Price the site before you design the house.

A new build can match your needs, but land, permitting, sitework and service availability create costs and timing beyond the house itself. Compare a custom path with existing homes using the same all-in budget and move-date assumptions.

Austin Tech Relocation editorial guide8 minute guidePrepared October 26, 2026

Compare the full decision, not only the floor plan.

For an existing home, review condition, inspection results, permitted alterations, immediate repairs and likely operating costs. For a build, include land, design and engineering, surveys, geotechnical work, site preparation, utility extensions, permitting, builder scope, allowances, contingency, temporary housing and construction financing. Request comparable written scopes and ask professionals to identify exclusions.

Find out which government controls the parcel.

Before buying land or assuming an existing improvement can be repeated, confirm the city limits, extraterritorial jurisdiction, county and any special district. Austin Development Services provides a residential permit guide and plan review process for applicable City work. Travis County states that new single-family homes in unincorporated county areas require county permits. Rules can vary by jurisdiction and project; contact the authority with the legal description and proposed scope.

Investigate the site before committing to a design.

Commission the appropriate survey and professional reviews for slope, drainage, floodplain, soils, trees, access, easements, retaining walls and utility availability. City and county codes can restrict work on steep slopes, flood-prone land or other sensitive areas. A listing statement such as “buildable” is not a permit, engineering opinion or guarantee that a preferred design can be approved.

Check water, wastewater and access early.

Request written service availability from utilities and identify whether the property uses a septic system, well, private road or shared access. Travis County’s OSSF process calls for parcel, site-plan, slope, easement and floodplain information. Confirm current application requirements directly; an expired or preliminary application is not approval to construct.

Set a decision checkpoint before the offer or deposit.

Ask the local planning authority, surveyor, engineer, architect, builder and lender which investigations must be completed before a purchase or design commitment. Put key approvals, contingency assumptions and exit dates in writing with your real estate and legal professionals. This guide does not promise approval, cost, resale value or construction timing.

SOURCES & FURTHER READING

Austin residential building permit guide ↗Austin residential plan review ↗Austin development code and tools ↗Travis County development services ↗Travis County septic permit information ↗Travis County floodplain maps ↗FEMA Flood Map Service Center ↗

Questions people ask.

How long does it take to build a home in Austin?

There is no dependable universal duration. Land review, jurisdiction, design, site constraints, permits, utility connections, construction scope and contractor schedule all affect timing. Get a written, project-specific schedule before setting a move date.

Can I build on a steep or hillside lot?

A listing statement cannot establish that. Verify jurisdiction and applicable slope, drainage, flood, tree, utility and development requirements with the permitting authority and qualified design professionals before purchase.

Is a custom build cheaper than buying an existing home?

Not necessarily. Compare land, surveys, design, engineering, sitework, permits, utility connections, financing, temporary housing, contingency and ongoing costs against an inspected existing property.

Is building a custom home better than buying an existing one?

It depends on your move deadline, site risk, budget flexibility, design priorities and tolerance for project management. Compare the same all-in cost categories, including land and temporary housing, and use a written, project-specific schedule rather than a general build-duration estimate.