What does this cost, and what is involved?
How do you know you need tree health and hazard assessment in DeKalb County?
Most calls start with one of these. If you recognise more than one, treat it as urgent rather than routine.
- A large tree stands within falling distance of the house and you do not know whether it is sound.
- The crown has been thinning year over year, with smaller leaves and more visible sky through the canopy.
- Fungal conks or mushrooms are growing on the trunk, on a root flare, or on the ground directly over the roots.
- A stand of pine that was thinned or partially cleared in the last year or two now has trees swaying noticeably more than they used to in ordinary wind.
- A crack is visible in the trunk or a major union, or bark is separating in a vertical seam.
- A buyer, an insurer, or a permit application has asked for an arborist's written opinion.
- A neighbor's tree overhangs your house and you want a documented, dated opinion before you raise it with them.
- Several trees came down on the block in the last storm and the survivors are now exposed.
What actually causes this around Decatur?
Decay is invisible from the outside until late
Structural decay progresses inside the trunk while the tree keeps a full crown, because the tissue moving water is a thin layer under the bark. Conks, cavities, and old wounds are the external clues. Where the stakes justify it, instruments such as a resistance drill or sonic tomography can estimate how much sound wood remains, which is the difference between a guess and a measurement.
Documentation requirements from third parties
Insurers, buyers, HOAs, and municipal permit processes increasingly ask for a written arborist opinion. Inside the City of Atlanta, most regulated tree work now requires written arborist documentation as part of the application, which turns an assessment from a nice-to-have into a required step.
Risk is about the target as much as the tree
A hazard assessment weighs three things: how likely the tree or part of it is to fail, how likely something valuable is to be there when it does, and how bad the consequences would be. The same defective tree is a high priority next to a bedroom and a low priority at the back of a five acre lot.
This framing is why an assessment can conclude that a visibly imperfect tree is acceptable to keep.
Root problems that never show above ground
Root decay and root severance are the most under-diagnosed causes of whole-tree failure, because there is nothing to see until the tree is on the ground. Root plate movement, soil heaving, and a change in lean are the visible late-stage signs. History matters here: any excavation within the root zone in the last several years is a material fact.
Species behavior differs and it matters
Pine tends to fail whole. Water oak and willow oak commonly shed large limbs and are frequently decayed internally at maturity. Bradford pear splits at its unions almost as a rule. Knowing the species changes the failure mode you are looking for, which is why an assessment is not just a look at the trunk.
Post-storm exposure change
When neighboring trees are removed or blown down, the remaining trees face wind loads their wood was never grown for. Assessment after a clearing event or a storm is one of the highest-value times to have someone look, and it is the one most homeowners skip.
Local conditions in DeKalb County
How is the work done?
- Define the question. An assessment answers a specific question: is this tree likely to fail, what would it hit, and what are the options. Vague requests produce vague reports. Say whether you need it for your own decision, for an insurer, for a neighbor dispute, or for a permit.
- History and site review. The arborist asks what has changed: excavation, grade changes, irrigation, storm events, previous pruning or topping, and when the symptoms started. That history usually narrows the diagnosis faster than anything visible on the tree.
- Ground-level inspection. A systematic look at the root collar, the trunk, the unions, and the crown, checking for conks, cavities, cracks, response growth, deadwood, and lean, and looking at the soil for heaving or cracking around the base.
- Aerial or advanced inspection where warranted. Where the ground inspection raises questions, the next steps are climbing or a bucket to inspect the crown directly, or instruments such as a resistance drill or sonic tomograph to estimate remaining sound wood. These cost more and are used where the decision is genuinely close.
- Risk rating and options. The output is a rating of likelihood of failure, likelihood of impacting a target, and consequences, plus the options: do nothing and monitor, prune to reduce load, cable or brace, move the target, or remove. A good report gives you more than one option and the tradeoffs of each.
- Written report. A written, dated report with photographs is what has value with insurers, buyers, neighbors, and permitting offices. A verbal opinion at the curb is worth what it costs.
How much does tree health and hazard assessment cost in DeKalb County?
Typical range: $150 to $600 per assessment.
Consulting assessments are typically priced as a site visit fee plus a written report. No published Georgia figure for arborist assessment fees was found, so treat this range as indicative rather than sourced: what it actually costs depends on how many trees are evaluated, whether a formal written risk assessment report is required, and whether advanced diagnostics are used.
Some companies waive or credit the fee against work, which is worth knowing about because it changes the incentive.
| Cost driver | Why it matters |
|---|---|
| Advanced diagnostics | Resistance drilling, sonic tomography, air excavation of the root collar, and aerial inspection each add cost. They are worth it when the alternative is removing a large, valuable tree on a guess. |
| Documentation required by the local ordinance | Jurisdictions with strong tree ordinances often require specific arborist documentation as part of a permit application, which sets the format and depth of the report rather than leaving it to the homeowner's preference. |
| Number of trees evaluated | A single tree assessment is a short visit. A whole-property inventory on a wooded acre is a different scope and is usually priced per hour or per tree with a schedule. |
| Whether a formal written report is required | A verbal opinion during a quote visit is often free. A formal written risk assessment with photographs, ratings, and recommendations takes office time and is priced accordingly. |
| Independence of the assessor | A consulting arborist who does not sell removals charges for the opinion because the opinion is the product. A tree company that assesses for free is doing so as a sales call. Both can be honest, but the incentives differ and it is worth knowing which one you are getting. |
| Report turnaround | A report needed inside a due diligence window or a permit deadline may carry an expedite charge. |
What happens on the day of the job?
- Expect a range of options rather than a verdict. Most trees are not simply safe or unsafe.
- Expect the report to describe conditions on the date of inspection. No arborist certifies that a tree will not fail, and one who does is telling you something that cannot be true.
- Expect questions about what has been built, dug, or changed within the root zone. That history is often the whole answer.
- Expect a recommendation to re-inspect on an interval if the tree is being kept with known defects.
- Expect a written report to cost money and to be worth it if any third party will read it.
Which mistakes make this more expensive?
Cabling and then forgetting about it
Cables and braces are mitigation with an ongoing obligation. They need periodic inspection, and hardware installed twenty years ago in a tree that has grown around it is not doing what the homeowner assumes it is doing.
Relying on a free estimate as an assessment
A free visit from a company that sells removals is a sales call, and even an honest one is not a documented risk assessment. If the decision is expensive or contested, pay for an independent opinion from someone who is not bidding the work.
Assuming a full green crown means a sound tree
Trees carry full canopies over hollow trunks routinely, because water-conducting tissue is a thin layer just under the bark. Foliage tells you the tree is alive, not that it is structurally sound.
Ignoring changes at the base
Soil heaving on one side, cracked ground in an arc around the trunk, and roots newly visible where they were buried are late-stage indicators of root plate movement. These are the signs that justify treating a standing tree as urgent.
Which Georgia rules apply in DeKalb County?
Local detail that changes this job
Hurricanes Helene and Michael destroyed $2.04 billion of Georgia timber in six years
The Georgia Forestry Commission assessed $1.28 billion of timber loss across 8.9 million acres in 91 counties from Helene, and $762.7 million across 109 counties from Michael.
https://gatrees.org/resources/hurricane-helene-timber-impact-assessment/ ; https://gatrees.org/resources/hurricane-michael-timber-impact-assessment/Georgia Power trims trees near its lines only on a six-year cycle, and storm debris in the yard is the homeowner's responsibility
Georgia Power prunes vegetation on a planned circuit-by-circuit cycle — roughly once every six years — and does not schedule individual pruning requests. After a storm the utility clears trees off its lines, but its own FAQ states that debris cleanup on private property belongs to the property owner.
https://www.georgiapower.com/about/grid-reliability/land-tree-management.html ; https://www.georgiapower.com/about/grid-reliability/land-tree-management/faqs.htmlAtlanta-metro tree removal averages about $880, and emergency storm work carries a 20-50% premium
An Atlanta-area tree firm's published guide puts most removals between $735 and $2,000: small trees to 30 feet run $200-$450, large trees of 60-80 feet run $900-$1,800, and 80-foot-plus removals reach $3,000 or more. Stump removal runs $60-$350, and late winter is the cheapest season because trees are dormant.
https://www.atlantaarbor.com/blog/cost-of-tree-removal/Georgia's billion-dollar disaster rate has tripled
NOAA NCEI records 134 billion-dollar disasters affecting Georgia from 1980 to 2024, a long-run rate of 3.0 a year, but 9.8 a year across 2020-2024, with 13 in 2024 alone.
https://www.ncei.noaa.gov/access/billions/state-summary/GADeKalb County has metro Atlanta's oldest housing stock, median year built 1983
Census ACS housing-vintage data put DeKalb's median year built at 1983 across about 329,000 units, nearly a decade older than Georgia's statewide median of 1991, which is itself the third newest in the country.
https://www.census.gov/quickfacts/GAAtlanta tree removal averages $751-$880 per tree, and oaks cost more than pines
Angi's Atlanta page puts average tree removal at $751; Atlanta Arbor publishes $880. Small trees run $200-$500, 60-80 foot trees $900-$2,000, very large trees $1,500-$5,000+. Oak carries a 1.5-2x premium over pine at equal height, and emergency storm work in Georgia runs $1,000-$3,000+ at a 50-100% premium.
https://www.angi.com/articles/how-much-does-tree-removal-cost/ga/atlanta ; https://www.atlantaarbor.com/blog/cost-of-tree-removal/