© 2026 TerrainPortland, OR
Overhead twilight view of a completed garden — bluestone terrace glowing faintly, ornamental grasses catching the last amber light
Terrain Studio · Est. 2009 · Portland, Oregon

We Design the
Ground You
Stand On.

Grading slopes, threading gravel paths through native plantings, and building dry-stack walls that look like they've been there a century.

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Native PlantingsDry-Stack StoneGravel PathsSlope GradingBluestone TerraceRain GardensOrnamental GrassesSite DrainageWoodland EdgesBoulderworkNative PlantingsDry-Stack StoneGravel PathsSlope GradingBluestone TerraceRain GardensOrnamental GrassesSite DrainageWoodland EdgesBoulderworkNative PlantingsDry-Stack StoneGravel PathsSlope GradingBluestone TerraceRain GardensOrnamental GrassesSite DrainageWoodland EdgesBoulderworkNative PlantingsDry-Stack StoneGravel PathsSlope GradingBluestone TerraceRain GardensOrnamental GrassesSite DrainageWoodland EdgesBoulderwork
Aerial view of a bluestone terrace garden with mature tree canopy and geometric stone pathways
Chapter 01
Residential · Portland, OR

The Lautner
Residence

A bare acre behind new construction — compacted fill, zero topsoil, one drainage easement cutting diagonally across the site. We read the land before we touched it.

Site Area

0.9 ac

Completion

2023

Stone Laid

840 ft

Species

34

Close-up of dry-stack stone wall with native ferns growing in crevices
Gravel path winding through ornamental grasses at golden hour
Overhead view of bluestone terrace with ground cover plantings between stones
01
field note, October 2023
"Drainage isn't a problem to solve at the end. It's the entire logic of the design."

The Lautner site had a 4% cross-slope toward the house foundation — the kind of thing a builder grades flat and hands off. We kept the slope, redirected it through a shallow swale disguised as a planting bed, and let it feed a rain garden at the property's low corner. The ornamental grasses there will be twice the size of anything irrigated, because they're drinking the whole site's runoff.

Stone Selection

Pennsylvania bluestone, thermally finished. Warm gray that reads warmer at dusk, cooler at midday.

Planting Strategy

70% native species. Switchgrass, prairie dropseed, little bluestem — all drought-tolerant once established.

Ten-Year Projection

Canopy closure at the east edge. Stone walls colonized by moss and lichen. No irrigation required.

— M. Calloway, Principal
Estate garden with dry-stack stone retaining walls, woodland edges, and manicured gravel paths at dusk
Chapter 02
Estate · Willamette Valley, OR

Hawthorn
Estate

Fourteen acres of inherited garden gone feral — sixty-year-old laurel hedges, collapsed stone walls, a kitchen garden buried under two decades of volunteer trees. We spent a full season listening before cutting a single branch.

Site Area

14 ac

Walls Rebuilt

1,200 ft

Trees Removed

47

Completion

2024

Rebuilt dry-stack stone retaining wall with creeping thyme and sedums growing in joints, estate garden
Close-up detail of hand-laid stone path with moss filling the joints, dappled woodland light
Restored kitchen garden with raised beds, gravel paths, and espaliered fruit trees against stone wall
02
field note, March 2024
"The wall doesn't need to look built. It needs to look found — like the hillside simply decided to hold itself there."

Every stone in a dry-stack wall is a decision. Not mortared, not hidden — just set. The angle of lean, the choice of face, which crack to leave open for the sedums. We sourced this basalt from a quarry forty miles east, split along its natural planes so the texture would read as geological, not manufactured.

In ten years the wall will have lichens on its north face and toadflax threading the lower courses. The clients won't remember we built it. That's the goal — a landscape that belongs to the land, not to us. The best work disappears into its place.

— M. Calloway, Principal
Start a Conversation

Describe
Your Land.

Tell us what you're working with. No brief is too bare, no garden too far gone. We start every project by listening.

01 — What kind of property is this?

02 — What's the single biggest challenge with the current site?

03 — Where is the property, and how do we reach you?

Read the Journal first

We respond within two business days. No automated replies. A human reads every message.