We are a trusted deck builder in Toronto, Richmond Hill, Markham, and other nearby areas.
Your backyard can reveal more about your future deck than any sketch can. During a Markham site visit, a contractor studies the space before design decisions are made, from drainage and grading to sunlight, access, privacy, utilities, and how your family plans to use the deck. These early checks help prevent permit delays, structural problems, comfort issues, and costly changes once construction begins. This guide explains what a deck contractor looks for during a backyard visit and how each detail shapes a safer, smarter, and more practical project plan.
During a typical Markham backyard site visit, we check soil conditions, drainage patterns, sun exposure, property lines, underground utilities, and how you plan to use the space. Some factors are obvious, like ensuring material access. Others are easy to miss, such as tree root systems that could shift footings over time or areas where snow accumulates in winter.
Key Takeaways
- A proper site visit examines drainage, sunlight, access, utilities, and soil conditions to plan a deck that works with your property
- Experienced contractors identify potential problems early, from underground hazards to future maintenance issues, saving time and money
- Understanding your yard’s unique features helps contractors design a deck that fits your space, budget, and intended use
Site Assessment Fundamentals
Before starting any deck project, we need to understand exactly what we’re working with on your property. A site assessment covers legal requirements like property lines and physical factors such as soil quality and water drainage.
Property Boundaries and Setbacks
We start by identifying your property boundaries because building too close can create legal problems. In Markham, decks typically need to maintain specific distances from property lines, and these setback requirements vary based on zoning.
We look for property markers or survey stakes. If they’re not visible, we reference your property survey or arrange for new stakes. This protects you from neighbour disputes and ensures compliance with setback rules.
Most residential zones in Markham require decks to be at least 0.6 metres (about 2 feet) from side property lines and 7.5 metres from the front lot line. Rear yard setbacks depend on your specific zone. We measure these distances carefully because even small errors can cause issues during inspection.
Permitting and Zoning in Markham
Markham requires building permits for most deck projects, especially those over a certain height or size. Your property’s zoning designation affects what and where we can build.
The City of Markham has specific rules about deck height, lot coverage, and structural requirements. Decks attached to your home and elevated more than 600 millimetres (about 24 inches) from grade almost always need permits. We also check whether your deck will exceed the maximum lot coverage percentage allowed in your zone.
During the site visit, we note any factors that might affect permit approval, such as proximity to utilities, easements, or heritage designations.
Soil and Drainage Considerations
Ground conditions directly affect how we build your deck’s foundation. We examine the soil type because clay, sand, and rocky soil each require different footing approaches.
Water drainage is critical. We observe how water flows during rain and where it collects. Poor drainage can undermine footings, cause frost heaving, and rot deck posts over time. We identify slopes, low spots, or areas where water pools.
We also check the frost line depth for your area. In Markham, footings must extend below the frost line (typically 1.2 metres or about 4 feet deep) to prevent movement during freeze-thaw cycles. If your soil drains poorly, we might recommend gravel backfill around footings or adjustments to post placement.
Evaluating Existing Structures
We assess what’s already in your backyard. The condition of existing footings, foundations, and nearby structures like retaining walls or fences can affect how we design and build your new deck.
Reviewing Deck Footings and Foundations
We check if your existing deck has proper footings that extend below the frost line. In Markham, that means at least 4 feet deep to prevent frost heave.
We look for cracks, settling, or shifting in concrete footings. These issues indicate whether soil conditions are stable or if drainage problems need attention. Footings should sit on undisturbed soil or a gravel base, not loose fill.
Common problems we find:
- Deck posts sitting directly on concrete pads without proper brackets
- Shallow footings that have shifted over time
- Missing or deteriorated post-to-footing connections
- Water pooling around foundation areas
We also check how the existing deck attaches to your house. The ledger board needs proper flashing and fasteners to prevent water damage and structural failure. If replacing an old deck, we inspect the rim joist for rot or damage before attaching anything new.
Inspecting Retaining Walls and Fences
Retaining walls near the deck area affect drainage and soil stability. We check for bulging, leaning, or cracks that signal the wall is failing. A compromised retaining wall can undermine deck footings or cause water problems.
We measure the distance between existing fences and the proposed deck location to plan access for equipment and ensure compliance with property line setbacks required by Markham bylaws.
Wooden fences or walls showing rot need replacement before building nearby. We also note if any structures will block sunlight or create ventilation issues that could affect your deck’s longevity.
Backyard Layout and Access
We walk the entire property to understand how your yard functions and where a deck will fit best. The way your backyard connects to your home and how people move through the space directly impacts the deck’s design, size, and placement.
Space Planning for Deck Size and Shape
We measure yard dimensions and note obstacles that affect deck placement. Trees, gardens, utility boxes, air conditioners, and underground services all influence where we can build. We also check property lines to ensure your deck stays within legal boundaries and meets setback requirements.
The slope of your yard matters. A steep grade means we’ll need taller posts and more structural support, which impacts cost and design options. We look for relatively level areas that minimize the need for grading or tall support structures.
We consider sunlight patterns and wind exposure. A deck in afternoon shade might need different materials than one in full sun. Existing landscaping often guides the deck’s footprint, and we work around mature trees or gardens you want to keep.
Assessing Entry Points and Traffic Flow
We examine all doors leading to your backyard to determine the best deck access point. The deck height needs to align with your door threshold, typically within a step or two. Building codes require specific landing sizes at doors, so we factor this into the initial layout.
We also walk the natural paths people take through your yard. If kids run to a play area or you frequently access a shed or garage, the deck layout should work with these movement patterns. We note narrow side yards or tight gates that could complicate material delivery. If we can’t fit lumber through a standard gate, we plan for front yard delivery or crane access, which adds time and cost.
Grading and Slope Analysis
When we arrive at your property, we assess how water moves across your yard. The slope and grading directly affect your deck’s longevity and your home’s foundation.
Here’s what we check:
- Current slope direction and steepness
- Distance between your house and the proposed deck location
- How water drains during heavy rain
- Whether the yard pitch is consistent or has low spots
We want water flowing away from your house. Ideally, we look for about 2% slope (roughly 1/4 inch per foot) moving water in the right direction. If your lot doesn’t have proper drainage, we factor that into the deck design or recommend addressing it before building.
On steeper properties, we determine if cut and fill work is needed to create a stable, level area for footings. Grading differences between houses in Markham subdivisions can vary, even on the same street.
We also check if the soil has been properly compacted. Loose or uneven soil can cause footings to settle unevenly, leading to structural problems. If we spot grading issues, we’ll let you know if it’s something we can handle or if a grading specialist is needed.
Sunlight and Shade Evaluation
We track the sun’s path across your yard during every site visit. Sun exposure is a key factor in determining how much you’ll use your deck.
The sun moves differently throughout the day and across seasons. We note which areas get direct afternoon sun and where natural shade exists from your house, trees, or neighbouring structures.
We’re looking at:
- Morning vs. afternoon sun exposure
- Shade patterns from existing trees and buildings
- How the sun angle changes between summer and winter
- Areas that might need added shade solutions later
This evaluation helps us recommend the best deck placement and orientation. Sometimes shifting a deck plan by a few metres makes a significant difference in comfort.
We also consider Markham’s planning requirements. If your property needs a sun and shadow study for permits, we’ll flag that early in the process.
Trees provide natural cooling, but we need to check their health and proximity. A large tree might offer good shade now, but if it’s too close to your planned deck location, its roots could cause future problems.
We’ll discuss shade options if your yard gets intense sun exposure. This might include built-in pergolas, spots for future shade sails, or positioning the deck to use your home’s shadow.
Neighbour and Privacy Concerns
A deck contractor checks how your new deck might affect your neighbours’ privacy and whether it could create sightlines into their yards, windows, or outdoor spaces. We also look at where privacy screens can go and whether they’ll trigger bylaw issues with height limits.
Considering Views from Adjacent Lots
We walk your property line and look at what your deck will see. This means checking if the deck sits high enough to view into your neighbour’s windows or yard. Many complaints about decks in Markham stem from privacy concerns.
We measure the elevation difference between your yard and theirs. A deck that sits two feet above grade usually does not cause issues. A second-storey deck or raised platform can create direct sightlines that may upset neighbours and lead to municipal complaints.
We also note where your neighbours spend time outside. If their patio is close to your proposed deck, we flag it. You might need to angle the deck, add privacy features, or adjust the layout.
Privacy Screen Placement
Privacy screens can address neighbour concerns, but placement is regulated. We check if adding a screen will push your deck over Markham’s height restrictions. Screens attached to the deck structure count toward total height, so a 600mm high deck with a 1.8m privacy screen might exceed limits.
We look at setback requirements as well. A screen at the property line might violate side yard setbacks even if the deck itself is compliant. We measure these distances during the site visit so you know what’s allowed.
Some privacy screens need separate permits depending on their construction. Freestanding screens may fall under fence bylaws instead of deck regulations, which changes what you can build and where.
Material Selection Guidance
During a site visit, we evaluate which materials will work for your property’s conditions and your intended use of the space. The right decking and railing choice depends on your budget, desired maintenance level, and how Markham’s weather will affect different products over time.
Comparing Pressure-Treated Wood, Composite, and Hardwood
Pressure-treated wood costs the least upfront, usually running $8 to $15 per square foot installed. It needs annual staining or sealing to prevent rot and splintering, especially with humid summers and freeze-thaw cycles. Drainage patterns are checked during the site visit because pooling water destroys treated lumber faster than anything else.
Composite decking runs $18 to $35 per square foot and requires minimal maintenance beyond occasional washing. Sun exposure is assessed during the visit since darker composite colours absorb more heat and can get hot in direct sun. Some composites also expand and contract more than wood, so joist spacing is measured carefully.
Hardwoods like cedar or ipe fall somewhere in the middle at $15 to $40 per square foot. Cedar resists insects naturally and ages to a silver-grey colour without treatment. Ipe lasts over 40 years but costs more and requires pre-drilling for every screw. Timeline is considered since composite ships faster than special-order hardwood.
Choosing Railings and Hardware
Railing materials are matched to your deck surface and maintenance preferences during the site visit. Aluminum railings do not rust and work well with both wood and composite decks. Composite railings match composite decking but can feel less rigid than metal. Vinyl railings cost less but can crack in extreme cold.
Glass panels and metal screens affect wind flow and privacy, so sightlines to neighbouring properties and prevailing wind direction are checked. Stainless steel hardware costs more than coated screws but will not stain composite boards with rust streaks over time.
Utilities and Potential Hazards
Before any deck project begins, it is important to know exactly what is buried beneath your yard and what hazards exist above or around the build site. Underground utility lines and overhead obstacles can complicate the process if not identified early.
Locating Gas, Hydro, and Water Lines
Ontario One Call is contacted before any excavation work. This free service marks the location of gas lines, electrical cables, water mains, and telecommunication lines within a few days.
Gas lines are a significant safety concern. They typically run 18 to 24 inches below ground, which is where deck footings are often dug. These locations are marked carefully, and footing placement is adjusted to maintain safe clearances.
Hydro lines and water pipes also affect where digging can occur and how the deck’s support structure is designed. If utility lines run directly through the planned deck area, it may be necessary to relocate footings or redesign the deck layout. Sometimes the local utility company needs to move lines, which can add time and cost.
All utility locations are documented with photos and measurements during the site visit. This information helps create accurate plans and avoid delays once construction starts.
Identifying Overhead Wires and Tree Roots
Overhead power lines require specific clearance distances from the deck. At least 3 metres of clearance from deck surfaces and railings to overhead hydro lines is needed for safety.
If wires run too close to the proposed deck location, the design is adjusted or the utility company is contacted about line relocation. Use of the deck is also considered, as carrying long objects near power lines creates additional safety risks.
Tree roots can interfere with footing installation and may continue growing after construction, potentially shifting or lifting deck posts. Major trees within 3 to 5 metres of the deck site are identified and their root systems assessed.
Trimming specific roots during construction or adjusting post locations to avoid root zones may be recommended. Cutting too many roots can harm or destabilize trees, so deck stability and tree health are balanced.
Accessibility and Safety Planning
During the site visit, how people will move around and use the deck safely is assessed. This includes considering who needs access and what features will make the space functional for everyone.
If anyone in the household uses mobility aids like wheelchairs or walkers, or if there are aging family members or guests, these needs are factored into design recommendations. Wide pathways, level transitions, and proper railing heights are considered.
The Ontario building code sets minimum safety standards, but additional measures are often suggested. Doorway widths, grade changes, and the need for ramps instead of stairs are evaluated. Non-slip surfaces are recommended, especially in areas that get wet or shaded.
Key areas evaluated:
- Entry and exit points from the house
- Clear pathway widths (minimum 36 inches for wheelchair access)
- Ground-level transitions and potential trip hazards
- Railing strength and spacing requirements
- Lighting needs for evening use
- Future accessibility considerations
Obstacles such as tree roots, slopes, or drainage issues that could affect safe deck placement are noted. Sometimes adjusting the deck location by a few feet can improve accessibility.
Decks are designed to remain functional as needs change over time. An accessible deck adds value and helps ensure everyone can use the outdoor space comfortably and safely.
Future Expansion Possibilities
The yard is assessed with future needs in mind. A deck that works today might need to grow with your family or lifestyle.
During the site visit, available space around the proposed deck area is noted, and obstacles that might block future additions are identified. Sometimes the foundation can be planned to support extra sections later.
Key factors assessed for future growth:
- Available yard space adjacent to the initial deck
- Existing footing locations that could be reused
- Soil conditions in potential expansion zones
- Access points for construction equipment
- Property line setbacks and local permit requirements
How an addition would connect to the current design is also considered. If the original deck is built with expansion in mind, footings can be reused and new joists tied into the existing frame.
The home’s layout is reviewed, paying attention to door locations and traffic flow to determine where a future expansion makes the most sense. For example, a small dining deck now could be expanded to add a lounging area later.
All observations about expansion potential are documented in site notes. This provides options to start with a basic platform and add features such as elevated sections, stairs, or a pergola when the budget allows.
Frequently Asked Questions
Homeowners often want to know what gets checked during a site visit and why those details matter. These answers explain the main points in simple terms.
What measurements and layout details are taken during the initial backyard walkaround?
The contractor measures the yard, deck area, distance to property lines, door threshold height, and nearby obstacles such as trees, fences, gardens, sheds, and utility boxes. These details help determine deck size, shape, height, stair placement, and how the layout will fit your yard.
How are ground conditions and drainage assessed before recommending footings or helical piles?
The contractor checks soil type, slope, soft areas, and where water collects after rain. Clay, loose fill, or wet ground may need a stronger footing approach. If drainage is poor, the plan may include deeper footings, gravel, helical piles, or layout changes.
What property features can limit deck size or placement, such as easements, setbacks, or utilities?
Setbacks, easements, buried utilities, mature trees, retaining walls, fences, and grading can all affect where a deck can go. The contractor checks these items early so the design follows Markham requirements and avoids conflicts with property lines or service access.
How is the new deck tied into the house, including the ledger connection and door threshold height?
The wall, framing, siding, flashing area, and door height are reviewed before a ledger connection is planned. The deck surface must sit at a safe height below the door threshold, while the ledger must connect securely to solid house framing.
What access issues affect the build, such as getting materials to the backyard without damaging the lawn or fences?
The contractor checks gates, side yards, walkways, steps, slopes, air conditioning units, and other obstacles between the street and backyard. If access is tight, the plan may include temporary fence removal, protected paths, smaller deliveries, or careful material handling.
What questions do you ask homeowners about how they plan to use the deck, like seating, privacy, shade, and BBQ placement?
Homeowners are asked how they want to use the deck, how many people they entertain, and whether they need space for dining, lounging, cooking, shade, or privacy. BBQ placement is also discussed so clearances, traffic flow, and possible gas access can be planned properly.