You Just Bought the House. Now What Do You Do With the Trees?

Buying a home is a long list of decisions made quickly. The trees rarely make that list, until you’re standing in the backyard on move-in day, looking up at a massive oak that’s clearly been ignored for years, and wondering what you’ve actually inherited.

We hear this all the time. A homeowner in Sunnyvale recently reached out after buying an Eichler with mature fruit trees and an established landscape. She wanted to know what she had, what it needed, and how to set up a care routine before the growing season started. A simpler call came in the same week: someone who had just closed on a house in San Jose and said the trees needed attention, but couldn’t say what kind. That phrase, ‘the trees need attention,’ is probably the most honest thing a new buyer can say, because they’re right and they don’t yet have the information to be more specific.

This article is about getting that information. Specifically, the three things a first-look arborist assessment should answer for any new homeowner with mature trees on their property, and why getting those answers before you do anything else is the right call.

What You Cannot Tell From a Walkthrough

Real estate walkthroughs are designed to sell homes. They’re not designed to reveal tree problems.

A healthy-looking tree can have advanced internal decay at the root collar or in a major scaffold branch. A tree that looks scraggly and half-dead might be recoverable with the right pruning and some soil work. From the ground, without knowing the species, the history of care, or what’s happening below the bark, you’re guessing.

Here are the three practical unknowns that a proper first assessment should resolve:

• Which trees are protected under San Jose’s tree ordinance, and what that means for what you can legally do with them. The City of San Jose requires a permit before certain trees can be removed, based on species and trunk diameter. Inheriting a protected tree without knowing it can put a homeowner in a difficult spot if they later try to remove it without going through the right process.
• Which trees have structural defects that aren’t visible from the ground. Internal decay, included bark at major branch unions, and root damage from construction or compaction don’t show up during a walk-through. A trained eye, and in some cases a resistograph or percussion test, is what finds them.
• Whether your irrigation is actually reaching tree root zones or just wetting the surface. Most drip and sprinkler systems are set up for turf or shrubs, not for the deep, wide root zones that mature trees need. A tree can look fine for years while slowly declining from inadequate water in the root zone. Your irrigation system may be running without actually working the way you think it is.

None of these three things are visible on a walkthrough. All three can affect your safety, your legal standing, and your long-term property investment.

The Fruit Tree Problem New Buyers Don’t Expect

Mature fruit trees come up constantly in new homeowner consultations, and for good reason. They look productive and charming at purchase. But most inherited fruit trees have years, sometimes a decade, of deferred pruning behind them.

The challenge is that corrective pruning for a mature fruit tree is species-specific, and the timing and method matter a lot. Pruning a mature fig is completely different from pruning a plum. Neither follows the same logic as pruning a pine. Cut too much at the wrong time on some species and you trigger vigorous, weak regrowth. Miss the right window on others and you reduce that season’s fruit production unnecessarily.

The ISA’s tree pruning guidelines are clear that corrective work on mature specimens needs to be staged, you generally don’t restore years of neglect in a single session without stressing the tree. A consult before the first growing season gives you a clear picture of what the tree needs, in what order, and on what schedule. That’s far less costly than discovering, after the fact, that you made cuts that set the tree back by two or three years.

This is also where the difference between a certified arborist and a general tree crew matters most. A crew can make the cuts. An arborist tells you which cuts to make, and which ones to leave alone for now.

What a First-Look Tree Assessment Covers

A baseline assessment for a new homeowner typically works through five distinct areas. Here’s what each one involves.

Inherited Tree Situations: What They Usually Need First

New homeowners tend to inherit a mix of tree situations. This table gives a rough sense of what each common scenario typically calls for as a first step.

Making a Joint Decision With a Documented Assessment

One thing that comes up in calls from new buyers, more than I expected, is the ‘I need to talk to my spouse’ pause. And that makes complete sense. A tree assessment that recommends several thousand dollars in work, or flags a tree for eventual removal, is not a decision one person should make alone at the kitchen table after a phone call.

A written consultation report, with photos and clear notes on what was found and what the options are, gives both buyers a shared reference point. You can review it together, ask follow-up questions, and decide on timing without pressure.

This is one of the practical reasons we think a documented first-look assessment is worth doing early, even before you’ve settled on exactly what work you want done. It takes ‘the trees need attention’ and turns it into a concrete, prioritized list, which makes every conversation after that easier, including the one with your partner.

For buyers who are also planning any landscape changes, it’s worth noting that how landscape design works around mature trees is a whole separate consideration, some trees need to be accounted for in any design plan before the first shovel goes in.

A Note on Protected Trees and San Jose’s Ordinance

San Jose has a tree protection ordinance, and it applies to more trees than most new homeowners realize. Protected status is based on a combination of species and trunk diameter, and it affects what work you can legally perform, including removal, without a permit.

The ordinance covers common species including coast live oaks, valley oaks, and certain other native and heritage trees. A tree that measures above the threshold diameter at breast height triggers the permit requirement regardless of its condition. Getting the full picture on what San Jose requires before a tree comes down is important reading for any new buyer.

I’ve seen homeowners have to pause construction projects, fence installations, and landscaping work because a tree they assumed was theirs to manage freely turned out to be subject to the ordinance. Finding out during an assessment, rather than after you’ve already committed to a plan, saves real time and real money.

Frequently Asked Questions About New Homeowner Tree Assessments in San Jose