Hardscaping FAQ — patios, walls & walkways in Lake County

Hillside Landscape answers the hardscaping questions Lake County and North Shore homeowners ask most — from paver patio costs and choosing between pavers, stone, and concrete to the deep aggregate base our freeze-thaw climate demands. Based in Lincolnshire and serving fourteen communities across Lake County and the North Shore since 2001, we build patios, walkways, and retaining walls engineered to stay flat through every freeze-thaw cycle this region throws at them.

How much does a paver patio cost in the Lake County / North Shore area?

These are typical ranges only and vary with your site, materials, and access — the North Shore tends to run toward the higher end because of premium materials, tighter sites, and the quality expectations here. The table below is for rough budgeting; the only accurate number comes from an on-site walkthrough.

Grading, drainage work, demolition of an existing surface, steps, seating walls, and premium materials all push costs up. Because every property is different, we give a firm, itemized quote after walking your site — see our hardscaping services page for what's included.

Pavers vs. natural stone vs. poured concrete — how do I choose?

Concrete pavers are the most popular choice across the North Shore. They're durable, come in a huge range of colors, textures, and patterns, flex with freeze-thaw movement instead of cracking, and — because they're individual units — can be lifted and reset if a utility runs underneath or a section ever needs attention.

Natural stone (bluestone, flagstone, granite) is the premium look, with character and variation that manufactured products can't match. It costs more and takes more skilled labor to set, but for homeowners who want a distinctive, high-end result it's worth it.

Poured concrete has the lowest upfront cost, but in our climate it tends to crack along the freeze-thaw cycles and is difficult to repair invisibly — a patch rarely matches. For most Lake County homeowners who care about longevity and repairability, pavers or natural stone over a proper base outperform poured concrete over the life of the project.

What base do you need under a patio in our freeze-thaw climate?

The base is the single most important quality differentiator in northern Illinois hardscaping — and it's the part you never see once the job is done, which is exactly why it gets shortcut by cut-rate installers.

A proper patio or walkway sits on a compacted aggregate (crushed stone) base, generally 6 inches or more for patios and walkways, and deeper still for driveways and under retaining walls. The stone is installed and compacted in lifts (layers), with a thin bedding layer on top to set the pavers.

Why it matters here specifically: Lake County sits on heavy clay that holds water, and our repeated freeze-thaw cycles heave anything that isn't built on a well-drained, well-compacted stone base. A thin or skipped base is the number-one reason patios settle, heave, and go uneven within a few years. Get the base right and everything above it stays flat for decades.

Will my patio or walkway heave in Lake County winters?

A properly built patio or walkway should not heave. Heaving happens when water gets trapped under the surface, freezes, and expands — lifting pavers unevenly.

The defenses are all built in during installation: a deep, well-compacted aggregate base; proper compaction in lifts rather than one loose dump of stone; and drainage that moves water away from and out of the base so it never sits and freezes. On our clay soils, cutting corners on base depth or compaction is exactly what produces the lifted, uneven pavers you see around older North Shore properties. Built correctly, the base drains and the surface rides out the freeze-thaw cycles flat.

Do I need a permit for a patio or retaining wall?

It varies by municipality — so check with your own village before you build, and we handle the permitting for you as part of the project.

Many North Shore and Lake County villages require permits for hardscaping, especially for retaining walls above a certain height and for projects that affect impervious-surface limits or stormwater drainage. Some at-grade patios may not need a permit in certain towns, while others require review. Because the rules differ from village to village and change over time, we confirm the current requirements for your specific property and pull any permits needed — you don't have to navigate village hall yourself.

When does a retaining wall need engineering?

Generally, taller retaining walls require an engineered design and a permit. The common threshold many villages use is around 4 feet (often measured from the bottom of the footing to the top of the wall), though this varies by municipality and some towns set it lower.

Walls that hold back a surcharge — a driveway, pool, structure, or steep slope above them — can require engineering at lower heights because of the extra load. Since the exact trigger differs by village, we verify the requirement for your site and bring in a licensed engineer whenever the design calls for one.

Retaining walls — when do I actually need one, and what types are there?

You need a retaining wall when you have a grade change to hold back: to stop erosion, create usable flat space on a sloped lot, level an area for a patio or lawn, or protect a foundation from runoff. This comes up often in Lake County's ravine communities like Lake Forest and Bannockburn.

• Segmental (modular) block walls — the most common and flexible option; engineered units that stack with drainage built behind them.
• Natural boulder walls — large stone set for a more organic, naturalized look, well-suited to wooded North Shore lots.
• Poured concrete or timber walls — used for specific structural or budget situations.

The right choice depends on height, the load above, drainage, and the look you want. We match the wall system to the site rather than using one approach for everything.

What brands and materials do you use?

We build with quality manufacturers such as Unilock and Belgard for concrete pavers and segmental wall systems, along with natural stone like bluestone and flagstone for premium work. Using established manufacturers matters: their units are engineered for freeze-thaw durability and carry manufacturer warranties that off-brand products don't.

It also shows up in our estimates. When we quote a project we specify the exact product — for example, a Unilock Beacon Hill paver patio with a 6-inch compacted base and polymeric sand — so you know precisely what you're getting instead of a vague "pavers" line item. You can see examples of materials and finished work in our portfolio.

What are polymeric sand and sealing, and do I need them?

Polymeric sand is a specialized jointing sand swept into the gaps between pavers. When it's wetted it hardens, locking the units together, resisting weeds and ants, and reducing washout from rain. We use it as standard on paver patios and walkways — it's an important part of a long-lasting installation in our climate.

Sealing is optional. A sealer can enrich the paver color, make the surface easier to clean, and add stain resistance, but it needs periodic reapplication and isn't required for durability. We'll tell you whether sealing makes sense for your specific material and how you plan to use the space.

Do permeable pavers help with drainage and stormwater?

Yes. Permeable pavers are set with open joints over a special open-graded stone base that lets rainwater infiltrate into the ground instead of running off the surface. They're a strong option on the North Shore for managing stormwater, reducing pooling, and in some cases helping meet village impervious-surface or stormwater requirements.

They work best as part of a broader drainage plan for the property. If your yard also has pooling or runoff issues beyond the patio, see the drainage section of our Lake County lawn & landscape FAQ. We'll assess whether permeable pavers fit your soils and goals.

What's the best time of year to build hardscaping in northern Illinois?

Hardscaping can be built from spring through late fall in northern Illinois — roughly April through November — as long as the ground isn't frozen and the base can be properly compacted. Spring and fall are especially comfortable for the crew and the materials.

The main constraint is the ground itself: once it freezes, excavation and compaction aren't reliable, so winter installs are generally avoided. Because the North Shore build season fills up quickly, booking in late winter or early spring is the best way to secure a spot for the coming season.

How long does a paver patio last, and what's the warranty?

A properly built paver patio lasts for decades. The pavers themselves often carry a manufacturer's lifetime or multi-decade warranty against structural failure, and because individual units can be lifted and reset, the surface stays maintainable over its whole life.

The real variable is workmanship — the base and drainage determine whether the surface stays flat. We stand behind our installations with a workmanship warranty on top of the manufacturer's product warranty, and we specify both in your quote. Natural stone is similarly long-lived when it's set on a proper base.

Can you add a fire pit, outdoor kitchen, or seating wall?

Yes — fire pits, outdoor kitchens, seating walls, pillars, and integrated lighting are some of the most popular features we build into North Shore patios. They're best designed together with the patio so the materials, proportions, and base all work as one project rather than a bolt-on added later.

Gas fire features and any utility connections are coordinated with the appropriate licensed trades. Tell us how you want to use the space — entertaining, dining, a quiet fire-side corner — and we'll design the hardscape around it. There are examples in our portfolio.

How long does a typical patio project take?

A typical residential paver patio takes roughly one to two weeks of on-site work once it's underway, depending on size, site access, grading and drainage work, demolition of any existing surface, and features like walls, steps, or a fire pit.

Larger or more complex projects — extensive retaining walls, outdoor kitchens, multi-level designs — take longer. Weather and permitting timelines also affect the overall schedule. We give you a realistic timeline with your quote and keep you updated as the work progresses.

How do you handle drainage so water doesn't pool on or behind the hardscape?

Drainage is designed into every project from the start, not added as an afterthought — and in our clay-and-freeze-thaw climate it's what separates a patio that lasts from one that heaves.

On patios and walkways: we build in a slight slope (generally around a quarter inch per foot) so surface water runs off and away from the house rather than pooling on the surface.

Behind retaining walls: we install free-draining backfill stone and a perforated drain pipe so water pressure can't build up behind the wall and push it out or cause heaving.

On wet clay sites: we tie in area drains, downspout connections, or regrading as needed so water has somewhere to go. For broader yard drainage problems beyond the hardscape, see the drainage section of our Lake County lawn & landscape FAQ.