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Paragon
You picture the new space but can’t stop thinking about how the cladding will meet the old. Mismatched siding or a jarring window style hurts the whole street view. It turns what should be exciting into a worry about resale value.
Consider a main-floor bedroom for accessibility or a dedicated office with its own entrance. These projects must account for our damp winters while ensuring they blend seamlessly with the existing exterior.
We’re eager to chat! Drop us a line for all your exterior needs.
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| Home Additions Delta Addition Type | Basic Finish Prices | Standard Finish Prices | Premium Finish Prices | Luxury Finish 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 150,000 – CAD 260,000 | CAD 220,000 – CAD 380,000 | CAD 320,000 – CAD 520,000 | CAD 450,000 – CAD 750,000 |
| 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 85,000 | CAD 75,000 – CAD 160,000 | CAD 140,000 – CAD 300,000 | CAD 180,000 – CAD 320,000 |
Cohesive Home Additions
If you need more space but don’t want an addition that looks out of place, we can help. Our method makes sure the new exterior fits well with your current siding, trim, and windows from the start, especially for home additions in Vancouver.
We match siding styles, window designs, and paint colors so the addition looks like it was always there. This creates a unified appearance that improves curb appeal without making the new section stand out too much.
In Delta, the rainy weather and coastal air put extra stress on exterior materials. An addition that doesn’t drain moisture well can cause rot or warping, so choosing the right materials and proper installation is important.
We often use fiber cement siding and moisture-resistant trim for Delta additions to withstand the wet winters. Matching the existing exterior paint also helps protect against UV fading during sunny summers.
Water Management Techniques
Building an addition in Delta starts with framing tied into the existing structure. The exterior finish is where water management matters most. We sheath the new walls with plywood or OSB. Then, we wrap them with a weather-resistant barrier that lets moisture vapor escape while blocking liquid water. Over that, we fasten vertical pressure-treated strapping to create a ventilated rainscreen gap. This gap is critical in Delta’s rainy winters, allowing any incidental water to drain freely and dry behind the siding.
For siding, we match the existing home’s profile. We often recommend fiber cement lap or panel products because they resist rot and swelling in coastal humidity. Trim around windows, doors, and corners is usually PVC or cellular PVC, which won’t absorb moisture like wood. All fasteners are stainless steel or hot-dipped galvanized to prevent rust streaks. We also install kickout flashings at roof-wall intersections to direct water away from the addition’s base.
The transition between old and new siding gets a metal or PVC Z-flashing tucked behind the existing siding and lapped over the new. We add a sealant bead behind the flashing leg. This detail prevents water from getting trapped at the joint, a common failure point on Delta homes exposed to wind-driven rain. We apply exterior paint after caulking all joints, using high-quality acrylic latex that can handle UV exposure without fading or peeling prematurely.
Every home addition in Delta must maintain a continuous drainage plane across the entire exterior. We treat the joint between the existing house and the new addition as a critical control layer. A self-adhered flashing membrane bridges the sheathing gap, lapped shingle-style so water always flows outward and downward. This membrane ties into the existing weather-resistant barrier, ensuring no break in protection against Delta’s frequent wind-driven rain.
The wall assembly is designed to dry to the exterior. A ventilated rainscreen gap behind the siding allows moisture that gets past the cladding to evaporate and drain out through weep holes at the bottom. In Delta’s humid winters, this prevents condensation from building up within the wall cavity. We also detail the base of the addition with a through-wall flashing that directs any water in the rainscreen out over the foundation, keeping the sill plate dry.
Structural attachment is equally important. The addition’s walls are anchored to the existing framing with metal straps and bolts that resist uplift during coastal windstorms. All exterior penetrations—vent hoods, hose bibs, and exterior outlets—get pre-formed flashing boots integrated into the weather-resistant barrier before siding goes on, so the envelope stays intact. This approach ensures the addition’s exterior performs as a unified, water-shedding assembly.
Delta Home Addition Permits
For a home addition that changes or enlarges the exterior of a single-detached or duplex dwelling in Delta, the City requires a building permit for a Residential Exterior Addition. You must submit the permit application online via DeltaOnline and upload plans to the ePlan portal for review. Paper or email applications are not accepted.
Residential home additions in Delta, including new construction, renovations, and additions to existing dwellings, must get a building permit through the City’s two-step online process. Applicants need to complete the building permit application on DeltaOnline, pay the application fee, and upload required plans to the ePlan portal before any review or construction work begins.
Delta’s Noise Control Bylaw limits construction and alteration work on buildings, including home additions, to 7:00 a.m.–7:00 p.m. Monday to Friday, and 9:00 a.m.–5:00 p.m. on Saturday. It prohibits such work at any time on Sundays and holidays unless you get special written permission from the City. Exterior remodeling contractors doing home additions in Delta must schedule noisy work within these hours or get written permission for exceptions.
