Raising the crown, clearance without wrecking the outline.

When raising is the right call

• A mature front-garden lime or sycamore whose lower branches are dragging on the pavement and forcing walkers into the road
• Vehicle-height clearance over a driveway, the standard target is 2.5m for a car, 4.5m for a delivery van, 5.2m for a road
• Sightlines at a junction or at the top of a drive where a tree has grown into the line of view
• A tree leaning on the render of a house or garage, lower limbs off, then re-check whether a reduction is also needed higher up

How high to raise

A rule of thumb: after raising, the live crown should still be at least two-thirds of the total tree height. Take too much off the bottom and the tree looks bare-legged; it's also mechanically weaker in a wind because the wind-load on the remaining branches has increased. If the maths says the tree needs to lose more than a third of its live crown for the clearance you want, a raise is the wrong tool, you probably need a reduction, a fell, or to change the target height.

Species notes

• Lime, sycamore, London plane, the classic raise candidates. All three respond well and grow into a good shape above.
• Oak, light raise only, and only outside spring flush. Oaks resent heavy lower-limb work.
• Cedar, monkey puzzle, ornamental conifers, a raise fundamentally changes their form. Owners often regret it. We'll flag it before we cut.
• Fruit trees (apple, pear), often raise-and-thin together for orchard picking access.

Pricing

Single-tree crown raise in Canterbury typically runs £220 – £600. Roadside or over-driveway work sometimes needs a small MEWP (cherry-picker) hire for one day and coning of the road, which adds cost; we call this out on the quote rather than absorb it into a vague day rate.

Before we cut

Same as all our tree work, conservation-area and TPO check first. If the raise takes the crown lower than it was measured at when the TPO was made, or the tree was on the Ancient Woodland register (relevant for the Blean fringe), that changes the paperwork window. We do that check as part of the quote.