planned communities, as defined by Chapter 47F, to establish a homeowners association and to show adequate provision for perpetual maintenance of private infrastructure and common areas. [6]

That overlay is where a Marvin project can quietly become a production-subdivision exercise if no one is paying attention. Covenants often reach materials, roof pitch, fence and pool locations, accessory buildings, mailbox design, exterior lighting, and tree clearing. Architectural review can take as long as the Village zoning permit, and it can be stricter. None of that appears on the zoning map.

The practical step is simple. Pull the recorded declaration, bylaws, and any design guidelines from the Union County Register of Deeds (or from the association) before schematic design. Confirm whether the lot is subject to a mandatory association, who reviews elevations, and whether the covenants expire, have been amended, or conflict with what you actually want to build. We will not guess at a neighborhood’s taste. We will read the documents and design inside them, or tell you early if the documents and the house you want cannot be reconciled.

Well, septic, or public utilities

Marvin does not operate a municipal water or sewer utility. The Village states that many residents have a septic tank and well, and that where water and sewer connections are available, Union County provides the service. [4] Electric service is typically Union Power Cooperative. Gas, where it exists, is typically Piedmont Natural Gas. [4]

The MDO is more specific for new development. Where public water or sewer lines are available, the development must extend them to each lot. Where they are not available, structures must connect to an approved private water supply and sewage disposal system. “Available” inside the Village means an existing line of adequate size and pressure crossing the property or immediately available from an adjacent public right-of-way, or a Village commitment to extend under a development agreement. [6]

That is why a Marvin lot can look similar to its neighbor and still be an entirely different utility problem. One street may have county water. The next may be wells. Sewer is even less uniform. Do not assume “Marvin” means public utilities, and do not assume a well-and-septic lot is automatically simpler. It is a different engineering problem, and it should be solved before the house is sited.

North Carolina well construction standards require, among other things, that a single-family dwelling well sit at least 50 feet from a septic tank and drainfield, including the drainfield repair area. The distance rises to 100 feet if the septic system is installed in saprolite, or for facilities other than a single-family dwelling. [8] NC State Extension notes that ground water moves more slowly through the denser clay and rock of the Piedmont than through Coastal Plain sands, so well yields tend to be lower, and that the casing should terminate at least 12 inches above land surface. Union County is among the counties Extension lists as having its own well siting and construction ordinance, so the county health department, not a statewide summary, is the last word on a given parcel. [9]

Piedmont clay, soils, and why the drainfield comes first

If the lot needs a septic system, the soil evaluation is not a closing checklist item. It is the thing that tells you whether the house you have in mind can exist. State law requires a comprehensive soil and site evaluation by the local health department. An improvement permit must be obtained before construction begins on the home or the septic system. [10] Under 15A NCAC 18E, an authorized agent investigates topography, slope, landscape position, soil morphology (horizon depth, texture, structure, consistence, color), soil wetness, soil depth, restrictive horizons, long-term acceptance rate, and available space, with profiles described across both the initial field and the repair area. Each profile is classified suitable or unsuitable, and the agent specifies overall site suitability. [11]

NC State Extension reports that nearly 50 percent of North Carolina homes use septic systems, and that a conventional tank-and-trench system is used at almost one-half of the homesites that have septic. [12][10] North Carolina has more than 400 different kinds of soil, and a 1-acre lot can contain several types. [12] Conventional systems work best in gently sloping, thick, permeable soils with deep water tables and bright red, brown, or yellow color, not gray mottles that signal seasonal wetness, and not very sticky clays. [12] Extension’s rule of thumb is that one acre with suitable soils and suitable topography is usually the minimum sufficient area, and that much larger lots are frequently needed where conditions are weaker. There must also be land for a repair area if the system later needs expansion or replacement. [10] Permits for septic systems are valid for no more than five years unless issued under special conditions. [10]

Bedroom count is not a decorating choice on a septic lot. A system is designed for a flow of 120 gallons per day per bedroom. [13] Sandy soils can accept more wastewater than clayey soils, which means smaller drainfields on sand and larger ones on clay. In North Carolina there must be 12 to 18 inches of unsaturated soil beneath the drainfield trench bottom. [13] State design tables make the clay penalty explicit. Long-term acceptance rates for Group I sands run 0.8 to 1.2 gallons per day per square foot. Group IV clays run 0.1 to 0.4. [14] That is not a rounding error. It is the difference between a compact field and a field that occupies a large share of the rear yard.

Marvin sits in the Piedmont. In a 2025 NC State Extension survey of representative row-crop fields, average clay content was about 30 percent in Piedmont and mountain soils, compared with about 20 percent in Coastal Plain and tidewater soils, and Piedmont soils were described as clay loams. [15] County soil survey maps and the USDA Web Soil Survey are useful for screening a parcel. They are not a substitute for the on-site evaluation. [10][16]

We will not place a driveway, pool, patio, or addition on a drainfield or its repair area. Driving, paving, or building on a system can crush components and compact the soil. Trees and shrubs should stay well off the field. Grass is the right cover. [13] If you later want a pool or a wing, the reserved repair area has to still be there. That is one reason a Marvin custom house should be planned as a long-lived home, not as a floor plan that consumes every remaining square foot of the lot.

Trees, stormwater, and the look of the lot

Marvin regulates trees with more than a courtesy note. Any land-disturbing activity or tree removal requires a Tree Disturbance Permit. [17] The Village permitting page lists tree removal among the work that also needs a zoning permit. [1] Tree Conservation Areas are sized by parcel. Lots from 55,000 square feet to 5 acres must provide a TCA of 1.5 percent of lot area, saving trees 4 inches or greater DBH in the required planting yards. Parcels of 5.01 to 10 acres rise to 3 percent, and parcels larger than 10 acres to 6 percent, with additional protection along side and rear lines. Hardwood stands sit at the top of the preservation priority list. [17]

That is part of why a Marvin house should not read as a scraped production lot. The ordinance is trying to keep canopy. A custom house that ignores it will look temporary even if the millwork inside is excellent. We prefer to site the building, the drive, and the septic field around the trees that are worth keeping, then mitigate only what construction actually requires.

Stormwater, floodplain, and erosion control are separate MDO articles. They matter on Piedmont clay, where runoff is slow to soak and easy to concentrate. The 2020 Land Use Plan, adopted November 10, 2020, still guides Village decisions, and the official zoning map was adopted with the MDO on May 14, 2024. [5] Read those documents for the parcel. Do not rely on a listing photograph.

A Marvin house should still read as a lasting home

Production subdivisions optimize yield. They repeat a plan, push the garage forward, and treat the lot as leftover space around the house. Marvin’s residential districts were written, at least on paper, against that instinct. RR exists to protect a rural pattern. SFR districts exist to complete neighborhoods and keep community character. [3] A custom house that merely maxes the heated square footage inside those setbacks is still a production house in better clothes.

What we look for instead is a building that belongs to its particular pad. That means a roof and massing that sit comfortably behind the required yards, a garage that does not dominate the street, materials that weather in Piedmont sun and clay soil, and a plan that can accept a later addition without landing on the septic field or the tree conservation area. It also means interiors that will still make sense in a few decades, which is how we think about every house we take on.

If you already own in Marvin and the right move is an addition or a renovation rather than a new house, the same literacy applies. Confirm the existing septic permit and repair area, the well setbacks, the HOA documents, and the Village zoning envelope before anyone talks about square footage. The Village already treats that work as permitted construction. [1] Our team does too.

Practical takeaways

• Confirm you are in the Village of Marvin (Union County), then file for the Village zoning permit before Union County will issue a building permit. [1]
• Read the zoning district on the official map and measure the actual setbacks. RR, SFR-1, SFR-2, and SFR-3 are not the same envelope. [3][5]
• Pull recorded HOA covenants and design guidelines. They can be stricter than the MDO and they are effective only if recorded. [6][7]
• Do not assume public water and sewer. Many Marvin residents are on well and septic, and public service, where it exists, is Union County’s, not the Village’s. [4]
• On a septic lot, obtain the improvement permit (and understand the repair area) before you commit to a house plan or a bedroom count. Clay soils need more field than sand. [10][13][14]
• Keep drives, pools, patios, and future additions off the drainfield and the repair area. [13]
• Budget time for tree-disturbance and zoning review if you intend to clear. Canopy is regulated, not optional. [1][17]
• Design the house for the leftover pad, not for a generic acre. Marvin should still look like a lasting home, not a production street.

How we can help

We have been building in the South Charlotte metro, including Marvin, since 2006. The work is family-owned, deliberately small, and led on site by Eric Brown. If you have a Marvin lot, a teardown candidate, or an existing house that needs a careful addition or renovation, we can walk the constraints with you before the first schematic. Start at our contact page, or look through recent work to see how we treat a house that is meant to last.

Citations

1. Village of Marvin, "Permitting" (accessed 2026-09-08)
2. Village of Marvin, "Planning & Zoning" (MDO adopted 2024-05-14)
3. Village of Marvin, "Marvin Development Ordinance Article 8: Districts" (amended 2025-06-10)
4. Village of Marvin, "Utilities" (accessed 2026-09-08)
5. Village of Marvin, "Land Use & Maps" (Land Use Plan adopted 2020-11-10; MDO and zoning map 2024-05-14)
6. Village of Marvin, "Marvin Development Ordinance Article 16: Subdivisions" (2024)
7. North Carolina General Assembly, "Chapter 47F, Article 2: Creation, Alteration, and Termination of Planned Communities" (current through SL 2025-97)
8. N.C. Office of Administrative Hearings, "15A NCAC 02C Well Construction Standards" (current)
9. NC State Extension, "Your Water Supply: Well Construction and Protection" (1996, reviewed 2025-07-07)
10. NC State Extension, "Investigate Before You Invest" (2020-07-15, reviewed 2025-04-23)
11. N.C. Office of Administrative Hearings, "15A NCAC 18E .0501 Site Evaluation" (eff. 2024-01-01)
12. NC State Extension, "Septic Systems and Their Maintenance" (2016-06-01, reviewed 2026-03-06)
13. NC State Extension, "Why Do Septic Systems Fail?" (2014-03-03, reviewed 2024-01-02)
14. N.C. Office of Administrative Hearings, "15A NCAC 18E .0901 General Design and Installation Criteria for Subsurface Dispersal Systems" (eff. 2024-01-01)
15. NC State Extension, "Overview of the Soil Fertility Status of Representative Row Crop Fields in North Carolina" (2025-01-30)
16. USDA Natural Resources Conservation Service, "Web Soil Survey" (accessed 2026-09-08)
17. Village of Marvin, "Marvin Development Ordinance Article 11: Landscape Requirements and Tree Protection" (2024)