Top TLDR:

Austin STR occupancy limits cap short-term rental properties at 6 unrelated adults or a maximum of 10 related guests, with a bedroom-based formula of 2 guests per bedroom plus 2 applied under stricter enforcement from July 1, 2026. These Austin STR occupancy limits also include a 6-adult outdoor assembly cap, a full ban on events like weddings and parties after 10 PM, and noise thresholds of 75 dB daytime and zero audibility at the property line after 10 PM. Set your listing's guest maximum to the correct formula-derived number and post the required information packet inside your property before accepting any bookings.

Of all the compliance requirements Austin places on short-term rental operators, occupancy limits are among the most frequently misunderstood — and among the most actively enforced. Many hosts set their maximum guest count based on beds and floor space without realizing the City of Austin has its own specific formula, its own definitions, and hard limits on what can happen inside and outside the property regardless of how many guests are present.

Getting this wrong doesn't just risk a complaint. It puts your license at risk. Violations carry fines of up to $500 per day per offense, and repeated issues can result in license revocation. Understanding Austin's STR occupancy limits — precisely, not approximately — is a foundational part of operating a legally compliant rental.

This guide lays out every occupancy-related rule in detail: the guest cap, the bedroom-based formula, the "unrelated adults" definition, event restrictions, noise thresholds, and the safety and posting requirements that complete the compliance picture. For the broader licensing and regulatory context, our guide to Austin short-term rental regulations covers everything that wraps around these rules.

The Two Core Guest Cap Rules

Austin applies two parallel occupancy limits to short-term rentals, and both are active simultaneously. Your property must comply with whichever rule is more restrictive in a given situation.

Rule 1: The unrelated adults capNo more than 6 unrelated adults may occupy a single-family dwelling at any one time. If all guests are related — connected by blood, marriage, domestic partnership, or adoption — the cap rises to 10 individuals. The City's definition of "unrelated" is specific: anyone not connected by consanguinity, marriage, domestic partnership, or adoption is counted as an unrelated adult for this purpose.

Rule 2: The bedroom-based formulaThe formula is 2 guests per bedroom, plus 2 additional guests, with an absolute ceiling of 10 total occupants per unit. From July 1, 2026, the City is applying stricter enforcement of this formula — meaning your listing configuration, your house rules, and any guest communications should reflect the formula-derived number, not just the 6-unrelated-adults baseline.

In practice, the formula and the cap interact like this:

BedroomsFormula resultEffective max (unrelated adults)1 bedroom4 guests4 (formula more restrictive)2 bedrooms6 guests63 bedrooms8 guests6 (unrelated adult cap applies)4 bedrooms10 guests6 (unrelated adult cap applies)5+ bedrooms12+ formula result6 unrelated or 10 related (hard cap)

The takeaway: for most Austin STRs with unrelated guests, the 6-adult cap is the binding constraint regardless of bedroom count. The bedroom formula primarily matters for families and groups of related guests, where it determines the actual maximum under the 10-person ceiling.

What "Unrelated Adults" Actually Means

The distinction between related and unrelated guests matters more than most hosts realize — not just for setting maximum occupancy, but for how you configure your listing on platforms like Airbnb and Vrbo.

Austin City Code defines "unrelated" as anyone not connected to other guests by consanguinity (blood relation), marriage, domestic partnership, or adoption. A group of college friends traveling together? Unrelated adults — cap of 6. A family of 8 including grandparents, parents, and children? Related — cap of 10, subject to the bedroom formula.

The problem for hosts: you generally don't know in advance whether your incoming guest group is related or not. The practical approach is to set your listing's maximum occupancy at the unrelated cap (6 adults) for standard operations, and include language in your house rules clarifying the related-guest exception for guests who believe they qualify. Guests who attempt to check in with more than the listed maximum — even claiming relation — create enforcement risk if not properly documented.

Outside Assembly Rules: The 6-Adult Outdoor Limit

Occupancy limits don't stop at the front door. Austin also restricts outdoor gatherings at STRs, and the threshold is notably lower than the indoor cap.

No outside assembly of more than 6 adults is permitted between 7:00 AM and 10:00 PM. Outside this window — between 10:00 PM and 7:00 AM — outdoor gatherings are not permitted at all.

This rule matters for properties with large yards, pool decks, or outdoor entertainment spaces, especially those marketed for group stays or event-adjacent travel. A backyard barbecue with 8 guests spills over the outdoor assembly limit even if all 8 are within the indoor occupancy cap.

Your house rules should address outdoor guest limits explicitly, and your property's physical layout should make the 6-adult outdoor limit easy to enforce during check-in orientation.

Event and Assembly Restrictions: What's Explicitly Prohibited

Austin City Code includes a specific and enumerated list of activities that constitute an "assembly" for regulatory purposes. An STR cannot be used for an assembly between 10:00 PM and 7:00 AM. The code defines assembly to include:

• Weddings
• Bachelor or bachelorette parties
• Concerts or live performances
• Sponsored events
• Any similar group activity other than sleeping

This restriction applies regardless of whether the event is paid or private, and regardless of how many guests are present. A group of 5 guests hosting a bachelorette party at 11 PM is in violation even though they're under the occupancy cap. The activity type — not just the headcount — is what triggers the rule.

Many Austin STR operators unknowingly attract event-adjacent bookings without realizing the exposure this creates. Clearly communicating these restrictions at booking, during the confirmation process, and in posted house rules is the most effective way to prevent violations before they occur. At Sora Stays, screening for event-intent bookings is a standard part of our guest vetting process — it protects both the property and the license.

Noise Rules: The Specific Numbers

Austin's noise ordinance for STRs is objective and enforceable — which makes it one of the most complaint-driven compliance areas in the city. There are three specific thresholds that apply:

Amplified sound during daytime hours (10:00 AM to 10:00 PM):Must not exceed 75 decibels at the property line. This covers outdoor speakers, sound systems, and any amplified entertainment equipment.

Amplified sound during evening and overnight hours (10:00 PM to 10:00 AM):Must not be audible beyond the property line. The standard tightens significantly after 10 PM — the question shifts from a decibel threshold to zero audibility at the boundary.

General unreasonable noise:Prohibited between 10:30 PM and 7:00 AM under Austin's broader noise ordinance.

For practical operations, these rules mean that outdoor speakers, Bluetooth systems, and any sound equipment should be governed by house rules that mirror these thresholds. A neighbor who can hear music from your STR at 11 PM has grounds for a complaint — and a complaint that results in a code enforcement visit can escalate quickly if the property has any prior violations on record.

The Required Information Packet: What Must Be Posted Inside

Austin City Code requires every licensed STR to display a physical information packet in a conspicuous common area of the property. This isn't a recommendation — it's a licensing obligation. The packet must include:

• Name and contact information of the local contact designated on the STR application
• Emergency contact and procedures
• Applicable house rules, including occupancy limits, quiet hours, and the outdoor assembly restriction
• Local contact's availability and two-hour response commitment

This document serves a dual purpose: it keeps guests informed of the rules, and it creates a documented record that the operator provided notice of the requirements. If a complaint results in a code enforcement visit, the posted information packet is evidence of good-faith compliance.

Keep the packet current. If your local contact changes, the packet must be updated to reflect the new contact information — and you're required to notify the City in writing within three business days of any local contact change.

Safety Requirements That Protect Guests and Your License

Occupancy compliance doesn't exist in isolation — it sits alongside a set of mandatory safety standards that every Austin STR must meet. These are verified during the licensing process and are expected to be maintained throughout the license period:

• Working smoke detectors in each sleeping area and hallway
• Working carbon monoxide detectors
• At least one accessible fire extinguisher
• Clearly marked and unobstructed emergency exit routes

These are not features you install once and forget. Each licensing cycle is an opportunity for review, and any guest complaint that triggers an inspection will include a safety equipment check. Keeping a maintenance log that documents the condition of safety equipment protects you in the event of any dispute.

How Violations Are Enforced

The City of Austin enforces STR occupancy and nuisance rules through its Code Compliance division. Enforcement is triggered by:

• Neighbor complaints (the most common trigger)
• Guest complaints
• Platform monitoring cross-referenced against licensed properties
• Random code compliance inspections

Each day that a violation continues is treated as a separate offense. At up to $500 per day per violation, a week of non-compliance can generate thousands of dollars in fines before a hearing is even scheduled. Repeat or serious violations — including events, persistent noise complaints, and overcrowding — can result in license revocation, which makes obtaining a future license significantly more difficult.

The July 1, 2026 enforcement expansion means platforms will now be aligned with the City's compliance infrastructure, creating a tighter feedback loop between listed properties and license status. Operators who ignore occupancy and behavior rules face a more connected enforcement environment than at any previous point in Austin's STR history.

Building Compliance Into Your Listing and Guest Experience

The most effective way to manage Austin's STR occupancy limits and guest cap regulations is to build them into your operations proactively — not reactively after a complaint.

Set your platform listing to accurately reflect the 6-adult maximum for unrelated guests, and include the related-guest exception in your house rules with clear language about how to document eligibility. Add the outdoor assembly cap, quiet hours, and event prohibition to your booking confirmation message so guests receive the information before they arrive, not when they check in.

The physical information packet should be the first thing guests see when they walk in, not a document buried under welcome guides and local recommendations.

For property owners managing these details across multiple Austin properties — or across the broader area including Cedar Park, Leander, Round Rock, Georgetown, and the Hill Country — this level of operational consistency is difficult to maintain without systems in place. Our full-service Austin property management includes house rules enforcement, guest screening, and complaint response as core parts of the management service, so occupancy compliance is built into every stay from the start.

For investors evaluating how compliance costs and operational requirements affect Austin STR returns, our Complete Guide to Austin's Vacation Rental Market covers performance benchmarks alongside the regulatory landscape that shapes them.

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Bottom TLDR:

Austin STR occupancy limits are enforceable rules with $500-per-day-per-violation fines — not suggestions — and every host must understand the 6-unrelated-adult cap, the 2-per-bedroom-plus-2 formula, the 6-adult outdoor limit, and the complete ban on assemblies like parties and events between 10 PM and 7 AM. Noise rules add a specific 75 dB daytime threshold and zero-audibility standard after 10 PM. Build these Austin STR occupancy limits directly into your listing configuration, house rules, and guest communication to prevent complaints and protect your operating license.

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