When a tree is creating uncertainty on your project — a conflict with a proposed structure, a question about health or risk, or a requirement that a certified arborist sign off before plans move forward — you need direct access to someone who can evaluate it and put a professional opinion in writing. Todd Krellner, an ISA Certified Arborist with 20+ years of industry experience, provides arborist consulting across Washington, DC and the surrounding region.
DMV Horticulture provides certified arborist consulting for architects, engineers, developers, contractors, and homeowners throughout DC.
What Certified Arborist Consulting Covers
An ISA Certified Arborist has passed a rigorous exam covering tree biology, risk assessment, and care standards — and in DC, that certification is often a hard requirement before DDOT’s Urban Forestry Division will review your plans. Our consulting covers on-site tree evaluations, written arborist reports, risk assessments, and practical recommendations for working around trees during design and construction.
When You Need a Certified Arborist
- An architect or engineer needs an arborist’s sign-off before submitting plans for permit review
- A tree on or near your site raises a question about health, structural risk, or species
- DDOT’s Urban Forestry Division requires an arborist report as part of your permit application
- You need a second opinion before removing or working near a mature tree
- A construction activity may affect a tree’s root zone or canopy and you need a professional recommendation
What’s Included
- On-site tree assessment with a certified arborist
- Written arborist report suitable for permit submission or client records
- Risk and health evaluation of existing trees
- Practical recommendations for design or construction activities near trees
- Direct coordination with your architect, engineer, or general contractor
Our Process
Call, text, or email with your address and what’s prompting the consultation. Most site visits are scheduled within a day. Todd personally conducts the on-site assessment and prepares your written report — no handoff to a junior staffer, no generic templates.
Why DMV Horticulture
Every project is unique, and a one-size-fits-all recommendation isn’t much help when you’re trying to keep a project on schedule. Todd Krellner has spent 20+ years in the industry and holds ISA certification, and personally handles every consultation — the same person who visits your site is the one who writes your report and stands behind it.
Certified Arborist Consulting: Frequently Asked Questions
What does an ISA Certified Arborist certification mean? It means the arborist has passed an exam administered by the International Society of Arboriculture covering tree biology, care, and risk assessment, and maintains the certification through continuing education.
Do I need a certified arborist for a permit application? Many DC permit and Tree Preservation Plan submissions require sign-off from a certified arborist — check with DDOT’s Urban Forestry Division, or ask us and we’ll confirm for your specific situation.
How is this different from a tree service or removal company? Tree service companies handle physical tree work — pruning, removal, root-zone fencing. Arborist consulting is a professional evaluation and written report, which many general tree companies don’t provide even though they may do general tree care.
Can you evaluate a tree before I buy or develop a property? Yes — a pre-purchase or pre-development arborist consultation can flag tree-related risks or permitting requirements before they become a problem mid-project.
How fast can I get a consultation scheduled? Most site visits are scheduled within a day, and we prioritize urgent requests tied to permit deadlines or active construction.
Service Area
We provide certified arborist consulting throughout Washington, DC — from Georgetown, Capitol Hill, Cleveland Park, and Petworth to Adams Morgan, Chevy Chase, Shaw, Columbia Heights, Mount Pleasant, Brookland, Bloomingdale, and Foxhall.
Get In Touch Today
Call or text 443-934-0871 or email info@greenarearatio.com to schedule a certified arborist consultation.