City of Austin construction details are the numbered standard drawings the city publishes to show exactly how roads, sidewalks, drainage, sewers, water lines, and site controls must be built. They are paired with written standard specifications that describe materials and methods, and both sit under a set of technical criteria manuals that govern design. All of it is hosted on the Municode Library, and using the current official version is the difference between a clean plan review and a rejected submittal.
The Numbered Detail Series
Austin’s Public Works Department organizes its standard details into numbered series, each covering a distinct category of infrastructure work. Engineers reference specific detail numbers directly on their construction plans, and inspectors check the built work against those same drawings.
- Series 100, Earthwork. Soil excavation, fill placement, and compaction standards for the foundation beneath everything else.
- Series 200, Subgrade and Base. Preparation of the layer directly beneath pavement or structures. Item No. 201S, for example, requires the subgrade to be bladed and rolled to a uniform texture across the full area before paving begins.
- Series 300, Street Surface Courses. Asphalt and surface treatments, including layer thickness and material composition.
- Series 400, Concrete Structures. Reinforced concrete for driveways, sidewalks, curbs, retaining walls, and miscellaneous structural elements.
- Series 500, Pipe and Appurtenances. Storm and sanitary sewer pipe installations, manhole dimensions, frames, grates, and covers. Item 503S covers manhole rings and covers; 506S covers manhole construction, including drop inlets and precast foundations.
- Series 600, Environmental Enhancement. Erosion control such as silt fences, sodding, and seeding to protect waterways during construction.
- Series 700, Incidental Construction. Miscellaneous items that don’t fit other categories, like fencing and guardrails.
- Series 800, Urban Transportation. Traffic control devices, signage, pavement markings, and steel plating for temporary roadway protection.
These series are maintained by Public Works and referenced in the contract documents for city-funded projects.1City of Austin. IFB 6100 CLMC737 Technical Specifications2Municode Library. Austin Standard Specifications Manual – Item No. 201S Subgrade Preparation
Austin Water Has Its Own Details
Water and wastewater work is not in the Public Works series. Austin Water maintains a separate 1100S series for water main and reclaimed water main construction, including pavement repair and casting adjustments around utility installations. The 500 series still applies to shared items like manhole rings, covers, and manhole construction for both storm and sanitary sewer.3Municode Library. Austin Utilities Criteria Manual1City of Austin. IFB 6100 CLMC737 Technical Specifications Utility plans for new residential or commercial developments must incorporate the Austin Water details to receive approval.
Details vs. Specifications: Two Different Documents
The standard details are drawings. They show configuration, dimensions, and material placement. The standard specifications are the written procedures that go with them, and each specification carries its own item number that gets referenced in contract documents alongside the detail number.
Item No. 403S is a useful example. It governs concrete used in structures, setting acceptable water-to-cement ratios, required compressive strength, and the laboratory testing that must happen before the concrete is placed and again after it cures. Inspectors reject work that doesn’t meet the spec even if it looks fine visually. The specifications also govern curing times, soil density tests, and compaction methods, because a pour or a fill that seems adequate at installation can fail months later if the underlying chemistry or density isn’t right.
You need both documents open when you build. The detail tells you what it looks like; the specification tells you what it’s made of and how it goes in.
The Criteria Manuals That Sit Above the Details
Before any detail gets picked, design decisions have to line up with Austin’s Technical Criteria Manuals. The city maintains eight of them, which interpret and implement the Land Development Code.4AustinTexas.gov. Codes, Resources, Tools Four drive most construction work.
Transportation Criteria Manual
The TCM governs street design, traffic control, and pedestrian accessibility. It was adopted in 2022 with input from accessibility specialists to comply with federal Public Right-of-Way Accessibility Guidelines and Texas Accessibility Standards.5AustinTexas.gov. Transportation Criteria Manual Interim Standard Details The most recent update, Supplement 4, was published in March 2026.6Municode Library. Austin Transportation Criteria Manual New roads, street modifications, and pedestrian facilities all trace back to it for lane widths, signal placement, crosswalk design, and multimodal access.
Utilities Criteria Manual
The UCM governs the design and coordination of water, wastewater, and reclaimed water facilities.7Austin Water. Construction Standards It’s the source for easement widths, clearance zones, and connection requirements. Easements must be at least 15 feet wide, or twice the depth of the buried infrastructure, whichever is greater. A minimum horizontal separation of 5 feet is required between Austin Water infrastructure and any other utility. Vertical separation runs 12 to 18 inches depending on whether the water or sewer main sits above or below the other utility. New water mains are limited to specific pipe sizes: 4-inch, 6-inch (fire hydrant leads only), 8-inch, 12-inch, 16-inch, 24-inch, 30-inch, 36-inch, and 42-inch, with anything larger requiring case-by-case approval.8Municode Library. Austin Utilities Criteria Manual – Section 2.9.1 General Criteria
Environmental Criteria Manual
The ECM covers water quality protection, erosion and sedimentation control, and environmental compliance during construction. Projects in the Barton Springs Zone face heightened requirements, including a sealed water quality control plan prepared by a registered professional engineer and an on-site Environmental Project Manager present more than 90 percent of the time during active construction.9Municode Library. Austin Environmental Criteria Manual – Section 1.2.0 Administrative
Drainage Criteria Manual
The DCM sets how stormwater runoff is calculated, captured, and controlled. Projects that add impervious cover like parking lots, rooftops, and driveways typically must include detention or other mitigation. The Watershed Protection Department reviews drainage plans and enforces requirements including connection to existing storm drain systems within 550 feet of a development and two-year flood detention controls.10AustinTexas.gov. Regional Stormwater Management Program Resources
The remaining four manuals (Building, Fire Protection, Standards Specification, and Standards) round out the framework and are updated through the city’s formal rule posting process.4AustinTexas.gov. Codes, Resources, Tools
Where to Download the Current Documents
Austin hosts its construction standards through the Municode Library. The Current Standard Details (drawings) and the Current Standard Specifications (written procedures) live at separate Municode portals, and the criteria manuals are hosted the same way with full-text search.7Austin Water. Construction Standards
PDF versions handle quick reference and printed permit applications. Engineers and architects working in drafting software typically need CAD or DWG files to drop details straight into construction plans. Using the official Municode-hosted versions matters, because Austin updates these documents through a formal rule posting process. Working from an outdated copy pulled off a third-party site is a reliable way to fail plan review.
The criteria manuals see regular supplements. The Transportation Criteria Manual is on Supplement 4 as of March 2026, and the Utilities Criteria Manual was updated through Rule No. R161-25.16 in September 2025.3Municode Library. Austin Utilities Criteria Manual Bookmark the official portals rather than downloading static copies.
How the Details Get Enforced
Construction documents only matter if someone enforces them. In Austin that happens at two stages.
Plan Review Before You Build
The Development Services Department reviews submitted plans for compliance with applicable codes and criteria manuals. Residential plans move through zoning, arborist, building, and fire reviewers. Commercial plans face a wider set: building, mechanical, electrical, plumbing, structural, fire, health, and industrial waste. Some projects also need review from partner departments like Austin Water (tap permits), the Watershed Protection Department (floodplain review), or the Historic Preservation Office.11AustinTexas.gov. Expedited Building Plan Review Partner reviews run on their own timelines, which can push total permit issuance past the initial 10 business day completeness check.
Inspections During Construction
Once a permit is active, the Building Inspection Division checks work at each stage. Inspections aren’t automatic. The permit holder schedules each one, and a paper copy of the city-approved plan set must be on-site whenever the inspector arrives. Missing plans can fail an inspection by itself, regardless of the work quality.12AustinTexas.gov. Building Inspections Every deficiency has to be corrected before a re-inspection can be scheduled, and the final building inspection must clear before the city issues a Temporary Certificate of Occupancy or Certificate of Occupancy.
If you’re preparing plans, pull the current detail and specification numbers from Municode, confirm your design against the applicable criteria manual, and keep the approved plan set on-site once construction begins. That sequence is what the city is checking for at every step.