Bolthole Index

Bexar County, Texas

Building permits, zoning and land rules in Olmos Park, Texas

Olmos Park, Texas requires a city building permit before construction, alteration or demolition, subject to specified exceptions.1 Olmos Park has its own zoning; Bexar County Environmental Services handles septic permits inside the city.23 In Olmos Park’s Single-Family Residence and Apartment Districts, trailers, camping units and motor homes cannot be used for dwelling or sleeping.4

At a glance

Building permits
Required from the city Building Official, subject to exceptions1
Zoning
City zoning and district-specific development rules apply25
Septic permits
Bexar County Environmental Services administers OSSF permits36
RV living
Dwelling and sleeping prohibited in Single-Family Residence and Apartment Districts4
Owner-builder
Possible surety-bond exemption for an owner’s own non-rental property; building permits still required71
Accessory buildings
Single-Family Residence Districts have accessory-building setbacks and a 25-foot height limit89

Who to call

Building permits

Olmos Park Building Department

City building plans, construction and trade permits, inspections, and zoning guidance

210-824-3281

120 West El Prado Drive Olmos Park, Texas 78212

Building permits

Olmos Park Building Official — permit requirements

City building-permit applications, surveys, plan review and inspection requirements

Septic permits

Bexar County Environmental Services

Septic permits, installation inspections, renewals and existing-system registration

210-335-6700

612 Nogalitos San Antonio TX 78204

Contact details are copied from each office’s official page and were checked against it on October 11, 2026.

Off-grid gear

Going off-grid in Olmos Park means bringing your own water and power. The kit we’d start with:

These are affiliate links — we may earn a commission, at no cost to you. As an Amazon Associate, Bolthole Index earns from qualifying purchases.

Do you need a building permit in Olmos Park, Texas?

Olmos Park requires a building permit from the city Building Official before a building or structure is erected, enlarged, altered, repaired, moved, removed, converted or demolished, subject to the city’s specified exceptions.1 Ask the Building Official to classify the proposed work before hiring a contractor or starting demolition.1 All work must meet the building-code standards adopted by Olmos Park.10 Starting work before obtaining a required building permit triggers a double fee.1

Olmos Park’s March 2026 fee schedule controls over conflicting fees in city forms or the code; building fees vary by project square footage and trade.11 A homeowner acting as their own contractor may qualify for exemption from the $5,000 general-contractor surety bond on non-rental property, but the exemption does not waive the building permit.7

Who handles building permits and zoning in Olmos Park?

The Olmos Park Building Department reviews building plans, issues construction and trade permits, conducts project inspections and provides zoning guidance.12 Contact the Building Department through the city’s published City Hall number, 210-824-3281, or visit City Hall at 120 West El Prado Drive Olmos Park, Texas 78212.12 Bring the proposed use and layout to the city so zoning and building requirements can be considered together.12

Septic approval is a separate county responsibility: Bexar County Environmental Services administers OSSF permits inside Olmos Park.3 For land outside the city, consult the Bexar County guide; the county’s ordinary residential building-permit answer is for unincorporated land, not Olmos Park.13

Does Olmos Park have zoning, lot coverage limits and setbacks?

Olmos Park has municipal zoning districts and publishes a zoning map and district-specific rules.25 Ask the Building Department to identify the parcel’s district before drawing a site plan; the department provides guidance on zoning and development standards.12

In Olmos Park’s Single-Family Residence Districts, detached accessory buildings generally must be at least 10 feet from the main structure, 60 feet from the front property line and 3 feet from rear or side property lines, subject to the code’s stated exceptions.8 Attached accessory buildings follow the main structure’s setbacks.8 Accessory-building height is limited to 25 feet, measured from the lowest ground level to the roof peak.9 Front-yard impervious cover in the Single-Family Residence Districts may not exceed 50% in aggregate.14 These accessory-building dimensions do not establish approval for an independent dwelling.8

Can you live in an RV or tiny home in Olmos Park?

In Olmos Park’s Single-Family Residence and Apartment Districts, trailers, camping units and motor homes may not be used for dwelling, sleeping, business or entertainment, or connected to sanitary sewer facilities.4 Parking permission therefore does not authorize living in an RV while building a house.4 The city separately allows limited front- or side-yard parking for preparing for trips, unloading and guest visits, subject to the parking conditions.4

We could not confirm an Olmos Park rule specifically allowing tiny-home occupancy, manufactured-home occupancy or an independent accessory dwelling; ask the city Building Department about the proposed dwelling type and use before buying.12 A building or structure still falls under Olmos Park’s building-permit requirement and adopted code standards, subject to applicable exceptions.110

How do septic permits work inside Olmos Park?

Bexar County Environmental Services handles septic permitting inside Olmos Park, and the county requires on-site sewage facilities to be permitted.36 Contact Environmental Services at 210-335-6700; the current office page lists 612 Nogalitos San Antonio TX 78204.15 New systems, repairs, renewals and registration of existing unpermitted systems have separate permit categories.6 Bexar County inspects septic installations at various points during installation.16

Standard systems renew every 5 years with tank pumping, a pump receipt and a $30 renewal fee.615 Aerobic systems have an initial 2-year permit, followed by a service contract and quarterly maintenance reports.615 We could not confirm a general Olmos Park public-sewer connection rule or permission for alternative off-grid sanitation; ask the Building Department and Environmental Services before committing to a wastewater design.1215

Building a home in Olmos Park: what are the steps?

  1. Confirm the zoning district and discuss the proposed use, building layout and accessory structures with the Olmos Park Building Department.512
  2. Prepare the property survey or plat: Olmos Park requires one before issuing a building permit for new construction and listed projects including additions, garages, pools and fences.17
  3. Submit the building plans and confirm the required building and trade permits with the city Building Department; use the controlling March 2026 fee schedule for fees.1211
  4. If using septic, obtain the applicable Bexar County OSSF approval and arrange installation inspections with Environmental Services.616
  5. Obtain the city building permit before starting work, and keep permitted work accessible and exposed until the Building Official approves inspection.117

Before planning a move-in date, ask the Building Official when a Certificate of Occupancy is required; we could not confirm the city’s issuance triggers.12

Watch-outs

  • Olmos Park’s owner-builder exemption concerns the general-contractor surety bond; homeowners still need required city building permits.71
  • RV parking in Olmos Park’s Single-Family Residence and Apartment Districts does not allow dwelling or sleeping in the unit.4
  • For Olmos Park construction near the floodplain, Bexar County Public Works reviews development and may require an engineered flood study and floodplain development permit.18
  • We could not confirm private-well requirements or a minimum dwelling size in Olmos Park; ask the city Building Department before relying on either in a purchase plan.12

Sources

  1. Permits (Olmos Park), quoted and re-checked
  2. Sec. 40-40. Building and land use restrictions (Olmos Park), quoted and re-checked
  3. On-Site Sewage Facilities (Olmos Park), quoted and re-checked
  4. Sec. 24-176. Storage or parking of trailers, camping units, motor homes, boats, or portable machinery (Olmos Park), quoted and re-checked
  5. Sec. 40-40. Building and land use restrictions (Olmos Park), quoted and re-checked
  6. On-Site Sewage Facilities (Olmos Park), quoted and re-checked
  7. Permits (Olmos Park), quoted and re-checked
  8. Sec. 40-40. Building and land use restrictions (Olmos Park), quoted and re-checked
  9. Sec. 40-40. Building and land use restrictions (Olmos Park), quoted and re-checked
  10. Permits (Olmos Park), quoted and re-checked
  11. Olmos Park Fee Schedule (Olmos Park), quoted and re-checked
  12. Olmos Park Building Department (olmospark.org)
  13. FAQs - Residential Certificate of Occupancy, quoted and re-checked
  14. Sec. 40-45. Impervious cover (Olmos Park), quoted and re-checked
  15. Bexar County Environmental Services (bexar.org)
  16. On-Site Sewage Facilities (Olmos Park), quoted and re-checked
  17. Olmos Park Building Official — permit requirements (olmospark.org)
  18. Floodplain Development Permits (Olmos Park), quoted and re-checked

Written October 11, 2026 from the rules quoted below, each taken from an official source and re-checked by an independent reviewer. This is research, not legal advice: rules change, so confirm with the office before you buy or build.

Answers from the rulebook for Olmos Park

Olmos Park’s own rules

  • Building permitRequired

    Buildings and structures inside Olmos Park city limits.

    • Exceptions are identified by the city through section 105.2 of the 2018 International Building Code and International Residential Code, with city-listed exceptions for fences, swimming pools, and certain front-yard impervious surfaces.
    • Work started before obtaining a permit is charged a double fee.
    “No building or structure shall be erected, constructed, enlarged, altered, repaired, moved, improved, removed, converted, or demolished unless a building permit has first been obtained from the City of Olmos Park Building Official.”
  • Owner-builder exemptionConditional

    Homeowners improving their own property inside Olmos Park city limits.

    • The exemption concerns the $5,000 general-contractor surety bond, not the building-permit requirement.
    • The property must not be rental or lease property; rental or lease property requires the $5,000 bond.

    general contractor surety bond: 5000 USD (homeowners improving their own property and accomplishing the work themselves or acting as their own contractor may be exempt)

    “Home owners improving their own property and accomplishing the work themselves or acting as their own contractor can be exempt from posting a surety bond, unless the property is rental/lease property then a $5,000 surety bond will be required.”
  • Building code adoptedAdopted (with conditions)

    Construction and development inside Olmos Park city limits.

    • Industrialized structures must also comply with mandatory Texas Department of Licensing and Regulation codes under 16 TAC sections 70.100 and 70.101.
    “All work must comply with the standards as set forth in the latest addition of the International Code Council adopted by the City.”
  • Local zoningPresent

    Land inside Olmos Park city limits; the city code contains and administers zoning districts.

    “Zoning regulations and districts as herein set forth are approved and established. The City of Olmos Park is hereby divided into districts, of which there shall be seven”
  • Zoning districtsPublished

    Olmos Park zoning districts, including Single-Family Residence Districts and Apartment Districts; single-family subdistricts SD-1 through SD-4 are published in Table 40-44.1.

    • The city website links to an Olmos Park zoning map and the code publishes district-specific rules.
    “The City of Olmos Park is hereby divided into districts, of which there shall be seven, known as:”
  • Living in an RVLimited

    Use of trailers, camping units, and motor homes for occupancy in Olmos Park Single-Family Residence and Apartment Districts.

    • Parking/storage is regulated separately.
    • A resident may park such units in front or side yards for 48 hours before and after a trip for preparing, loading, and unloading.
    • Guests may park in the front or side yard for no more than three days during a calendar month unless the police department grants a day-by-day extension.
    • Use for dwelling, sleeping, business, or entertainment is prohibited.

    maximum front/side motor-home length: <= 24 feet (driveway parking) · maximum front/side motor-home height: <= 9 feet (driveway parking)

    “It shall be unlawful to use the same for dwelling, sleeping, business or entertainment purposes, or to connect same to sanitary sewer facilities.”
  • Who permits septicCounty (with conditions)

    Septic systems located inside Olmos Park city limits; Bexar County administers OSSF permitting and inspection for systems within the county.

    • The reviewed county page states the countywide OSSF requirement; it does not identify a municipal exception for Olmos Park.
    “Bexar County requires that all on‐site sewage facilities within Bexar County have to be permitted.”
  • Septic permitRequired

    On-site sewage facilities inside Olmos Park city limits.

    • New, repair, renewal, and existing-system registration permits are separately identified by Bexar County.
    • Standard systems renew every five years with pumping, a pump receipt, and a $30 renewal fee.
    • Aerobic systems have an initial two-year permit and then require a service contract and quarterly maintenance reports.

    standard-system renewal fee: 30 USD (renewal every five years)

    “There are four (4) instances when a permit is required:”
  • Septic inspectionRequired

    Installation of septic tanks inside Olmos Park city limits.

    • Bexar County inspects installations at various points during installation.
    “All installations of septic tanks are inspected at various points during the installation.”
  • Permit feesPublished (with conditions)

    City permits and services inside Olmos Park city limits.

    • The fee schedule is approved March 18, 2026 and supersedes conflicting city-code or city-form fee provisions.
    • Building permit fees vary by project square footage and trade.

    plan checking fee: 30.7 USD per page · inspection fee: 75 USD · certificate of occupancy: 200 USD · private water well: 100 USD

    “This fee schedule, and in particular the fees set forth herein, controls over and supersedes any conflicting provisions in the city code or on city forms.”

Rules another office applies inside Olmos Park

Olmos Park does not set these itself; the county, a health district or the state does, and they apply to every address inside its limits.

  • SetbacksSpecified

    Detached accessory buildings in the Single-Family Residence Districts inside Olmos Park city limits.

    • Detached accessory buildings must be at least 10 feet from the main structure, 60 feet from the front property line, and 3 feet from rear or side property lines, except as specifically allowed in section 40-48.
    • Attached accessory buildings are treated as part of the main structure and follow the main-structure setbacks.
    • A corner-lot side yard abutting a street has a 25-foot curb-line restriction for certain vehicle-storage structures.

    detached accessory building distance from main structure: >= 10 feet (section 40-48) · detached accessory building front setback: >= 60 feet (section 40-48) · detached accessory building rear/side setback: >= 3 feet (section 40-48)

    “A detached accessory building shall be located not less than ten feet from the main structure, not less than 60 feet from the front property line and not less than three feet from any rear or side property line, except as specifically allowed in section 40-48.”
  • Lot coverageSpecified

    Single-family Residence District lots inside Olmos Park city limits, for front-yard impervious cover.

    • The limit applies to the aggregate impervious cover within the defined front-yard area.

    maximum front-yard impervious cover: <= 50 percent

    “All impervious cover shall not cover in the aggregate more than 50 percent of the front yard area of a lot, tract, parcel, or development as defined above.”
  • Building heightSpecified

    Accessory buildings in the Single-Family Residence Districts inside Olmos Park city limits.

    • The measurement is from the lowest ground level of the accessory building to the roof peak.
    • The restriction applies considering only the accessory building and its location on the lot.

    maximum accessory-building height: <= 25 feet

    “Considering only the accessory building in question and only its location on the lot, an accessory building can have only a single or two stories with no more than a maximum height of 25 feet measured from the lowest ground level of the accessory building in question to the peak of the roof of the accessory building in question.”
  • Building in a floodplainRequired

    Construction activities inside Olmos Park city limits on property in proximity to the 100-year floodplain; Bexar County Public Works administers the review.

    • A professional-engineer flood study may be required.
    • The application requires supporting material and a $50 fee per activity.
    • The source does not state that every Olmos Park parcel is subject to the permit; applicability depends on proximity to the 100-year floodplain.

    floodplain permit fee: 50 USD per activity

    “To verify that development does not have a negative impact on areas with a 1% annual chance of flooding (100 - Year Floodplain), Bexar County Public Works must review all construction activities conducted on property that is in proximity to the 100-- Year Floodplain.”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission; ask Olmos Park or Bexar County directly.

  • Certificate of occupancy — Occupancy of buildings inside Olmos Park city limits.
  • Minimum dwelling size — Dwellings inside Olmos Park city limits.
  • Tiny homes — Tiny-home occupancy inside Olmos Park city limits.
  • Manufactured homes — Manufactured-home occupancy inside Olmos Park city limits.
  • Accessory dwellings — Accessory dwelling units inside Olmos Park city limits.
7 more unanswered
  • Off-grid sanitation
  • Well permit
  • Mandatory utility hookup
  • Agricultural exemption
  • Subdividing land
  • Driveway access
  • Short-term rentals

Each answer was extracted from an official source and independently re-checked against that source by a second reviewer. That is an evidence check, not legal advice. Rules change; confirm with the authority before you buy or build.

Unanswered questions are usually a sign that Olmos Park publishes no rule on the point, not that none exists. Bexar County’s page lists the county offices to call.

← All of Bexar County: county rules, score and offices