A useful North Plains landscape plan begins with how the property drains and how it will be used. Measure grades, soil, sun, utilities, access, existing plants and maintenance capacity before selecting materials. Give bidders one scaled scope with quantities, preparation, irrigation, establishment care and acceptance standards so the proposals describe the same finished landscape.
Require a measured plan, drainage and utility findings, soil preparation, named plants and materials, irrigation zones, grading and permit responsibility, installation details, establishment care and acceptance evidence.
Record property edges, buildings, doors, slopes, low points, utilities, trees, hardscape, irrigation and access. Add sun exposure and how people, pets and equipment move through the yard. The base plan prevents planting, drainage and maintenance decisions from competing after installation starts.
Observe where runoff begins, crosses the property and leaves. Distinguish compacted soil, roof discharge, failed grading and irrigation leaks. The plan should state proposed elevations, collection points, soil disturbance and a lawful discharge path without sending concentrated water toward buildings or adjacent property.
Identify texture, compaction, organic matter, drainage and retained roots. Specify removal, loosening, amendment, finished depth and mulch rather than promising generic soil improvement. Keep imported material quantities measurable and protect the root zones of trees that remain.
Use mature height and width, sun, water, circulation and clearance needs to build the plant schedule. Record botanical names, container sizes, quantities, spacing and substitution rules. Avoid placing large shrubs or trees where growth will obstruct structures, utilities, sight lines or access.
Group plants with similar water needs and separate turf where practical. Document water source, pressure assumptions, valve and controller locations, head or emitter layout, sleeves, backflow responsibility and coverage test. Include seasonal programming and a shutdown or winter-care handoff.
Oregon law and utility guidance require coordination before digging. Mark the intended excavation area, obtain the locate and preserve marks during work. Private irrigation, lighting, drainage and other owner-installed lines may need separate locating because public utility marking does not identify every private service.
Significant excavation, fill, drainage changes, retaining conditions or work near a public route can require review. Washington County publishes grading and right-of-way guidance. Confirm the North Plains address and scope, then assign permit, erosion-control and inspection responsibilities before mobilization.
Set watering, weed control, mowing, replacement and adjustment duties for the establishment period. Walk every irrigation zone, inspect grades after watering, count plants and verify mulch depth and clean edges. Keep the scaled plan, plant schedule, controller settings, warranties and maintenance calendar.
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County guidance describes permits for grading, filling, excavation and soil movement and identifies erosion-control coordination.
Washington County states that work in a public right-of-way requires a permit.
Oregon Utility Notification Center provides the statewide process to request utility marking before excavation.
| Goal or condition | Scope choice | Evidence before acceptance |
|---|---|---|
| Standing water | Diagnose grades and discharge before planting | Elevation and drainage plan |
| Low-maintenance planting | Match mature size and water needs | Plant schedule and spacing |
| Lawn replacement | Define removal, soil preparation and new surface | Area quantities and establishment test |
| Irrigation changes | Map pressure, zones and coverage | Operating-zone walkthrough |
| Excavation near services | Locate utilities and protect crossings | Locate record and marked plan |
Cost follows measured area, access, removal, soil, drainage, grading, plants, hardscape, irrigation, utility conflicts, establishment care and maintenance expectations. Compare named quantities and installation details instead of an allowance per yard.
Map boundaries, elevations, drainage, utilities, retained plants, sun, access and circulation before selecting materials.
Identify the source and lawful outlet, then document proposed elevations and drainage work before planting or hardscape.
They make species, cultivar, mature size and substitutions clear when proposals and deliveries are compared.
Grouping similar water needs usually improves control; document zones and test coverage during closeout.
Coordinate the required utility locate before excavation and separately identify private lines not covered by public marking.
Grading, retaining, drainage or public right-of-way work may require review; confirm the address and actual scope.
It defines watering, weeding, mowing, adjustments and replacement responsibilities while new plants or lawn establish.
Keep the scaled plan, plant list, irrigation map and settings, approvals, warranties and maintenance schedule.
Share a site plan, photographs, drainage concerns, maintenance goals and desired uses so contractors can price one measurable landscape scope.
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