A maple looks small in a nursery pot, which is exactly why so many end up crowding a roof or a foundation 25 years later. The right distance depends on which maple you are planting, because their mature sizes are very different. Start from the mature width, not the height of the sapling.
The short answer: plant a maple at least half its mature width away from the house, plus a few extra feet for a roof overhang and maintenance. For large shade maples like sugar, red and silver maple, that means roughly 20 to 30 feet. Small maples such as Japanese maple usually need 10 to 15 feet. Avoid planting silver maple near the house or sewer lines at all.
Distance by maple type
The figures below use mature sizes published by the Morton Arboretum for the large native maples. The suggested distance is from the trunk to the nearest wall.
| Maple | Mature height | Mature width | Suggested distance from house |
|---|---|---|---|
| Sugar maple | 60 to 75 ft | 40 to 50 ft | 25 to 30 ft |
| Red maple | 40 to 60 ft | 35 to 45 ft | 20 to 25 ft |
| Silver maple | 50 to 70 ft | 30 to 50 ft | 30 ft or more, ideally away from buildings |
| Narrow red maple cultivars, e.g. ‘Armstrong Gold’ (about 12 ft wide) | about 40 ft | about 12 ft | 10 to 15 ft |
| Japanese maple (most cultivars) | 15 to 25 ft | 10 to 25 ft | 10 to 15 ft |
These are starting points, not exact rules. Cultivars vary a great deal, so check the tag for the specific tree you buy. Many red maple cultivars are bred to be narrower or more compact than the species.
Why half the mature width?
A tree’s crown spreads out roughly equally on all sides. If a maple grows 40 feet wide, its branches extend about 20 feet from the trunk. Planting it 20 feet from the house puts the branch tips right at the wall. A few extra feet keeps branches off the roof and siding, keeps gutters clearer and leaves room for a ladder, a walkway or future pruning.
What about the roots?
Maple roots spread wide and shallow, usually well beyond the edge of the crown. The Morton Arboretum notes that red maple needs plenty of room for its dense, spreading root system. Shallow roots can lift sidewalks and patios and compete with lawns and flower beds.
Foundations are a smaller risk than most people fear. Tree roots rarely break a sound foundation on their own. The bigger concerns are:
- Sewer and water lines. Roots seek moisture and can grow into pipes that already have cracks or loose joints. The Morton Arboretum notes that silver maple has a vigorous root system that can invade sewer pipes.
- Shrinking clay soils. In heavy clay, a large tree can dry the soil during droughts, which can contribute to settling near a shallow foundation.
- Paving. Shallow roots under driveways and patios can lift slabs as they thicken.
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Silver maple: a special case
Silver maple grows fast, which makes it tempting. It is also weak-wooded and prone to storm damage, and its roots are aggressive. The Morton Arboretum notes that many authorities recommend against planting it at all in home landscapes. If you want a fast, large maple, a red maple or a red and silver maple hybrid such as ‘Autumn Blaze’ is usually a better choice, still planted well away from the house.
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Look up and look down
The International Society of Arboriculture’s planting guidance is to look up and look down before choosing a spot.
- Look up. Do not plant a large maple under or near overhead power lines. The utility will eventually have to prune it for clearance, which leaves an unnatural shape and can shorten the tree’s life.
- Look down. Call 811 a few days before you dig so underground lines can be marked. Note where your sewer line runs and keep large maples well away from it.
- Look around. Consider sidewalks, driveways, the neighbor’s property and where shade will fall. A large maple on the south or west side of a house can cool it in summer, as long as it is far enough away.
Small yards
If you do not have 25 feet to spare, choose a smaller maple rather than a big one you will have to fight later. Options include Japanese maple, a narrow red maple cultivar, or other compact species. A small tree in the right spot will look better and live longer than a large one cut back again and again.
Already planted too close?
If a young maple is too close, moving it in its first year or two, while dormant, is often realistic. For an established tree, focus on regular pruning to keep branches off the roof, and ask a certified arborist about the roots and the risk to nearby pipes. The ISA Find an Arborist directory is a good place to start.
For more on maple care, see the best time to prune a maple, or browse Choosing the Right Tree.
Sources
- Sugar Maple, The Morton Arboretum
- Red Maple, The Morton Arboretum
- Silver Maple, The Morton Arboretum
- Planting a Tree, International Society of Arboriculture, TreesAreGood.org
- Acer palmatum (Japanese Maple), NC State Extension Gardener Plant Toolbox
Top photo: Famartin, CC BY-SA 4.0, via Wikimedia Commons