Tight Lot & Legacy Tree Excavation in Austin & Central Texas
City of Austin tree rules built into the plan
This is foundation, pool, trench and ADU digging on urban lots with narrow access or protected trees, in Austin and Central Texas. A foundation dig runs $15,000–$28,000 per structure before tree and access work, and the site walk sets the rest. We flag root zones before a machine arrives. Most jobs start 1–3 weeks after approval.
Tight Access and
Protected Trees
Often Happen Together.
The Lot Is Too Tight for a Standard Machine
Central Austin infill lots were platted long before anyone planned for excavators. Zero-lot-line setbacks, narrow side yards, shared driveways and structures on several sides rule out full-size machines on many urban lots.
We plan a compact equipment path, a spoil staging spot and a sequence that works, then quote it. If the access truly won't fit a machine, we tell you before you spend time on us.
The Tree Is Protected and the Dig Still Has to Happen
Inside Austin city limits, trees 19 inches and larger are protected. The critical root zone is one foot of radius per inch of trunk diameter. On a mature oak the root zone can reach 20 feet or more from the trunk.
Damage to a protected tree can kill it, stop your project and bring City penalties and mitigation. We flag the boundaries and plan the dig around them before the first pass.
Know the Rules
Before You Dig.
Inspectors check for tree protection on Austin residential builds. Penalties and mitigation are set by the City of Austin, and we don't put a number on them. They depend on the tree and the case.
| Tree | Size | Rule |
|---|---|---|
| Protected tree | 19" or more, any species | Protected inside Austin city limits |
| Heritage tree | 24" or more, listed species | Higher level of protection |
| Heritage tree removal | 30" or more | Needs a variance under LDC 25-8-641 |
Diameter is measured at 4.5 feet above grade. The City keeps the list of heritage species. Rules: City of Austin, Trees on Residential Property and Environmental Criteria Manual, Section 3. The City rules apply inside Austin. Other cities and counties have their own, and we check before we quote.
Full tree rules: selective clearing and heritage tree preservation. Last reviewed: September 2026.
Constrained Sites Need
A Different Approach.
Root Zone Flagging + Documentation
Before equipment enters, we measure trunk diameter, calculate each root zone radius and flag it, then photograph it. Your GC, arborist and inspector see the same boundary.
Compact Equipment Access Planning
We walk the access route before mobilizing: gate widths, overhead clearance, ground surface and turn radius at the dig. Equipment is chosen after the walk.
Hand Digging at Sensitive Boundaries
When work has to happen inside or beside a root zone, and your arborist has signed off, we hand dig at the boundary. If your arborist specifies air excavation, we coordinate it.
Spoil Management on Constrained Sites
You can't pile spoil beside the dig on a tight lot, and a pile in a root zone counts as disturbance. We plan staging and haul routing before we break ground and haul the material before we leave.
Machines Sized
to the Access.
We choose the machine after the site walk, so it matches the access. Dozers, larger excavators and compaction equipment are rented locally when a job needs them.
CAT 305.5E2 Mini Excavator
Our smallest digging machine, with a hydraulic hammer for rock in confined spaces. Gate width and turn radius are checked on the site walk.
CAT 299D3 XE Compact Track Loader
Moves spoil and material on the lot, and its tracks are easier on soft ground than wheels. It works alongside the mini excavator when there is room.
Hand Digging
For root-sensitive work inside arborist-approved boundaries. It is slower and costs more, and it is how we reduce the risk of damaging roots.
Site Walk to
Clean Handoff.
Site walk and constraint inventory
Before quoting, we walk the lot: access route, overhead clearance, adjacent structures, tree locations and trunk diameters, root zone radii and spoil staging options.
Root zone flagging and team confirmation
Boundaries are flagged and photographed, and a written summary goes to your GC and arborist. If required work falls inside a root zone, we get your arborist's direction in writing before we proceed.
Equipment and mobilization plan
Machine chosen for the access, haul route confirmed, spoil staging identified. Most jobs start 1–3 weeks after approval.
Excavate inside the flagged boundaries
The machine works outside the flags. Hand digging at sensitive edges with arborist direction. If a root turns up shallower than expected or a flag has moved, we stop and call.
Spoil haul and lot restoration
Material hauled by the planned route, with no pile left in a root zone or against a structure. Final photos go to your team, with the flags visible in them.
Constrained Sites Cost More.
Here's Why.
Tight lot and tree-adjacent digs take more planning and smaller, slower machines. Base rates are below. Access, root-zone flagging and hand digging are added from the site walk.
| Line | Unit | Range | What moves it |
|---|---|---|---|
| Foundation excavation | per structure | $15,000–$28,000 | Footprint, access width, spoil handling, rock |
| Pool shell excavation | per pool | $4,500–$28,000 | Pool size, depth, access, rock |
| Utility trenching | per linear foot | $5–$40 | Depth and rock; hand-dug segments near trees cost more |
| Rock (limestone and caliche) | per cubic yard | $35–$90 | Rippable versus hammered |
| Root zone flagging, hand digging, tight-access premium | per job | Quoted after the site walk | Number of trees, hand-dig hours, staging room |
Prices reviewed: September 2026. Ranges for Austin and Central Texas; your site walk sets the final number.
The Trades Most Likely
to Hit These Constraints.
Central Austin Infill Usually Means Both Constraints
Older central Austin neighborhoods tend to have the narrowest lots and the largest mature trees. If you build infill in Austin, expect to deal with access and tree protection on the same job.
- Site walk on every tight or tree-adjacent quote
- Root zone documentation to your permit file before mobilization
- Arborist coordination built into the pre-dig process
- Machines chosen for the access, so there is no swap-out on day one
- See our page for infill developers
The Backyard Oak That's Bigger Than It Looks
Austin backyard pools often sit near mature trees, and the root zone can reach into the dig. If the arborist needs to be involved before we get in the ground, we tell you up front.
- Root zones measured and flagged before the pool layout is final
- Hand digging at tree-adjacent wall segments, with arborist direction
- Prompt word if site conditions require a plan change
- See our page for pool builders
What Contractors Ask About
Tight Lots and Trees.
Which trees are protected in Austin?
Inside Austin city limits, a protected tree is 19 inches or more in diameter, any species. A heritage tree is 24 inches or more and a listed species. Diameter is measured at 4.5 feet above grade. Removing a heritage tree 30 inches or more needs a variance under LDC 25-8-641.
How big is a critical root zone?
The critical root zone (CRZ) radius is one foot per inch of trunk diameter, so a 24-inch oak has a 24-foot CRZ. The drip line is not the CRZ. On a mature oak the CRZ often reaches past the canopy edge.
Can you dig inside a critical root zone?
Only within the limits of City of Austin ECM 3.5.2, and with your arborist involved. At least 50 percent of the full CRZ stays undisturbed, there is no cut or fill over 4 inches inside the half CRZ, and nothing happens inside the quarter CRZ. We flag the boundaries and coordinate with your arborist. We do not approve encroachments ourselves.
What are the penalties for damaging a protected tree?
The City of Austin sets penalties and mitigation, and they depend on the tree and the case. We don't quote figures. We plan the dig so the machine stays outside flagged boundaries, and we stop and call if something changes.
What is the tightest access you can work in?
We size the machine to the access. Send us the narrowest gate or side-yard width and we confirm on the site walk, along with overhead clearance, ground surface and turn radius at the dig, before we quote.
What if the pool layout has to move because of a root zone?
Better to learn that before the permit is pulled. We flag root-zone boundaries before your pool builder finalizes the layout, then tell you what we find. Your team decides how to adjust. Pool digs are priced on our pool shell excavation page.
Do you remove trees that are in the way?
Non-protected trees can come out as part of land clearing. We work around protected trees. If a protected tree conflicts with the design, that is a conversation with your arborist and the City. Full tree rules are on our selective clearing and heritage tree page.
Is there a time of year to avoid around oaks?
Yes. Texas A&M Forest Service advises avoiding wounding or pruning oaks roughly February through June, when oak wilt spreads most easily, and painting fresh wounds right away. If root or limb work near an oak has to happen in that window, raise it with your arborist first.
Does this cost more than a standard dig?
Yes. Smaller machines are slower, root-zone flagging takes time, hand digging is labor, and spoil handling on a tight lot means more haul trips. The site walk sets the number. Current ranges are on our pricing page.
Sources: City of Austin, Environmental Criteria Manual, Texas A&M Forest Service. Last reviewed: September 2026. This is not legal advice.
Tight Lots Need
a Walk, Not a Guess.
Send the address and what you're building. We walk the site, assess the constraints and quote in writing. Written quote within 48 hours of the site walk.
Austin and Central Texas · $2M per occurrence / $5M aggregate general liability