What Is Hardscaping?

Hardscaping refers to the non-living, structural elements of an outdoor landscape. These are the permanent, built features that define the usable space, manage water, and provide the framework around which all plantings and soft elements are arranged.

What Counts as Hardscape?

Does Hardscaping Include Fences and Decks?

Fences are generally classified as hardscape when they are structural elements of the landscape (stone walls, masonry fences, gabion walls). Wood or vinyl privacy fencing is more commonly handled by fencing contractors, though some hardscape companies include it in their scope.

Decks are typically considered a separate trade (carpentry/construction), though the interface between a deck and surrounding hardscape — steps, patio transitions, retaining walls beneath a deck — often falls within the hardscaping contractor's scope.

Is a Patio Considered Hardscaping?

Yes. Patios are one of the most common hardscaping elements. The material options include concrete pavers, natural stone (flagstone, bluestone, slate), poured concrete (plain, stamped, or exposed aggregate), and permeable pavers. Each performs differently in our climate.

Is Concrete Work Considered Hardscaping?

Yes. Poured concrete flatwork (driveways, walkways, patios), formed concrete retaining walls, and decorative concrete (stamped, stained, exposed aggregate) all fall under hardscaping. Concrete offers a cost-effective, durable option for many applications, though it lacks the modularity of paver systems and is more difficult to repair if cracking occurs.

How Much Do Hardscaping Services Cost?

Hardscaping costs in King and Pierce County depend on material selection, project complexity, site access, and the amount of grading or drainage work required. Here are realistic 2024–2025 local price ranges:

Patio and Walkway Costs

Retaining Wall Costs

Permit Note: Retaining walls over 4 feet in height (measured from the bottom of the footing to the top of the wall) require a building permit and engineered design in most King County jurisdictions. Walls that retain a surcharge (like a driveway or structure above) may require engineering at lower heights. Factor $1,500 to $4,000 for structural engineering into your budget for walls that trigger permit requirements.

Outdoor Kitchen and Fire Pit Costs

Request Your Free Hardscaping Estimate

What Is the Difference Between Hardscaping and Landscaping?

Every hardscaping project exists within a larger landscape context. A patio surrounded by dying plants and poor drainage fails visually and functionally, regardless of how well the pavers were laid. The best outcomes happen when hardscaping and softscaping are designed and installed together by a company that handles both.

MTS Tree & Landscape provides integrated hardscaping and landscaping services, so your structural elements and plantings work as a unified design. Call (425) 369-8733 to discuss your project.

What Is the Difference Between Hardscaping and Softscape?

The design balance between hardscape and softscape determines both the aesthetic character and the long-term maintenance burden of your outdoor space. More hardscape means less ongoing maintenance but higher upfront cost. More softscape means lower upfront investment but ongoing labor and water costs. Most residential properties in our area perform best with a 40/60 to 50/50 hardscape-to-softscape ratio.

Who Offers Professional Hardscaping Services Near Me for Patios, Walkways, and Retaining Walls?

The quality of a hardscaping installation is almost entirely determined by what happens below the surface. The base and sub-base are invisible once the project is finished, but they determine whether your patio is still level in ten years or showing settlement cracks in three.

Base Preparation

In King County's clay-heavy soils, a proper paver patio requires:

• Excavation to 8 to 12 inches below finished grade
• Geotextile fabric over the subgrade to prevent clay migration into the aggregate
• 6 to 8 inches of compacted crushed rock base (¾-inch minus), installed and compacted in 2-inch lifts
• 1 inch of leveling sand (screeded, not compacted)
• Pavers installed with appropriate edge restraint
• Polymeric sand in joints to prevent weed growth and insect entry

A contractor who skips the geotextile, uses only 3 inches of base, or does not compact in lifts will produce a patio that settles unevenly once the soil beneath absorbs moisture and heaves through our freeze-thaw cycles. By the time you notice the problem, the fix requires pulling up the entire surface and rebuilding from scratch.

Drainage Integration

Every hardscape surface redirects water. A professional installation accounts for:

• Surface grading (minimum 1% to 2% slope away from structures)
• Subsurface drainage behind retaining walls (gravel backfill and perforated drain pipe)
• Integration with the property's overall drainage system
• Stormwater code compliance (particularly relevant for impervious surface limits in Seattle and Sammamish)

What Materials Are Best for Patios and Walkways?

Material selection for Pacific Northwest hardscaping should prioritize freeze-thaw resistance, slip resistance when wet (critical in a region with 8+ months of rain), color stability, and long-term maintenance requirements.

Climate Insight: Avoid polished or smooth-finish stone for walkways and patios in our area. Surfaces that perform beautifully in dry climates become hazardous in a region where rain, moss, and algae are constants. Textured, thermal-finished, or tumbled surfaces provide the grip needed for safe use year-round.

How Do I Choose Between Different Hardscaping Services for Driveway Pavers and Stonework?

Get three written, itemized proposals. Compare base preparation specifications, material specifications, drainage provisions, and warranty terms. A $20,000 patio built on 8 inches of properly compacted base with geotextile and drainage is a fundamentally different product than a $14,000 patio built on 4 inches of loose gravel with no fabric.

Where Can I Find Hardscaping Services That Include Drainage Solutions and Grading Work?

Drainage is not an optional add-on in our region. It is an integral part of every hardscaping project. The combination of clay soils, heavy rainfall, and sloped lots that define much of King and Pierce County means water management must be designed into the project, not addressed after problems appear.

How Do You Ensure Proper Drainage?

Surface Drainage

• All flatwork graded at minimum 1% slope (1/8 inch per foot) away from structures
• Low points directed to collection points (catch basins, channel drains)
• No ponding zones on paver or stone surfaces

Subsurface Drainage

• French drains behind all retaining walls (4-inch perforated pipe in gravel, wrapped in filter fabric)
• Curtain drains to intercept subsurface water flow before it reaches hardscape or foundations
• Dry wells for concentrated runoff in areas without storm sewer access
• Drain pipe daylight locations planned for gravity flow

Stormwater Compliance

• Seattle limits impervious surface to specific percentages by zone. New hardscape may trigger stormwater management requirements.
• Permeable paver systems can satisfy impervious surface limits while providing a fully functional patio or driveway surface.
• Sammamish and Issaquah have similar stormwater requirements that affect hardscape project planning.

If trees need to be removed to accommodate your hardscape project, municipal tree codes apply. Our Seattle tree removal permits guide covers the requirements and process for permit applications.

Which Hardscaping Services Can Design and Build an Outdoor Kitchen or Fire Pit Area?

Outdoor kitchens and fire pit areas represent the most complex residential hardscaping projects. They involve masonry, gas line installation, electrical, plumbing (for sinks), ventilation, and structural considerations that go beyond standard flatwork or wall construction.

Design Considerations for Outdoor Kitchens in Our Climate

• Roof structure or overhead cover. In the Pacific Northwest, an outdoor kitchen without rain protection sees limited use. A pergola with a solid roof, an attached patio cover, or a freestanding pavilion extends usability to 10+ months per year.
• Material durability. Countertops must withstand moisture, freezing temperatures, and UV exposure. Granite, concrete, and porcelain tile perform well. Marble and some engineered quartz are less suitable for outdoor use in our climate.
• Appliance specification. Outdoor-rated stainless steel appliances are mandatory. Indoor appliances will corrode within 1 to 2 years in our moisture-heavy environment.
• Gas and electrical. Licensed plumber and electrician involvement is required for gas line and electrical connections. Building permits are required in all King County jurisdictions for gas and electrical work.
• Drainage. The cooking area needs floor drainage to handle both rain and cleanup water.

Fire Pit Design Choices

Fire Code Note: King County and most municipalities require minimum setbacks for fire features: typically 10 feet from structures and property lines for wood-burning, and 5 to 10 feet for gas fire features. Confirm setback requirements with your local jurisdiction before design begins.

Where Can I Hire Hardscaping Services to Repair or Replace a Failing Retaining Wall?

Retaining wall failure in King and Pierce County is overwhelmingly caused by three factors: inadequate drainage behind the wall, insufficient base preparation, and lack of geogrid reinforcement in walls that needed it.

Signs of Retaining Wall Failure

• Visible leaning or bulging outward
• Horizontal cracking along mortar joints or block courses
• Cap stones shifting or falling off
• Soil erosion appearing at the base
• Water seeping through the wall face (indicating failed drainage)
• Settlement or separation at corners and ends

Repair vs. Replacement Decision Framework

A retaining wall that is actively failing is a safety hazard, particularly on sloped lots common throughout Sammamish, Issaquah, and the east King County foothills. If a wall failure has also destabilized trees on the slope, our team can address emergency tree hazards as part of the site stabilization.