Marble Falls is the outlier on this site, and it is worth understanding why. This is granite country — the Llano Uplift, roughly 1.3 billion year old Precambrian rock, not the Cretaceous limestone that defines the rest of the Hill Country. And unlike most Texas counties, Burnet County actually does issue a building permit in unincorporated areas. Both facts change your budget.
Building around Marble Falls
The city of Marble Falls had 9,633 residents in the July 2025 census estimate, up from 7,037 in 2020 — about 36% growth in five years. At that population its extraterritorial jurisdiction extends one mile past the city line under Local Government Code 42.021. That is a narrow band, which means most acreage people are looking at around Marble Falls is straight unincorporated Burnet County.
Inside the city, Development Services at 801 Fourth Street runs a conventional process: plan review, permit, staged inspections, certificate of occupancy. Outside the city, Burnet County does something unusual. It issues a Class A building permit for $25 outside flood hazard areas — application and payment only, with the county explicitly noting no structural inspections are required — and a Class B permit for $400 inside a designated flood hazard area, which requires an elevation certificate or engineer’s letter and does carry pre-pour and final inspections.
Read that carefully, because it is easy to misread. Burnet County still cannot zone. Its Class A permit is a records and floodplain-management instrument, not code enforcement. Nobody from the county is checking your shear connections or your header spans. If you want that oversight outside the city, you buy it — through a third-party inspector, a lender-required draw inspection program, or a builder who volunteers it.
The granite matters more than most people expect. Decomposed granite soils drain well and have far less shrink-swell than the clay and clay-over-limestone you fight in Comal or Hays County, which is genuinely good news for foundations. The tradeoff is that intact granite is brutally hard to trench, blast, or hammer. Utility runs, septic drainfields, and footings that hit competent rock cost meaningfully more here than the same work in limestone.
What people build here
Marble Falls draws two distinct barndominium buyers. The first is the Highland Lakes retiree or second-home buyer: 1,800–2,800 sq ft, single story, oversized garage or boat bay, big covered porch, and an eye on Lake LBJ or Lake Marble Falls access. Metal exteriors are broadly accepted out here, and the aesthetic reads as native rather than compromise.
The second is the working acreage build — 2,500–4,000 sq ft with a serious shop, out toward Spicewood, Bertram, Burnet, or the ranchettes off RR 1431 and US 281. Equipment storage, a welding bay, sometimes a small livestock setup. Post-frame and red-iron both do well; on granite, red-iron with a properly engineered slab is common because you are not fighting differential settlement the way you would on expansive clay.
A third pattern is growing fast: the shell-now, finish-later build. Put up the metal building and a slab for $55 to $85 per square foot, get it dried in, and finish interior in phases. Burnet County’s minimal permitting makes phased builds administratively simple. Inside Marble Falls city limits it is harder, because you need a certificate of occupancy to legally occupy.
Watch deed restrictions in the lake subdivisions and newer developments. Waterfront and near-waterfront communities around Lake LBJ and Lake Marble Falls tend to carry architectural committees, masonry requirements, and minimum square footage floors. Rural acreage is often lightly restricted or unrestricted. Verify per tract.
Permitting in and around Marble Falls
| Item | Inside Marble Falls city limits | Unincorporated Burnet County |
|---|---|---|
| Zoning | Yes — city zoning applies | None. Texas counties cannot zone |
| Building permit | Required — Development Services, 801 Fourth Street | Class A $25 outside flood hazard; Class B $400 inside flood hazard |
| Building code | City-adopted International code family | No county-adopted residential code |
| Structural inspections | Yes — staged inspections and CO required | None on Class A. Class B carries pre-pour and finished-construction inspections |
| Plan review | $60 (up to 3,000 sq ft) or $100 (3,001+ sq ft) | Not applicable |
| Septic / OSSF | City sewer where available; otherwise county OSSF | Burnet County Development Services: $250 standard, $400 aerobic |
| Floodplain | City floodplain development permit — $100, elevation certificate required | County development permit; 1-ft minimum freeboard, 2 ft recommended in A zones |
| Watershed | LCRA Highland Lakes Watershed Ordinance may apply | LCRA HLWO applies in the Colorado River watershed in Burnet County |
| Water well | City water typical | Register with Central Texas GCD — authorization required before drilling |
And note what nobody licenses: Texas does not license residential home builders. There is no state exam and no state registry. Vet on insurance certificates, workers’ comp, lien history, completed local references, and the state licenses held by the electrical and plumbing subs.
What it costs around Marble Falls
The Marble Falls city fee schedule is published, so we can show you an actual permit number instead of a shrug. For a 2,400 sq ft build inside the city: new construction at $0.10/sq ft = $240, electrical at $0.06/sq ft = $144, plumbing at $0.08/sq ft = $192, mechanical at $0.04/sq ft = $96, plus $60 plan review. That is roughly $732 in city permit fees, per the fee figures published in the city’s residential permit packet. Confirm current amounts with Development Services at (830) 798-7095.
| Line item | Typical range |
|---|---|
| Turnkey, mid-range finish | $120–$190 / sq ft |
| Shell only | $55–$85 / sq ft |
| Turnkey, high finish | $200–$280 / sq ft |
| Marble Falls city permit package, 2,400 sq ft | about $732 |
| Burnet County Class A building permit | $25 (outside flood hazard) |
| Burnet County Class B building permit | $400 (flood hazard area) |
| Burnet County OSSF permit | $250 standard / $400 aerobic |
| Aerobic septic system, installed | $14,000–$25,000 |
| Water well, drilled and equipped | $16,000–$27,000 |
| Well water treatment | $2,000–$5,000 |
| Driveway | $15–$40 / linear foot |
| Culvert and road entry | $1,500–$5,000 |
| Electric service, overhead | $5–$15 / ft |
| Electric service, underground | $10–$25 / ft |
| Rock excavation | $30–$75+ / cubic yard — competent granite runs at or above the top of the range |
| Total site work, raw acreage | $52,000–$114,000 |
Site notes for Marble Falls land
LCRA is the agency people underestimate here. It operates the Highland Lakes dams — Wirtz Dam forming Lake LBJ and Max Starcke Dam forming Lake Marble Falls — and it administers the Highland Lakes Watershed Ordinance across the Colorado River watershed in Burnet County. The ordinance triggers a development permit when impervious cover will exceed 10,000 square feet or land disturbance exceeds one acre. A single barndominium with a normal driveway usually falls under both thresholds and qualifies for a no-permit-required notification instead — but only if you are outside the creek buffer zones. Check the LCRA jurisdiction map for your parcel; do not assume.
Both Lake LBJ and Lake Marble Falls are pass-through, constant-level lakes rather than storage reservoirs, so they do not swing like Travis and Buchanan. LCRA does lower them periodically, typically in winter, for dam maintenance and shoreline work — useful timing if you are building a dock or a bulkhead. Constant level is not the same as flood-safe. The October 2018 Llano River flood was historic, took out the RM 2900 bridge at Kingsland, and put Marble Falls under evacuation orders. Pull the FEMA panel.
Groundwater outside city service runs through the Central Texas Groundwater Conservation District, which covers Burnet County. Its rules require registration of all wells and specific authorization before drilling begins — stricter than the register-it-afterward posture in some districts. Get the authorization before your driller mobilizes. Aquifers here are the Ellenburger–San Saba, Hickory, Marble Falls, and Trinity units, and yield varies sharply over short distances.
On foundations: granite and decomposed granite give you low shrink-swell and generally excellent bearing. Get a geotech report anyway. Around Marble Falls the boundary between granite, the Marble Falls Limestone, and overlying sediments can shift within a single parcel, and a slab designed for one is wrong for the other.
County permitting
Burnet County is unusual: it does issue a building permit and it permits OSSF directly. It still cannot zone, and the Class A permit carries no structural inspection. Details and office contacts are on our Burnet County page — call Development Services to confirm current fees and flood status before you buy.
Nearby towns
- Barndominium builders in Johnson City
- Barndominium builders in Blanco
- Barndominium builders in Fredericksburg
- Barndominium builders in Dripping Springs
Marble Falls barndominium questions
Does Burnet County require a building permit?
Yes, which makes it unusual among Texas counties. A Class A permit costs $25 outside designated flood hazard areas and requires only the application and payment — the county states no structural inspections are required. A Class B permit inside a flood hazard area costs $400 and requires an elevation certificate or engineer’s letter plus inspections. The county still has no zoning authority and adopts no residential building code.
Is building on granite more expensive than limestone?
For excavation, yes. Competent granite is harder to trench, hammer, and drill than Hill Country limestone, so utility runs, drainfields, and any footing that hits rock cost more. Budget at or above the top of the $30 to $75 per cubic yard rock excavation range and get a firm bid rather than an allowance. The offsetting win is foundations: decomposed granite soils have far less shrink-swell than clay.
Do I need an LCRA permit for a barndominium near Lake Marble Falls?
Usually not a full development permit. LCRA’s Highland Lakes Watershed Ordinance triggers at more than 10,000 square feet of impervious cover or more than one acre of land disturbance, and a single home with a driveway typically stays under both. Smaller projects outside creek buffer zones can file a no-permit-required notification instead. Confirm your parcel against LCRA’s jurisdiction map.
Can I drill a well outside Marble Falls?
Yes, but register first. The Central Texas Groundwater Conservation District covers Burnet County and requires registration of all wells plus specific authorization before drilling begins — not after. Expect $16,000 to $27,000 drilled and equipped, plus $2,000 to $5,000 for treatment. Yields vary sharply across the Ellenburger, Hickory, Marble Falls, and Trinity units, so ask neighbors what they actually hit.
Get matched with a builder near Marble Falls
Give us the tract, the square footage, and whether you are inside the city or out in Burnet County. We will match you with barndominium builders who work the Highland Lakes — people who have already priced granite excavation, filed OSSF applications with Burnet County Development Services, and know when LCRA needs a notification. Start here.
Cost ranges on this page are illustrative estimates compiled from Hill Country builders, licensed installers and public agency sources as of July 2026, not quotes — your site, finish level and rock conditions will move them. Government fees are as published by the issuing office on that date; confirm current amounts before you budget. This page is general information, not legal, engineering, or financial advice. This site is free to landowners and may be compensated by builders in its network.