Tree Replacement Requirements: San Mateo vs South San Francisco
How do tree replacement requirements rules compare between San Mateo, CA and South San Francisco, CA?
South San Francisco has fewer restrictions than San Mateo.
San Mateo, CA
San Mateo County
When a protected tree is removed in San Mateo, replacement is required under the Protected Trees ordinance (Chapter 13.40). Replacement value is assessed using the Guide for Plant Appraisal. Street tree replacement is managed by the city. Development projects must preserve or replace trees.
View full San Mateo rules →South San Francisco, CA
San Mateo County
The San Mateo County Protected Tree Ordinance (No. 4895) requires replacement planting when a Significant or Heritage Tree is removed under permit. Standard replacement ratios range from 1:1 to 3:1 depending on the DBH and species of the removed tree. Replacement trees must meet minimum size specifications (typically 15-gallon to 24-inch box), be from an approved native/adapted species list, and established for a 2-year maintenance period. When on-site replacement is infeasible, an in-lieu fee is paid to the County Tree Replacement Fund.
View full South San Francisco rules →Key Facts Comparison
| Fact | San Mateo | South San Francisco |
|---|---|---|
| Protected Trees | Replacement required under Ch. 13.40 | - |
| Valuation | Guide for Plant Appraisal | - |
| Street Trees | City Public Works replaces | - |
| Development | Tree inventory and preservation plan | - |
| Public Works | 650-522-7300 | - |
| Ratios | - | 1:1 to 3:1+ |
| Minimum Size | - | 15-gal to 24-in box |
| Species | - | Approved native/adapted list |
| In-Lieu Fund | - | Pays to County Tree Fund |
| Maintenance | - | 2-year guarantee |
Highlighted rows indicate differences between cities.
San Mateo FAQ
Do I have to plant a replacement tree in San Mateo?
Yes, if a protected tree is removed. Replacement is assessed based on the tree's value under the Guide for Plant Appraisal.
Who replaces street trees?
The Public Works Department manages street tree replacement at 650-522-7300.
What about trees removed for construction?
Development projects must include a tree inventory and preservation plan. Trees removed must be replaced per the project conditions.
South San Francisco FAQ
What if I can't fit replacement trees on my small lot?
The Protected Tree Ordinance allows payment of an in-lieu fee to the County Tree Replacement Fund when on-site planting is demonstrably infeasible due to space, shading, or soil conditions. The fee is set by the Planning Department and funds replanting on County parks, rights-of-way, or restoration sites.
Can I plant fruit trees as replacements?
Productive fruit trees can sometimes qualify but are generally not favored because the ordinance aims to restore ecological canopy. Native oaks, California bay, big-leaf maple, buckeye, redwood (in appropriate zones), and approved drought-adapted species are preferred. Check the Planning Department's approved species list.
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