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Paragon
When your outdoor space can’t accommodate guests, you miss out on gatherings. A home addition can provide the room you need for summer barbecues and relaxation. No more shuffling chairs—just space to host comfortably.
Consider a sunroom for quiet work or a covered area to enjoy the rain. The right addition can enhance your lifestyle and adapt to your family’s needs in this neighborhood.
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| Home Additions Westwood Plateau Addition Structural Type | Basic Specification Prices | Standard Specification Prices | Premium Specification Prices | Luxury Specification Prices |
|---|---|---|---|---|
| Home Additions | CAD 35,000 – CAD 85,000 | CAD 75,000 – CAD 160,000 | CAD 140,000 – CAD 300,000 | CAD 250,000 – CAD 550,000 |
| Second Floor Addition | CAD 140,000 – CAD 240,000 | CAD 200,000 – CAD 340,000 | CAD 280,000 – CAD 450,000 | CAD 380,000 – CAD 550,000 |
| Rear Extension | CAD 35,000 – CAD 85,000 | CAD 75,000 – CAD 160,000 | CAD 140,000 – CAD 300,000 | CAD 250,000 – CAD 550,000 |
| Side Extension | CAD 35,000 – CAD 85,000 | CAD 75,000 – CAD 160,000 | CAD 140,000 – CAD 300,000 | CAD 250,000 – CAD 550,000 |
| Garage Conversion | CAD 35,000 – CAD 75,000 | CAD 70,000 – CAD 130,000 | CAD 120,000 – CAD 200,000 | CAD 180,000 – CAD 280,000 |
Expand Your Outdoor Space
A cramped deck can make summer feel like a wait. When your outdoor space is too small for barbecues, lounging, or quiet evenings, a custom home addition in Vancouver can create the backyard you want.
We focus on exterior additions that fit with your home—like bigger decks, covered patios, or sunrooms that bring your living area outside. Each project is designed to increase usable space without getting in the way of your daily life.
In Westwood Plateau, hillside homes and large lots need outdoor areas that match the view. A small deck feels wrong when you’re surrounded by such natural beauty.
Cedar and redwood siding, steep land, and rainy winters all affect how we build additions here. We use strong materials that resist the damp weather while fitting the neighborhood’s style.
Structural Design in Westwood Plateau
For home additions in Westwood Plateau, we design structural posts and beams using pressure-treated Douglas fir or cedar. These materials are sized to handle the heavy snow loads that the area gets. We do not use untreated lumber in ground-contact areas because of the dampness that lasts from fall to spring.
Foundation systems in this area often use helical piles with concrete sono-tubes. This method drills past the topsoil and clay to reach stable glacial till. It limits soil disturbance on sloped lots and helps prevent frost heave, which is common in Metro Vancouver.
We use grooved, edge-grain cedar or high-density composite boards for decking surfaces. These are installed with hidden fasteners to create a clean look. This design allows the material to expand and contract during Westwood Plateau’s humid winters and dry summers without cupping.
A new exterior addition in Westwood Plateau must handle water well, especially during the long rainy season. We install a continuous drainage plane behind the cladding. This includes a dimpled membrane or rainscreen gap that allows moisture to escape and promotes airflow behind the siding and trim.
When attaching ledger boards to the existing house, we use a two-part flashing system. This includes a metal cap flashing tucked behind the existing building paper and a flexible self-adhered membrane lapped over the ledger. This layered approach directs water outward and helps prevent rot, which is common in coastal British Columbia.
For covered structures, we connect the new roof plane with the existing eave by keeping a minimum slope. We also use peel-and-stick underlayment as a secondary water barrier. Open-ended valleys and drip edges at the perimeter ensure quick water shedding and protect the fascia from wind-driven rain.
Permit Requirements for Home Additions
For a home in Westwood Plateau, a building permit is required before any enlargement or alteration of an existing dwelling, including home additions like new rooms, expanded floor area, or attached structures. The City states that a building permit must be obtained before the excavation, erection, enlargement, alteration, removal, damage repair, or demolition of any building or structure. This means Paragon Exteriors’ home-addition projects must be reviewed and approved by Coquitlam’s Building Division before work begins. Coquitlam’s guidance for additions to single-family and two-family homes specifies permit requirements and submission standards for home additions, including in Westwood Plateau. Applicants must provide complete construction drawings (typically 24″ x 36″ at 1/4″=1′), a site plan, a current land title document, a survey by a BC Land Surveyor showing all structures and topographic features, and letters of assurance from a professional engineer where structural engineering is required. Additional permits from Technical Safety BC are needed for any new or modified electrical and gas systems, and plumbing permits are required where new plumbing fixtures or system changes are involved. Permit fees are based on construction value, with part payable at application and the rest on issuance. Coquitlam’s Building Division states that building and plumbing permits are required for all new construction and for alterations to existing construction, which includes home additions in Westwood Plateau. Any exterior addition that alters the structure, such as adding new enclosed living space, significantly modifying exterior walls, or changing the building footprint, requires a building permit. Any plumbing work, such as adding bathrooms or relocating plumbing lines in the addition, requires a plumbing permit. Homeowners must contact the Planning and Development Department with the legal description and address to confirm specific permit needs and arrange inspections, which are typically conducted on weekdays during set hours.
