Landscaping & Hardscaping in Bellevue, WA

Bellevue is not one landform. It is a run of north-south ridges left behind by the Vashon ice sheet, with soft basins trapped in the low ground between them, and the difference between building on a ridge and building in a basin is most of the job. Somerset climbs the north face of Cougar Mountain toward a thousand feet. Lakemont sits on the mountain itself. Two miles away, Mercer Slough is a peat wetland deep enough that the highway crossing it is a piece of engineering in its own right. Kelsey Creek drains the middle. Any crew that prices every Bellevue address off the same template is guessing at the part that matters.

The housing follows those same lines. Northwest Bellevue and Enatai filled in during the 1940s and 50s on the lake side, and those lots carry mature canopy, tight side yards and original drainage that predates any code worth the name. Lake Hills was one of the largest postwar subdivisions in the state, thousands of ramblers dropped through the 1950s and 60s onto ground that had been drained peat farmland around Larsen and Phantom lakes. Somerset and Woodridge are view lots cut into a hillside in the 1960s and 70s. Lakemont and the Cougar Mountain plats went in during the 1990s, which puts their builder-installed block walls right at the age when the drainage behind them quits.

The requests are more consistent than the ground is. A level terrace big enough for a table and eight chairs, on a lot that falls twelve feet from the slider to the fence. Privacy from the three-story house that replaced the rambler next door. An entry sequence and a walkway that keep pace with an interior remodel. Lighting and a gas fire bowl so the space is still usable in October, which on the Eastside is when people actually want to be outside. On the lake side of I-405 we get a fair amount of view management too, where the brief is not more planting but the right planting at a height that will never grow into the water view.

What the crew hits depends entirely on which side of a ridge line the house sits on. Up on Somerset, Woodridge and Bridle Trails it is Alderwood till with cemented hardpan a foot or two down, so the drainage assembly behind a wall matters more than the block face does, and nearly every excavation finds the seep line where winter water rides sideways across the top of the pan. Down in the Lake Hills and Kelsey Creek basins we find peat and soft organic silt that will not carry a patio base without over-excavation, separation fabric and a deeper section, and now and then the remains of farm drain tile from the blueberry days. On the Cougar Mountain flank there are mapped coal mine hazard areas left from the Newcastle-era workings. That is a parcel-map check before anyone loads an excavator, not a discovery halfway through a dig.

Design gets drawn in our own office and our own crew sets the block, which matters more in Bellevue than in most places, because the city looks hard at grading, land disturbance and retained trees. A plan that ignores the root zone of the significant firs on a lot will not survive review, and it will not survive the trees either. Planting follows the exposure: rhododendron and evergreen huckleberry under retained conifers, hydrangea and Japanese maple on a shaded entry, hebe and lavender across a hot Somerset south face, carex and red twig dogwood in the low corner almost every Lake Hills lot turns out to have.