Most privacy complaints on a deck come from one direction: a neighbour's window, a second-storey deck next door, or a side yard that is only a few metres wide. The fix is usually a single well-placed screen, not a box around the whole deck. This guide covers the privacy wall ideas that work, what each costs, and the by-law limits that decide how tall and how close to the line you can build.
Deck privacy wall costs at a glance
| Option | What it is | Typical 2026 price |
|---|---|---|
| Pressure-treated slat or board screen | Horizontal or vertical boards on 4x4 or 6x6 posts | $90 - $130 per linear foot |
| Cedar horizontal slat wall | Tight or gapped cedar slats, clear finish or stain | $110 - $170 per linear foot |
| Aluminum-framed composite screen | Aluminum posts and channel with composite or aluminum slats | $150 - $220 per linear foot |
| Lattice panel screen | Wood or vinyl lattice in a frame, lets air through | Low end of the wood range |
| Planter boxes with hedging or grasses | Built-in planters on or beside the deck | $350 - $900 per planter |
| Pergola with a privacy side | Open roof frame with one screened side | See our pergola cost guide |
| Outdoor curtains or roll-down shades | Fabric on a rod or pergola beam | A few hundred dollars, DIY |
The wall itself is usually not the expensive part. Adding posts to an existing deck, blocking the frame so the posts do not rock, or new footings for a tall screen can add as much as the panels. A 12 ft screen along one side of a deck typically lands at roughly $1,100 to $2,600 before any structural work.
How tall can a deck privacy wall be?
In most Ontario cities a privacy screen is regulated like a fence, and a screen on a raised deck has its own rule. Here is how the three cities we work in most handle it.
| City | Privacy screen on a deck | Setbacks and limits |
|---|---|---|
| Hamilton | Up to 2.0 m measured from the deck or platform to the top of the screen | Only if it is at least 1.2 m from a side lot line (a shared party wall side excepted), at least 3.0 m from the rear lot line, and no more than 4.5 m long. Closer to the line, the normal 2.0 m fence limit applies |
| Oakville | Up to 2 m above the deck or platform | At least 0.91 m (3 ft) from any property line. Any part more than 2 m above the ground must be open lattice. No more than 9 m in one section or 12 m in total. Not permitted on townhouse lots |
| Burlington | Regulated through the zoning by-law | The general fence limit is 2.0 m. Confirm screen height and setbacks for your lot with zoning before building |
Sources: Hamilton Fence By-law 10-142, section 3(3), and Oakville Fences and Privacy Screen By-law 2002-034, section 8, and the City of Burlington fence page, checked September 2026. Hamilton's by-law defines a fence to include latticework and boards used to provide privacy, so a slat screen counts.
What that means in practice: on a typical Hamilton semi or townhouse deck that runs close to the side line, a full 2 m screen right at the edge often does not comply. Setting the screen in from the line, or keeping it short, usually solves it. On an Oakville lot, a screen that sits 3 ft in from the property line and 2 m above the deck is the common compliant design.
Deck privacy wall ideas that work
1. One targeted screen
Stand on the deck, sit down, and find where the view actually comes from. A single 8 to 12 ft section in the right spot usually blocks the problem window, costs a fraction of a full enclosure and keeps the deck feeling open.
2. Horizontal slat wall
The most requested style right now. Horizontal cedar or composite slats with a 10 to 20 mm gap give privacy from most angles while letting air and some light through. Gapped slats also load up less in wind than a solid wall.
3. Aluminum frame with composite slats
The low-maintenance version. Powder-coated aluminum posts and channels hold composite or aluminum slats that do not need staining. It matches aluminum railings and composite decking well.
4. Planter wall
Built-in planters along the deck edge, planted with tall grasses, dwarf cedar or columnar shrubs, give a softer screen. They need water, drainage holes and a liner, and a full planter is heavy, so the deck frame must be able to carry it. Our privacy plants and hedges guide lists what does well in containers and in the ground.
5. Pergola with a screened side
A pergola frame gives you posts that are already strong enough to carry a screen on one side, plus shade overhead. It is the best option when the view comes from above, such as a neighbour's second-storey window.
6. Lattice with climbing vines
The budget option. Lattice in a solid frame with clematis, climbing hydrangea or hops fills in over two or three seasons. Keep the frame solid; unframed lattice sags.
7. Fabric and roll-down shades
Outdoor curtains or roll-down shades hung from a pergola beam or a cable give privacy when you want it and can be taken down for winter. They are also a good way to test where a permanent screen should go.
8. Mixed materials
A slat screen with a built-in bench or planter at its base looks intentional and gives the screen a job beyond blocking a view. It also makes a short, compliant screen feel like a feature rather than a compromise.
Build it so it stays up
A 2 m solid screen is a sail. On a windy day it pushes hard on its posts and on whatever they are bolted to.
- Posts tied into the frame. Screen posts should be through-bolted to the rim or joists with blocking behind them, or run down to their own footing. Posts screwed to the top of the deck boards will rock loose.
- Gapped slats over solid boards. A small gap lowers the wind load and dries faster.
- Spacing. Posts at roughly 4 to 6 ft centres depending on height, material and exposure.
- Hardware. Use hot-dip galvanized or stainless fasteners rated for treated lumber.
- The existing permit. If your deck was built under a permit, adding a tall screen that changes the structure may need the city's input. Our permit guide covers deck permits in all three cities.
Talk to your neighbour first
A privacy wall faces somebody. A short conversation before building avoids complaints later, and your neighbour may prefer a particular finish on their side. Most by-law enforcement on screens starts with a neighbour complaint, not a city inspection.
Where the cheap quote is cutting
- Posts surface-mounted to decking. They loosen within a season or two.
- No setback check. Ask the builder to show the distance from the screen to each lot line on the drawing.
- Untreated or wrong fasteners. Treated lumber corrodes plain steel screws.
- Planters with no liner or drainage. Wet soil against the deck frame rots it.
- A solid wall where a gapped one would do. More wind load, more cost, slower drying.
Frequently asked questions
How much does a deck privacy wall cost?
About $90 to $220 per linear foot installed in 2026 Ontario. Pressure-treated slat screens start around $90 to $130, cedar slat walls $110 to $170 and aluminum-framed composite $150 to $220, before any extra posts or footings.
How tall can a privacy screen be on a deck in Hamilton?
Up to 2.0 m measured from the deck to the top of the screen, if it is at least 1.2 m from a side lot line, at least 3.0 m from the rear lot line and no more than 4.5 m long, under Fence By-law 10-142. Closer to the line, the normal 2.0 m fence limit applies.
How tall can a deck privacy screen be in Oakville?
Up to 2 m above the deck or platform, at least 0.91 m from any property line, with any part more than 2 m above the ground in open lattice. Screens are limited to 9 m per section and 12 m in total, and are not permitted on townhouse lots.
Do I need a permit for a deck privacy wall?
A privacy screen that meets the fence or privacy screen by-law usually does not need its own building permit. If it changes the structure of a permitted deck, or is part of a new deck that needs a permit, it goes on the drawings. Check with your city.
What is the cheapest deck privacy screen?
Outdoor curtains, roll-down shades or framed lattice with climbing vines. For a permanent built screen, pressure-treated slats are the lowest cost.
Can I attach a privacy screen to my deck railing?
Only a light one such as fabric or a short panel. A tall screen puts far more wind load on the posts than a railing is designed for, so it needs its own posts tied into the frame or footings.
What is the best material for a deck privacy wall?
Cedar slats look warm and cost mid-range but need finishing. Aluminum-framed composite costs the most and needs almost no upkeep. Pressure-treated is cheapest and takes stain well.
How do I get privacy from a neighbour's second-storey window?
A vertical screen alone rarely blocks a view from above. A pergola with slats or a shade overhead, a tall tree or a shade sail placed between you and the window works better.
- Our deck building service
- Deck cost in Ontario
- Best privacy plants and hedges for Ontario
- Fence cost in Ontario
- Landscaping permits in Hamilton, Burlington and Oakville
View coming from above? See pergola costs and ideas including a screened side.