A St. George community
Living in Topaz Estates.
Topaz Estates is a recorded large-lot subdivision off Topaz Road in the Diamond Valley area, roughly 15 miles north of downtown St. George on SR-18. Washington County zones the ground RE-40, which sets a minimum lot size around an acre, and Snow Canyon State Park sits just a few miles to the southwest.
I am Scott Buehler. I have worked Southern Utah real estate for 20-plus years, and this page sticks to what I can verify about Topaz Estates: the recorded plat, the zoning, the school boundary, and the honest drive to town.
Getting your bearings? Start with the St. George guide, then come back for Diamond Valley.
Current listings
Properties for sale in Topaz Estates.
No active listings today. Topaz Estates sits on RE-40 ground, so its acre-plus lots turn over in ones and twos rather than a steady stream, and nothing in Diamond Valley is on the market right now. A new property here lands on this page as soon as it hits the Washington County MLS. Prefer to hunt on your own? Open the map search or start from the homepage.
Buying here
Be first in line when one lists.
I watch the Washington County MLS for Diamond Valley activity, and Topaz Estates is easy to flag since it is a defined RE-40 plat on private well and septic, about 20 to 25 minutes from town near Snow Canyon State Park. Tell me you want this pocket and I will call you the day a property lists, acre lot and all.
Selling here
Own a property in Topaz Estates?
Buyers check this exact page hoping to find your street. When you are ready, list it with me and get featured on MovingUtah. Start with an honest read on what your property is worth.
Listing information comes from the local MLS and is deemed reliable but not guaranteed.
On this page
Life on acreage
Diamond Valley trades convenience for space.
Topaz Estates sits inside Diamond Valley, an unincorporated pocket of Washington County built almost entirely on large residential lots. The county's own general plan for the area marks it low-density residential, surrounded by Bureau of Land Management and State of Utah land on most sides. That is not a marketing description, it is the zoning map: this is acreage country by design, not by accident.
The street grid here carries a gemstone theme, Sapphire Trail, Jade Court, Onyx Court, Garnet Court, Opal Court, Amethyst Drive, Emerald Drive, all feeding off Diamond Valley Drive and Topaz Road. It is a small, self-contained community, not a subdivision that blends into the next one.
The trade for that space is distance. Diamond Valley Drive and SR-18 are the only paved way in and out, and every trip to a grocery store, a hospital, or a big-box store means a drive of some length. For buyers who want elbow room and are willing to plan their errands, that trade works. For buyers who want to walk to a coffee shop, it will not.
Diamond Valley highlights
What sets this pocket of the county apart.
Four things define Topaz Estates and the surrounding Diamond Valley grid: the recorded plat itself, the RE-40 zoning floor, an elementary school inside the community, and Snow Canyon State Park a short drive to the southwest.
A recorded plat, not an informal name
Topaz Estates is filed with Washington County as subdivision code TE, with a later amended phase covering lots 7 and 8. It is a legal plat, so the boundary is a matter of record, not a marketing line on a map.
RE-40 zoning, an acre floor
Washington County zones this ground RE-40, residential-estate with a roughly one-acre minimum. That floor is what keeps Diamond Valley from ever infilling into a standard subdivision.
An elementary in the community
Diamond Valley Elementary, grades K-5, sits at 1411 W Diamond Valley Drive, inside the same community cluster as Topaz Estates. County land-use maps mark it directly on the school site.
Snow Canyon State Park nearby
Snow Canyon's boundary extends northeast to a pair of cinder cones along the edge of Diamond Valley. The park entrance off Snow Canyon Drive is roughly a 10 to 15 minute drive from Topaz Estates.
Land & homes
Large lots, private systems.
Topaz Estates is platted under Washington County's RE-40 zone, which sets a minimum lot size of roughly one acre. That single fact shapes everything else about the community: it is not a builder-graded subdivision with matching setbacks and a shared architectural pattern, it is a plat of large parcels that owners have built out individually over time.
Because the county has no municipal water or sewer line running to Diamond Valley, every property here runs on a private well and an on-site septic system. That is standard for the whole Diamond Valley area, not unique to Topaz Estates, but it is the detail that changes how you own the property day to day. A well's flow rate and a septic system's age and capacity are the kind of shared-system due diligence that a denser subdivision would put on the seller disclosures instead.
I am not going to publish a price band or a median for Topaz Estates. Acreage plats like this one sell in small numbers, sometimes a handful of closings in a year, and any figure I quote today is likely stale by the time you read it. Pull the live listings above, or ask me and I will run current comps against the specific lot size and build you are comparing.
On an RE-40 acreage plat, the zoning floor tells you more about the neighborhood than any single listing does.
Trails & outdoors
Snow Canyon is the close neighbor.
Snow Canyon State Park's own boundary reaches northeast across SR-18 to take in two cinder cones on the edge of Diamond Valley, which makes it the genuinely close outdoor asset here, not a name borrowed from somewhere else in the county.
Snow Canyon State Park, ~10-15 min
Reached via Snow Canyon Drive off SR-18. Petrified sand dunes, red and white sandstone cliffs, and a paved multi-use trail run the length of the park.
Diamond Valley cinder cones (easy)
A short volcanic hike inside Snow Canyon's boundary but reached from the Diamond Valley side. The cone climb opens a view of Pine Valley Mountain to the east and the red cliffs of Snow Canyon to the south.
Pine Valley Mountain, ~45 min
A separate drive north on SR-18 then east on Pine Valley Highway into Dixie National Forest, with pine-forest camping and trailheads well above the valley floor.
BLM and state land at the door
Washington County's Diamond Valley general plan shows Bureau of Land Management and State of Utah ownership wrapping most of the community, with the Red Mountain Wilderness bordering to the west.
Trail and park details come from Snow Canyon State Park's official pages and Washington County's Diamond Valley Community General Plan.
Errands & drive times
Everything runs through SR-18.
Diamond Valley Drive feeds directly onto SR-18, the single paved corridor connecting Topaz Estates to St. George. Times below are measured from the Topaz Road area to named destinations along that corridor. Add a few minutes from the far side of the plat.
| The errand | Where it happens | From Topaz Road |
|---|---|---|
| Full grocery run | St. George grocery chains along Bluff St / Dixie Dr | ~20-25 min |
| Closer grocery option | Harmons, 3520 Pioneer Pkwy, Santa Clara | ~20 min |
| Hardware and big-box | Home Depot / Walmart, St. George | ~25 min |
| Hospital | Intermountain St. George Regional Hospital, 1380 Medical Center Dr | ~25 min |
| Freeway on-ramp | Interstate 15 at Exit 6, Bluff Street | ~20 min |
| Flights | St. George Regional Airport (SGU) | ~30 min |
| Snow Canyon State Park | Snow Canyon Drive entrance | ~10-15 min |
| Pine Valley Mountain | Pine Valley Recreation Area, Dixie National Forest | ~45 min |
The drive is the trade for the acreage. Most owners I have worked with here plan errands into single trips rather than running to town on a whim. The full day-trip and city map lives in the St. George guide.
Schools & education
Schools, by the facts.
Topaz Estates falls inside the attendance boundary for Diamond Valley Elementary (grades K-5), a Washington County School District school at 1411 W Diamond Valley Drive, inside the same community cluster as the subdivision.
Diamond Valley is one of the district's split-feeder elementaries: depending on the exact sub-boundary, it can feed into either the Dixie cone (Tonaquint Intermediate, Dixie Middle, Dixie High) or the Enterprise cone (Enterprise High, grades 7-12). I am not going to assign one flatly for Topaz Estates, because the district's own feeder map treats the whole elementary as a split. Confirm the middle and high school assignment for any specific address directly with Washington County School District before you rely on it.
I cover the bigger education picture in the St. George guide.
Living off city utilities
What RE-40 acreage asks of an owner.
It is worth saying plainly, because it is the reason this section exists: Diamond Valley is unincorporated Washington County, not a St. George city subdivision. There is no municipal water or sewer main running to Topaz Estates, which is exactly why the county's own general plan colors this whole area "low-density residential" rather than a standard growth zone.
That means every property runs on a private well and an on-site septic system. A well's flow rate and static water level tell you whether it can support the household you are planning, and a septic system's age, tank size, and drain-field condition tell you what you are inheriting. Neither shows up on a listing photo, and neither is something I would skip checking.
It also means county-level services, not city ones, apply here: road maintenance, fire response, and any future utility extension are Washington County matters, not St. George City matters, even though the mailing address says St. George. I would confirm exactly what that means for a specific parcel with the county before writing an offer.
What I check before I call an acreage lot ready to buy
- The well's flow rate, static water level, and pump age, ideally with a recent water test.
- The septic system's permitted capacity, tank age, and last pump or inspection date.
- The parcel against Washington County's zoning and subdivision GIS layers, to confirm the exact recorded boundary and RE-40 setback rules.
- Fire response and road maintenance responsibility with Washington County directly, since this is unincorporated ground.
This is general guidance, not an engineering or legal determination. Confirm any specific property with Washington County, a licensed well or septic inspector, and your title company before you rely on it. Sources: Washington County GIS zoning and subdivisions layers, and the county's Diamond Valley Community General Plan.
What locals know
Notes from Diamond Valley.
No listing photo tells you this part. After more than 20 years working Southern Utah real estate, here is what I would tell a friend about Topaz Estates.
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SR-18 is the only way in. Every trip to town uses the same paved highway. Weigh that before you weigh anything else about the property.
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Two mountain views, one address. Pine Valley Mountain rises to the east and Snow Canyon's red cliffs sit to the southwest. Few Washington County addresses frame both from the same lot.
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Well and septic are not optional line items. They are the systems that decide what you can build and what you will maintain. Get both inspected before you get attached to a lot.
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County land wraps the community. BLM and State of Utah ground border Diamond Valley on most sides, which is part of why the space feels permanent rather than a subdivision waiting to be surrounded.
Buy or sell here
The buyer side and the seller side.
Buying in Topaz Estates
Topaz Estates is a recorded subdivision off Topaz Road in the Diamond Valley area, roughly 15 miles north of downtown St. George via SR-18. The lots sit inside Washington County's gemstone-named street grid, near Sapphire Trail, Jade Court, and Onyx Court, with Snow Canyon State Park just a few miles to the southwest.
Topaz Estates is zoned RE-40 by Washington County, which sets a minimum lot size around an acre. It is a platted subdivision of large residential lots, not a standard city subdivision, and properties here run on private well water and septic systems rather than city utilities.
The drive to downtown St. George runs about 20 to 25 minutes on SR-18, the same paved highway that connects Diamond Valley to Snow Canyon Drive and the I-15 interchange at Bluff Street, Exit 6. It is a straight corridor, not a maze of turns, which keeps the drive predictable in any season.
Topaz Estates falls inside the Diamond Valley Elementary attendance boundary, a Washington County School District school at 1411 W Diamond Valley Drive serving grades K-5. Diamond Valley is a split-feeder elementary, meaning it can feed either the Dixie cone or the Enterprise cone depending on the sub-boundary, so confirm the middle and high school assignment for a specific address with the district directly.
Ready to look? See what is on the market or tell me what you are after.
Selling in Topaz Estates
I do not publish a price range here because Diamond Valley acreage moves in small numbers of sales and last-check figures go stale fast. Pull the live listings below or ask me directly and I will run current comps for the specific lot size and build you are comparing.
Well water and septic are the two systems that change how you own the property day to day: know the well's flow rate and the septic system's age and capacity before you write an offer. Diamond Valley also sits well outside city utility and some city service boundaries, so confirm fire response, road maintenance, and any other services directly with Washington County.
List with me and your property is featured across MovingUtah, on this page, on the St. George hub, and in the featured listings buyers browse on this site. The get featured page walks through exactly how that works.
Acreage markets move on their own clock, with fewer comparable sales and buyers who take longer to decide. Tell me your timeline and I will give you a straight read using current Diamond Valley comps instead of a generic St. George number.
Yes. Timing an acreage sale with a city purchase is mostly a sequencing question, and because I am dual-licensed in real estate and mortgage lending, I can keep the sale, the search, and the financing conversation on one desk.
Thinking about it? Start with your number or see how featuring works.
Keep exploring St. George
Want a closer look at Topaz Estates?
Buying, I can pull the current Diamond Valley listings and walk you through the well, septic, and zoning questions before you compare properties. Selling, I will give you a straight number built on current acreage comps and a plan to get your property featured in front of the buyers already on this site.
Selling in Topaz Estates
Want to sell your home in Topaz Estates? List it with Scott Buehler and get featured on MovingUtah.
No best-agent claims and no guaranteed-price promises, just honest pricing built on current Diamond Valley acreage comps, not a citywide average.