Quick Answer: Landscaping after a room addition or ADU project in San Jose typically costs $8,000-$40,000 depending on yard size, site conditions, and scope. A basic restoration (irrigation repair + seeding + perimeter planting) runs $8,000-$20,000. A full landscape redesign (new hardscape, irrigation, plants, lighting) runs $20,000-$60,000+. Landscaping is almost always disrupted during construction — heavy equipment, material staging, and concrete work damage or removes existing landscaping. This cost is rarely included in the addition contract and should be planned as a separate budget item.
Post-Addition Landscaping Budget Guide — San Jose 2025
| Scope | Cost Range | Includes |
|---|---|---|
| Basic turf and irrigation restoration | $4,000 – $10,000 | Lawn seeding/sod, irrigation repair, basic grading |
| Perimeter planting and mulch | $3,000 – $8,000 | Foundation shrubs, mulch beds, drip irrigation for plants |
| Concrete path/patio repair or new small patio | $3,000 – $12,000 | Pour new concrete or paver path/patio |
| Full hardscape (patio + path + retaining wall) | $15,000 – $40,000 | Pavers or concrete, drainage, retaining walls if needed |
| Complete landscape design + install | $25,000 – $75,000 | Design fees, all hardscape, irrigation, plants, lighting, sod |
When to Plan Landscaping — Before or After Construction?
- Plan the design before construction: Work with your contractor during the design phase to understand where equipment access will be needed, where materials will be staged, and where concrete forms will go. This helps you protect valuable trees and plants during construction
- Install landscaping after construction is 100% complete: Never install new landscaping before construction finishes. Final grading, concrete pours, utility trenching, and equipment movement will destroy any plantings installed too early
- Budget landscaping as 10-20% of the addition cost: As a rule of thumb, budget 10-20% of your addition contract for landscaping restoration. A $200,000 room addition typically requires $20,000-$40,000 in landscaping restoration
- Check for underground utilities after construction: Trenching for the addition’s utilities (electrical conduit, gas line, plumbing for ADUs) often cuts through existing irrigation lines. Have your landscaper check for all utility and irrigation damage before planning any new installation
Quartz Construction can coordinate with your preferred landscaper to plan the construction schedule around landscape protection goals. Contact us for a free consultation. CSLB #1003436 | Call (650) 749-7436.
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