A patio is the most-used structure in many backyards and one of the hardest to change once it is down. Moving a few square feet of concrete is a demolition job, so the planning stage is where most of the value lies. The questions are the same whether you build it yourself or hire a contractor: where should it go, how big should it be, what surface suits your budget and climate, and how will water drain away. This guide works through each, drawing on landscape guidance from the University of California and University of Florida extension services. Base depths and installation details vary with soil, climate and product, so the manufacturer’s instructions and local building codes take priority.

Before any digging: request a utility locate through 811 a few business days ahead (it is free), check local permit and setback rules, and plan the patio to slope away from the house.

Step 1: Decide what the patio is for

Start with use, not material. University of California Agriculture and Natural Resources (UC ANR) recommends estimating how many people will regularly use a gathering area, since that sets its size. Common patio uses:

  • Outdoor dining for the household, or for guests.
  • Lounging with sofas or lounge chairs.
  • A grill or outdoor kitchen.
  • A fire pit area.
  • A combination, often as two connected zones.

List the furniture each use needs. That list becomes the minimum footprint.

Step 2: Choose the location

Most patios sit off the back door, which makes carrying food and furniture easy. A detached patio at the far end of the yard can work as a retreat, with a path linking it to the house. Whichever you choose, check:

  • Sun and shade at the times you will use it. University of Florida IFAS Extension recommends mapping sun, shade and wind on a base plan, since they create microclimates around the yard.
  • Grade. Level ground keeps costs down. A slope means cut and fill, steps or retaining walls.
  • Drainage. Note where water flows and pools after rain. A patio must not direct water toward the house foundation or a neighbour’s yard.
  • Utilities. Buried lines, septic systems and the AC unit all limit placement. The national 811 service notes that some utilities are buried just inches below the surface and that shovels are the second most common tool involved when buried utilities are damaged.
  • Trees. Roots can lift paving, and digging a base can damage roots. Keep a patio outside the main root zone of trees you want to keep.

Step 3: Size it

UC ANR suggests measuring a room in your house that feels comfortable for the same group and using it as a guide. Then:

  1. Set out the furniture you plan to use, or mark its footprint, on the ground.
  2. Add space to walk around it and to pull chairs back from a table.
  3. Add space for a grill, with clearance from the house and railings that NFPA advises.
  4. Outline the shape with a garden hose or stakes and string and leave it for a few days. Walk through it and sit in it.

Bare ground looks bigger than a furnished patio feels. If budget allows, it is usually easier to live with a patio that is slightly larger than one that is slightly small.

Step 4: Compare surfaces

UC ANR’s general rule: more construction steps mean higher cost but greater durability, and labour often costs more than materials. Its comparison, with common characteristics added:

Surface Relative cost and install Durability and maintenance
Decomposed granite or gravel Inexpensive; easier to install Harder to maintain (UC ANR): needs raking and top-ups; can track indoors; uneven for some furniture
Poured concrete Moderate cost; requires skill to install (UC ANR) Low maintenance (UC ANR); can crack with ground movement; can be stamped or coloured
Concrete pavers Moderate; DIY-friendly on a flexible base Individual units can be lifted and reset; joints need sand top-ups and weeding
Brick or natural stone pavers Very expensive over a concrete base; less over a flexible base (UC ANR) Durable over concrete; over a flexible base such as base rock, less durable and more maintenance (UC ANR)

UC ANR also notes that smoother surfaces are easier to maintain and better for running children and people with limited mobility, while formal designs suit geometric shapes and hard edges and natural designs suit curves and irregular stone. Let the house’s style guide the choice; bringing material samples home helps check colour and texture against the house.

Step 5: Plan drainage and the base

A patio is only as good as what lies under it. Whatever the surface, the general sequence is: excavate, compact the soil, build a compacted granular base, add a bedding layer suited to the surface, then install the surface and edge restraint. Base depth and materials depend on soil type, frost depth and the product, so follow the paver or concrete manufacturer’s specifications and local code.

Plan a gentle slope away from the house so rain runs off rather than pooling or flowing toward the foundation. Where runoff is a problem, permeable pavers or gravel let water soak into the ground instead of running off. For larger slopes, grading and drainage work may need a professional.

Step 6: Check rules and permits

  • Utility locate: 811 asks you to contact them a few business days before any digging and to wait until all utilities have responded and marked their lines. Dig carefully around marks, and consider relocating a project that sits close to buried utilities.
  • Permits: many areas require permits for patios above a certain size or height, roofed structures and electrical work. Ask your local building department.
  • Setbacks and easements: paving may not be allowed near property lines or over utility easements.
  • HOA rules: associations often control materials and placement.

Step 7: Plan for what goes on and around it

  • Power and lighting: run conduit for outlets and lights before paving.
  • Shade: footings for a pergola or umbrella sleeves are easier to install with the base. See pergolas and shade.
  • Fire pit: the Seattle Fire Department advises placing portable fire pits on a non-combustible surface such as patio blocks or concrete, at least five feet from the house and anything that can burn. See fire pits.
  • Planting: beds or planters around the edge soften hard surfaces. UF/IFAS advises keeping plants from touching the house.

DIY or hire a pro?

A small gravel or paver patio on level ground is a common DIY project. Poured concrete, large or sloped sites, roofed structures and anything needing a permit or electrical work usually call for a contractor. If you hire one, confirm they will contact 811, pull any permits, and specify the base depth and slope in writing.

For how a patio fits into the wider yard, see backyard design and backyard layouts. Decks are covered in backyard decks, more patio guides in backyard patios, and all structures under backyard structures.

Sources