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London planetree: mature size, roots and how far from the house to plant it
London planetree, Platanus × acerifolia: how big it gets, what its roots do, and the planting distances to keep from a house, patio, septic field, sewer line and power lines, with a checker for your spot.
London planetree grows 70–100 ft tall and 65–80 ft wide, per the Morton Arboretum. Plant it at least 40 ft from the house, 10 ft from a patio or driveway, 100 ft from a septic field and 20 ft from a sewer line. It grows too tall for under power lines. Checked Nov. 13, 2026.
Is your spot far enough away?
| House | — |
| Patio, driveway or walk | — |
| Septic field | — |
| Sewer line | — |
| Power lines | — |
Measure from the trunk. The rules behind each number are in the table below. Your township, utility or septic permit can set its own setbacks.
London planetree facts
| Mature height | 70–100 ft |
|---|---|
| Mature width | 65–80 ft |
| Size class | Large |
| Growth rate | Fast |
| Hardiness zones | 5–8 |
| Light | Full sun (6 hrs direct light daily), Partial sun / shade (4-6 hrs light daily) |
| Soil | Moist, well-drained soil, Wet soil; tolerates alkaline soil, clay soil, dry sites, occasional drought, occasional flooding, wet sites |
| Form | Broad, Pyramidal |
| Origin | Not native to North America (Morton lists it as non-native) |
From Morton Arboretum. Its zone range includes zone 6, which covers most of central Pennsylvania; check your own with our hardiness zone by ZIP tool.
London planetree roots
No root warning found.
How far to plant london planetree from things
| From | Plant at least | The rule |
|---|---|---|
| House or building | 40 ft | Half the mature canopy width (eXtension) |
| Patio, driveway or walk | 10 ft | Large shade trees need at least 10 ft of rooting area (Iowa State) |
| Septic drain field | 100 ft | At least the root spread, estimated from mature height (Virginia Cooperative Extension), or the canopy width (University of Florida), and no closer than 20 ft for small trees (UMaine) |
| Sewer line or lateral | 20 ft | “Do not plant trees within 20 feet” of a sewer line (PA Water Environment Association) |
| Overhead power lines | 50 ft | Tall-growing trees at least 50 ft from lines (PPL Electric) |
| Retaining wall | 40 ft | At least 5 ft from the wall, with the canopy edge behind the wall (CMHA) |
Distances use the top of the size range, measured from the trunk. The full sources are in our tree planting distance guide.
Other large trees
50–70 ft tall, 30–50 ft wide. Plant 25 ft from the house.
40–60 ft tall, 35–45 ft wide. Plant 23 ft from the house.
60–75 ft tall, 40–50 ft wide. Plant 25 ft from the house.
60–70 ft tall, 40–50 ft wide. Plant 25 ft from the house.
60–75 ft tall, 60–75 ft wide. Plant 38 ft from the house.
50–80 ft tall, 100 ft wide. Plant 50 ft from the house.
Questions
How big does london planetree get?
London planetree grows 70–100 ft tall and 65–80 ft wide at maturity, per the Morton Arboretum. Growth rate: fast.
How far from the house should you plant london planetree?
At least 40 ft, half of its 65–80 ft mature width, so the canopy clears the house. Keep it 10 ft from a patio or driveway.
Do london planetree roots damage foundations, patios or pipes?
No root warning found.
What zones does london planetree grow in?
London planetree is listed for USDA zones 5–8 by the Morton Arboretum. That includes zone 6, which covers most of central Pennsylvania.
Can london planetree go under power lines?
No. At 70–100 ft it outgrows the 25 ft limit for trees under lines; PPL says to plant tall-growing trees at least 50 ft from lines.
Sources: Morton Arboretum (Platanus × acerifolia); planting distances from the sources in our tree planting distance guide: eXtension, Morton Arboretum, Iowa State, University of Florida, Virginia Cooperative Extension, UMaine, PA Water Environment Association, PPL Electric, WV Forestry and CMHA. Checked Nov. 13, 2026.
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