Building in Dripping Springs: Who Permits Your Acreage Home, and What the Land Decides Before Design

A Dripping Springs mailing address does not establish who permits your house. The parcel can sit inside the city limits, inside the city’s extraterritorial jurisdiction (ETJ), or in unincorporated Hays County outside any city’s ETJ, and which one it is decides who issues the building permit and who issues the septic permit for anyone building in Dripping Springs. Sorting that out is the first decision on any acreage, before the floor plan, because it sets where the well goes, where the drainfield can sit and how the outdoor lighting is designed.

Quick answer: inside the Dripping Springs city limits, the city’s Building Department permits the home. In the ETJ, a recorded development agreement or a council authorization decides whether the city is involved. In unincorporated Hays County outside any city’s ETJ, Hays County Development Services handles the development, floodplain and septic permits. The parcel decides, not the address.

Building in Dripping Springs Means One of Three Permitting Situations

Inside city limits, the City of Dripping Springs Building Department issues the residential building permit. Applications go through the MGO Connect portal, and plan review and inspections run through the city’s contracted third-party agency. The city publishes processing expectations rather than promises: up to five business days to accept an application, three more to start plan review once payment is made, up to twelve business days for consolidated comments or approval, and a total expectation of 22 business days without a resubmittal or 30 with one. The FY2026 fee schedule lists the new one- and two-family residential permit at $1.00 per square foot and the residential septic permit at $600 plus a $10 state fee. If the lot is on septic, the city states that the building permit will not be issued until the septic permit has been processed and approved by the City Sanitarian. That one sequencing rule sets the schedule from the start.

In the ETJ, the city does not automatically require a building permit. City of Dripping Springs Ordinance 2023-37 states that building permits are required in the ETJ only in accordance with an applicable development agreement or another authorization approved by the council. The recorded agreement, any amendments to it, and any separate council authorization decide, not the map alone.

In unincorporated Hays County outside any city’s ETJ, Hays County Development Services handles the development and floodplain permit and, where a septic system is proposed, the OSSF permit; driveway and utility work in a county right-of-way goes through the county’s Transportation department, and the Fire Marshal’s office reviews what its rules cover. The county states on its floodplain page that all development, inside or outside the floodplain, requires a county permit. Hays County is also rewriting its development regulations in a multi-phase process, so confirm current requirements with Development Services at the time of application.

To find out which situation applies, start with the Hays Central Appraisal District parcel record, check it against the city’s current limits and ETJ maps, read every recorded agreement and restriction on the tract, and get written confirmation of jurisdiction from the offices involved. That is the first step in building on your own land in Texas anywhere, and here it decides which office, or offices, you are dealing with.

Three Illustrative Situations, Not Real Addresses

A city lot on septic. Inside the city limits, the application goes through MGO Connect. The City Sanitarian must approve the septic permit before the city issues the building permit, so the site and soil evaluation for the drainfield starts early, alongside preliminary design rather than after it. The city’s outdoor lighting ordinance applies.

An ETJ tract with a development agreement that requires city review. The agreement’s terms, amendments and any council authorization set what the city reviews and whether its lighting rules apply. Hays County still handles the septic and floodplain permits, so two offices may be reviewing two parts of the same project at once.

An unincorporated tract outside any city’s ETJ. Hays County handles the development and floodplain permit and the septic permit; driveway approval runs through Transportation; the Fire Marshal reviews what its rules cover. Recorded restrictions are a separate question from jurisdiction: an acreage listing does not establish that no HOA or architectural review exists, so read the title documents.

Water Is a Decision Gate, Not a Line Item

Water is the first physical gate on any acreage tract served by a well. Confirm the parcel’s groundwater district first. In western Hays County that is the Hays Trinity Groundwater Conservation District. A domestic well serving one private household and incapable of producing more than 25,000 gallons a day is exempt from district permitting and metering under state law, but a well-construction notification, filed with the required fee and map, still has to be confirmed by the district before drilling, and the statutory ceiling on the district’s construction fee is $1,000.

As checked on September 24, 2026, HTGCD’s drought management page posts Emergency Stage: 40 percent curtailment district-wide and 30 percent in the Jacob’s Well zone, with the district describing aquifer and river conditions as the worst in its 20-plus-year history, including 2011. The mandatory reductions bind non-exempt operators, utility customers follow their supplier’s rules, and during Critical or Emergency drought stages the district stops accepting new operating permit applications, permit amendments requesting more water, and new well-construction notifications for non-exempt wells. That status will change; the design question does not. Well yield and water quality get tested before the household, pool and irrigation demand is drawn, and a yield test today does not guarantee supply later. Once supply is confirmed, treatment is chosen from the water test, and our guide to whole-house water filtration for Hill Country wells covers the options.

Rainwater can carry part of that load, and Hays County offers a property-tax exemption on the qualifying value of a rainwater system that is the household’s primary water source, with at least 2,500 gallons of storage, operational before January 1 of the application year, reapplied for annually by April 30 through Hays CAD. The exemption applies to the county’s levy, not automatically to every taxing entity on the bill, and the 2,500-gallon threshold is a tax qualification, not a sizing guide; our page on rainwater collection for Hill Country custom homes covers sizing.

If the parcel is served by Dripping Springs Water Supply Corporation, get written connection confirmation. Its capital contribution fee for a new connection is $8,614, effective January 1, 2025, with other charges confirmed separately, and its Stage 4 restrictions, effective May 23, 2025 and still posted on September 24, 2026, prohibit automatic and drip irrigation. The landscape plan is designed to that.

Septic: Who Approves It, and What the Rules Assume

Outside the city limits, Hays County, the authorized agent, states that a permit is required for all on-site sewage facilities regardless of the size of the lot or acreage; its single-family OSSF permit application fee is $610 plus the $10 state fee under the schedule effective January 1, 2026. State rule 30 TAC 285.3(f)(2) contains a conditional exemption for a single-family residence on 10 acres or more, but only when it is the only dwelling on the tract, every part of the system sits at least 100 feet from the property lines, effluent stays on the property and the system causes no nuisance or pollution, and local programs can be stricter. A guest casita can end the exemption on its own, and the county order adds a second casita rule worth knowing: a lot keeps its single-family septic status with a guest house, pool house or garage apartment only if the accessory floor space is under 50 percent of the primary dwelling’s, it is never rented or offered for public use, and it cannot be sold separately. We design as if the permit is required and ask the permitting authority for a written determination before anyone relies on the exemption.

The state floor in 30 TAC 285.4 is half an acre with public water and one acre on a private well for lots platted or created after the rule took effect, but Hays County’s own On-Site Sewage Facility Order is stricter, and it is the one that governs here. Its Table 10-1 sets the minimum lot size by three things at once: where the lot sits (Edwards Aquifer recharge zone, contributing zone, or elsewhere), the water source, and whether the system is conventional or an advanced system as the county defines it. Outside the Edwards zones, a lot on a private well needs 1.5 acres for an advanced system and 2 acres for a conventional one; in the contributing zone those become 2 and 3 acres; in the recharge zone, 3 and 5. Where two water sources apply, the larger minimum governs, and a system design that needs more ground overrides the table. One footnote on that table matters more than the numbers above it: for new subdivisions served by individual private wells inside a Priority Groundwater Management Area, where the county requires a demonstration of water availability, the minimum is 6 acres for either system type. Ask which line of the table your lot sits on before you assume the smaller number. That table is also the practical answer to whether a lot ends up conventional or advanced: on a tract that clears the advanced minimum but not the conventional one, the system type is decided before the house is, unless the county approves a variance, lot-size averaging or an innovative-development plan. Advanced treatment includes aerobic treatment units, and those carry a maintenance contract. State rules set an initial two-year service period, and the county’s order starts the contract on the date of the notice of approval to operate, with continuing maintenance after it. The design consequence is the same in every situation: the drainfield competes with the house, the pool, the casita and the tree canopy for the same ground, so the site and soil evaluation runs with preliminary design, not after it. Our aerobic septic system cost guide for Texas covers the systems themselves.

Dark Skies: Mandatory in the City and Certain ETJ Subdivisions

Dripping Springs became the first International Dark Sky Community in Texas, and the sixth in the world, in 2014, a designation from what is now DarkSky International. The city’s lighting guidance regulates three things: shielding, so light is directed downward and only where it is needed; brightness and color, with outdoor lighting no more than 3000K; and total output, with a residential allowance of 25,000 lumens per acre. Compliance is required inside the city limits and in the ETJ subdivisions bound by a development agreement or variance, which the city lists on its lighting jurisdiction page; the city describes compliance elsewhere in the ETJ as voluntary. For anyone building in Dripping Springs, the design consequence is that fixtures, shielding and placement are chosen with the elevations, not after the house is built, and our guide to dark-sky-compliant lighting for Hill Country homes covers the fixtures.

Floodplain, Wildfire and the Tax on the Land

Building in Dripping Springs also means checking two flood maps. FEMA released preliminary flood maps for Hays County for public review in March 2025. Check the parcel against both the effective map and any preliminary map still pending, because a parcel that reads clear today can sit inside a newly mapped Special Flood Hazard Area once an update takes effect.

Hill Country cedar, canyon terrain and exurban growth put much of the area in the wildland-urban interface as the Texas A&M Forest Service describes it, and its Wildfire Risk Explorer gives a parcel-level view. Defensible space is designed with the landscape plan; our piece on Austin’s wildfire and WUI codes explains the design side, though Austin’s code does not apply here.

If the tract carries an agricultural appraisal, a change of use triggers a rollback on the 1-d-1 category equal to the tax difference for the previous three years, with no interest since a 2021 change in the law; the three-year period dates to 2019. A sale alone does not trigger the rollback if agricultural use continues and the new owner reapplies, and Hays CAD can identify which acreage a homesite conversion affects. Ask before you close, because the number can be substantial.

Private Restrictions Are a Separate Question

Read the title documents, recorded restrictions and any architectural-review requirements before purchase, because a restricted tract answers to a declaration as well as a permit office. Neither an acreage listing nor a location outside the city limits establishes freedom from private restrictions, and private approval never replaces a public permit. Where restrictions exist, the declaration decides setbacks, materials and review, and it is read before schematic design.

What We Confirm Before Fixing the Site Plan

Before the site plan is fixed, we assemble written jurisdiction confirmation, the recorded agreements and restrictions, the well or provider findings, the septic site evaluation, the effective and preliminary flood mapping, and a tree and topographic survey, and we run those investigations alongside preliminary design rather than in series. The dependencies that are real get tracked as dependencies: in the city, septic approval before the building permit issues; on a well, yield before the water-dependent program is drawn. That order pays because each finding narrows where the house can sit.

Frequently Asked Questions

Does a Dripping Springs address mean I need a city building permit?

No. Building in Dripping Springs starts with the parcel’s current jurisdiction. City building permits apply inside the city limits; in the ETJ, an applicable development agreement or council authorization decides whether one is required. Check the current maps and recorded documents, then confirm with the permitting offices.

Who approves the septic system on acreage near Dripping Springs?

Inside the city, the City Sanitarian must approve the septic permit before the city issues the building permit. Hays County handles septic permits in its unincorporated jurisdiction, including the ETJ areas described here. Confirm the authority for your parcel before a design is submitted.

Does owning 10 acres mean I can skip the septic permit?

No. Hays County states that septic permits are required regardless of acreage. State rules contain a conditional exemption for a single residence on 10 or more acres, but Hays County’s own septic-permit guidance states that a permit is required for all on-site sewage facilities regardless of acreage, so obtain a written determination rather than assuming the exemption applies.

Can I drill a well, and do I need a permit?

Confirm the groundwater district first. Within Hays Trinity Groundwater Conservation District, a domestic well serving one household and incapable of producing more than 25,000 gallons a day is exempt from district permitting, but you file a construction notification, with the required fee and map, and get the district’s confirmation before drilling. Exemption does not establish adequate supply.

Does the Dark Sky ordinance apply outside the city limits?

Yes, in the ETJ subdivisions bound through development agreements or variances, which the city lists. Elsewhere, the city describes compliance as voluntary. Check the parcel’s recorded documents and the city’s current jurisdiction guidance.

Does HOA approval replace the county or city permit?

No. Any required homeowners association architectural approval is separate from the public permits that apply to the parcel. Obtain each approval the parcel and the work require; neither substitutes for the other.

If you are looking at acreage around Dripping Springs and want to know who will permit the house, what the well test and the septic evaluation will need to show, and what the recorded documents allow before you commit to the land, start a conversation with our team, and we will walk through the investigations with you and tell you plainly what they mean for the site plan.