Seattle
Landscaping & Hardscaping in Magnolia, Seattle
Quick answer
Magnolia sits on a bluff of Esperance sand over Lawton Clay, which is why the west and south slopes are mapped landslide-prone and why drainage and engineering come before layout. We build view-conscious walls, terraces, steps, patios and irrigation here, about forty minutes from the Kent shop.
- From our Kent shop
- about 40 minutes
- ZIP codes served
- 98199
- Licensed in WA
- Bonded & insured
Magnolia sits on a bluff. That bluff explains almost everything about how we build here. Fort Lawton, now Discovery Park, is the type locality for the Lawton Clay, the dense glaciolacustrine unit under this part of Seattle. Above it is Esperance sand, which water moves through easily. Above that, up on the crown, Vashon till. Rain sinks through the sand, hits the clay and can't keep going down. So it turns sideways and comes out of the slope face as a seep. That's what drives the slides Perkins Lane has taken more than once, including the well-documented losses in the mid-1990s. It's also why Seattle maps long stretches of the western and southern slope as landslide-prone. Anything we build near that line gets engineered. We don't eyeball it.
The houses here are older and bigger than most of Seattle. Southeast Magnolia and the blocks around Magnolia Village went up in the 1920s and 30s. Brick Tudors, Colonials, clinker-brick bungalows, real front yards. Lawton Park, Briarcliff and Carleton Park filled in after the war with ramblers and daylight basements pointed at the water view. Those lots often run seven to ten thousand square feet, which is generous for Seattle. The gardens came with the houses. Sixty-year-old rhododendrons that are small trees by now. Laurel hedges doing the job of a wall. Douglas fir and bigleaf maple with root plates running under exactly the ground you want to pave. On a lot of first visits here we spend more time finding roots than measuring squares.
Three bridges get you into Magnolia. That's all there is. The Magnolia Bridge from the south, Dravus in the middle, Emerson at the north end. The Magnolia Bridge is old, took damage in the 2001 Nisqually earthquake, and has been in city replacement planning ever since. We route heavy deliveries with that in mind. We never assume all three approaches are open the day base rock shows up. Once you're up on the hill the streets narrow and start following the contours. Driveways on the bluff side are short, steep, sometimes shared. Alleys are rare outside the older southeast blocks. Plenty of material ends up moving by buggy or conveyor from a staging spot on the street. We'll say so in the estimate.
View drives nearly every Magnolia design we draw. People want to sit outside and still see the Sound and the Olympics. That keeps the whole vocabulary low. Seating walls do the work a fence would do. We step a terrace down into the slope instead of building it up out of it. Plants get picked for what they'll be in ten years, so dwarf conifers and low evergreen structure, nothing that hits six feet in five years and becomes a removal problem. Wind is the part homeowners forget. A bluff-top garden on the west side takes salt-loaded southwesterlies straight off Puget Sound. Species that thrive two blocks inland scorch out there. Hebe, lavender, kinnikinnick, salal and dwarf conifers hold their own. Hydrangea, Japanese maple and vine maple go on the sheltered east side of the house, where they're actually happy.
Digging in Magnolia is two different jobs. Depends where the lot sits. On the crown, near the Village and across the flatter interior, it's shallow soil over Vashon till and the usual hardpan behavior. Water perches, winter yards stay soft, and the base section has to drain to daylight. Down the slope the sand runs. A cut that stands clean at nine in the morning will slough by early afternoon. So we bench, shore or step the excavation. We don't pretend we can hold a vertical face. Drainage goes in behind a wall before the next course goes on top of it. Springs show up mid-slope in spots that were dry all summer. Near Discovery Park we hit Fort Lawton era infrastructure, buried concrete and abandoned utility runs that appear on no current drawing. We call 811, then still open the first two feet by hand.
Ground conditions in Magnolia
Magnolia is a glacial upland with a bluff around most of its western and southern edge. The layers under it are why it behaves the way it does. Vashon till caps the crown. Below that sits Esperance sand, permeable and loose. Below that is the Lawton Clay, dense and effectively impermeable, with its type section at Fort Lawton inside Discovery Park. Water soaking into the sand can't get through the clay. It moves sideways and comes out of the slope face as seeps and springs. That's the classic Puget Sound landslide mechanism. It's why Perkins Lane and the Elliott Bay side have a documented slide history, including major losses in the mid-1990s. Seattle maps large parts of that slope as landslide-prone and steep slope critical area. The interior crown is more ordinary. Around Magnolia Village, Lawton Park and Carleton Park you get a shallow soil layer over till hardpan, winter water perching instead of soaking in, and cobbles in the dig. Two more things come up constantly. Mature Douglas fir, bigleaf maple and decades-old rhododendron and laurel plantings put root plates across most of the ground a patio would want. And on the exposed bluff-top lots, salt-laden southwest wind off Puget Sound burns tender foliage and shortens the practical plant list considerably.
Permits
Magnolia permits through the City of Seattle. SDCI handles construction review, SDOT handles anything in the right of way. A retaining wall over 4 feet, measured from the bottom of the footing to the top of the wall, needs a permit with stamped structural engineering. Any wall carrying a surcharge from a slope, a driveway or a foundation above gets engineered no matter the height. The big local factor here is the Environmentally Critical Area overlay. Seattle maps steep slope areas at 40 percent grade or greater with at least ten feet of relief, plus landslide-prone and known slide areas. Those designations cover much of the Magnolia bluff, from Perkins Lane around toward Discovery Park and along the Elliott Bay face. Inside them, a geotechnical report is a normal part of the submittal. Grading and clearing thresholds drop well below the citywide numbers, and drainage review gets more attention than the hardscape itself. Seattle stormwater rules currently pick up projects adding or replacing roughly 750 square feet or more of hard surface. A terrace plus a walkway can reach that. Under the 2023 tree ordinance, removing most sizeable trees on a developed residential lot takes a permit and a registered tree service provider. That matters in a neighborhood full of mature conifers. Parcels near the water fall under the Shoreline Master Program within 200 feet of the ordinary high water mark. Overlay boundaries are parcel-specific and the thresholds get revised. So we confirm what applies with the city at permit time before we commit to a layout.
Neighborhoods we work in
- Magnolia Village
- Lawton Park
- Briarcliff
- Carleton Park
- Southeast Magnolia
- Perkins Lane
- Interbay
Services we offer in Magnolia
Magnolia: common questions
My lot is in a mapped landslide-prone area. Can I still build a patio or wall?
Usually yes. You need a geotechnical engineer in from the start, and a design that treats water as the main structural problem. On the Magnolia bluff, things fail when groundwater comes out where the Esperance sand meets the Lawton Clay. So the wall, the drainage behind it, and the way surface water gets collected and discharged all have to be designed together. The geotechnical report is part of the permit package. Review also takes longer inside a critical area. We'd rather tell you that at the first visit than surprise you at submittal.
How do you design a terrace without giving up the view?
We go down instead of up and keep everything low. On a view lot we'd rather cut a level terrace into the slope and hold it with a wall you look over. A raised deck puts a railing right in your sightline. Seating walls do a fence's job at eighteen inches. Fire features get specified as bowls and low tables, no tall surrounds. Planting is chosen for mature height first. Dwarf conifers, hebe, kinnikinnick and salal near the view edge. The taller rhododendron, hydrangea and Japanese maple go behind the house, where they frame the view instead of blocking it.
What actually survives on an exposed bluff-top lot here?
Less than the nursery tag suggests. West-facing Magnolia gardens take salt-carrying southwest wind straight off Puget Sound. Wind and salt together burn foliage that would be perfectly happy in a sheltered yard a few blocks inland. What holds up here: hebe, lavender, kinnikinnick, salal, evergreen huckleberry and dwarf conifers. Sword fern and carex work where there's some shelter. Japanese maple, vine maple and hydrangea go on the lee side of the house. We also build wind shelter into the design with low evergreen structure. Don't count on the plants to just tough it out.
How does the bridge situation affect a project on the hill?
It's a logistics thing more than a schedule thing. Magnolia has three approaches and no others: the Magnolia Bridge, Dravus and Emerson. The Magnolia Bridge is aging, took damage in the 2001 Nisqually earthquake and has been in city replacement planning for years. So we plan deliveries assuming any one of the three could be constrained that day. We're roughly forty minutes out from our Kent shop. Material and crew arrive separately. On the narrow bluff lanes we confirm a legal staging spot before the first truck gets scheduled.
There are large firs and maples around the work area. Is that a problem?
It's a design input. Two things matter. Seattle regulates removal of most sizeable trees on developed residential lots and requires a registered tree service provider to do that work. Separately, cutting roots inside the protected zone of a tree you intend to keep puts that tree at real structural risk, even when no permit is involved. A wall footing is a root cut. So is a compacted base section. We locate the significant trees on the first visit and route the hardscape around the root plates. Where we have to get close, we use a floating base or step the alignment.
