I'm not naming the developer because the story is more useful than the name. The numbers are real. The project was a 14-unit small-lot single-family subdivision on 2.4 acres in South Austin, just outside the Bouldin Creek neighborhood. The acquisition was 2024. The plan was to permit in spring 2025 and start construction by late summer.
By the time I got involved in late summer 2025, the project was already $94,000 in the hole on un-recoverable consultant fees, redesign costs, and a full season of carrying-cost interest. The cause was two trees.
The Austin tree-preservation ordinance
Austin's Land Development Code (Title 25, Chapter 25-8, Subchapter B) regulates the protection, removal, and replacement of trees within the city. The ordinance has three tiers:
- Protected trees (19-23 inches in diameter at breast height): require a permit to remove and a 2:1 replacement.
- Heritage trees (24+ inches DBH for most species; smaller for select species like American Elm or Bur Oak): require a permit, neighborhood notification, and full mitigation. Removal is rare and expensive.
- All trees: factored into impervious-cover calculations and site-design decisions.
The two trees on the South Austin parcel were heritage pecans. One was 31 inches DBH. The other was 27 inches. Both were healthy.
What went wrong, in order
Spring 2024: The developer purchased the parcel. Their broker did not order a tree survey. Standard land surveys for property boundaries don't capture tree species, sizes, or locations.
Summer 2024: The developer's first design firm produced a schematic 14-unit layout. The pecans were drawn as generic vegetation on the survey. No size noted.
Fall 2024: Entitlement application went in. Austin Development Services (now part of the Watershed Protection Department's site review) flagged the schematic for tree-protection review. They require a certified arborist's tree survey before they can approve site plans for sites with trees over 8 inches DBH. The survey came back: two heritage pecans. The site plan as drawn would require removing both.
Heritage-tree removal in Austin requires (a) a hardship determination, (b) neighborhood notification with 30-day comment period, and (c) full mitigation — typically requires planting replacement caliper inches at 1:1 ratio, plus paying into the Urban Forestry Replenishment Fund at $300-$650 per inch of DBH removed. For two heritage pecans (58 inches combined), that's between $17,400 and $37,700 just in fund payments, before any replacement-tree planting cost.
And the hardship determination wasn't a slam-dunk. Austin DSD requires the applicant to demonstrate the property can't be developed economically without removing the heritage tree(s). On a 2.4-acre site that could fit 12 units instead of 14 by working around the trees, the hardship case was weak.
Winter 2024-25: The site plan was redesigned. Three units removed; site geometry rotated to preserve a 30-foot critical-root-zone radius around each pecan. The developer paid the design firm an additional $32,000 for the redesign. Lost three units of saleable inventory at $35,000 estimated profit each ($105,000 in foregone profit, partly offset by reduced construction cost). Lost a building season.
Spring 2025: The redesigned plan was resubmitted. It cleared site review on the second pass. Building permits issued in summer 2025. Construction started fall 2025 — 12 months after the original target.
Total un-recoverable cost the developer assigned to the late tree survey: $94,000 in consultant fees, carrying interest, opportunity cost on the lost units, and design firm change orders. Their accountant pulled the number; I''ve seen the breakdown.
The fix is one survey, done in week one
A certified arborist tree survey for a 2.4-acre site costs $1,800-$2,400. It identifies every tree on site over 8 inches DBH, by species, size, and condition. Most arborists deliver in 10-14 days from order.
Done in the first month of due diligence — before the design firm starts schematic — the survey would have flagged both heritage pecans. The developer would have either:
- Designed around them from the start (12-unit layout, no redesign penalty), or
- Walked from the deal during due diligence and put their capital into a different parcel.
Either decision saves $94,000.
What we tell Austin clients now
On any Austin project — single-family, multifamily, commercial — we ask for the tree survey on the kickoff call. If the buyer hasn't ordered one, we recommend ordering one before any design work begins. We work with two arborist firms in Austin who turn around survey reports in under two weeks.
We also pull the impervious-cover calculation on day one (Austin's LDC limits impervious cover by zoning district), check critical-environmental-features (CEFs) overlay, and verify the parcel's creek-buffer setback if applicable. Austin's site-development requirements are layered enough that any one of them can blow up a project that started without checking. Tree preservation is the most expensive of the three when missed.
Austin tree preservation is famously strict. The fix isn't fighting it — it's pricing it correctly into your underwriting. Order the arborist survey in week one. The $1,800 saves $94,000.
If you're under contract on an Austin parcel and haven't ordered a tree survey, do it before the next design milestone. The story above is the version where this lesson cost six figures. The version where it doesn't is one PDF and a two-week wait.