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Home Additions Coquitlam

Quality Home Additions In Coquitlam

Your Coquitlam home addition looks mismatched and unattractive.

Our team in Coquitlam designs home additions that blend perfectly with your existing exterior.
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Premium Quality

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Paragon

Home additions that clash with your style

When a home addition doesn’t match the existing siding and trim, it feels like an afterthought. This visual break can make even a well-built project seem like a poor investment. In this area, where homes often showcase unique architectural details, the contrast is especially glaring.

Durability is just as important as aesthetics. You need the new space to withstand West Coast rain and wind without constant upkeep. We prioritize exterior materials and installation techniques that protect the structure and minimize maintenance for years.

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Estimated Costs for Home Additions in Coquitlam
This pricing matrix outlines expected cost ranges for home additions in Coquitlam. The rows categorize projects by addition type, while the columns detail pricing across each finish specification tier. Homeowners can find their estimated project cost by identifying where their preferred addition style intersects with their chosen interior and exterior finish level.
Home Addition Costs in Coquitlam
Home Additions Coquitlam Addition TypeBasic Finish PricesMid-Range Finish PricesPremium Finish PricesLuxury Finish Prices
Full Home AdditionsCAD 180,000 – CAD 320,000CAD 300,000 – CAD 520,000CAD 480,000 – CAD 800,000CAD 750,000 – CAD 1,350,000
Second Storey AdditionsCAD 160,000 – CAD 280,000CAD 260,000 – CAD 450,000CAD 420,000 – CAD 700,000CAD 650,000 – CAD 1,150,000
Rear Home AdditionsCAD 75,000 – CAD 150,000CAD 140,000 – CAD 280,000CAD 260,000 – CAD 480,000CAD 450,000 – CAD 850,000
Standard Home AdditionsCAD 70,000 – CAD 140,000CAD 130,000 – CAD 260,000CAD 240,000 – CAD 450,000CAD 420,000 – CAD 800,000
Rear Ground-Floor AdditionsCAD 60,000 – CAD 120,000CAD 110,000 – CAD 220,000CAD 200,000 – CAD 380,000CAD 350,000 – CAD 650,000
These prices are estimates based on general market knowledge and reflect typical market ranges at the time of publication. Actual contractor quotes in Coquitlam can vary depending on specific job requirements, structural conditions, site preparation, and project timing.

Cohesive Exterior Additions

A poorly planned addition can make your home look mismatched. Our team focuses on keeping the exterior consistent, ensuring every new line and surface fits with the original design.

We match existing siding materials, window styles, and paint finishes carefully. For home additions in Vancouver, we use the same careful process to make sure your property looks cohesive from the curb.

Built for Coquitlam's Weather

Coquitlam’s wet climate needs exterior work that can handle heavy rain. When adding a room, the area where old and new siding meet is a key weak point.

We find materials that match the cedar, fibre cement, or stucco common in Coquitlam. Proper flashing and housewrap keep your Coquitlam addition watertight and looking seamless.

Weathertight Addition Techniques

Where the new wall meets the old, we remove the existing siding to expose the sheathing. Then, we install a new weather-resistive barrier. This barrier overlaps the old one in a shingle-lap pattern. This way, any water that gets through the cladding drains downward without reaching the structure.

Coquitlam’s long wet periods require us to use a drainage mat or furring strips behind the new cladding. This air gap helps the wall cavity dry quickly. It prevents trapped moisture from causing rot in the sheathing.

We apply self-adhered flashing at all window and door openings. This flashing is taped in a way that directs water to the outside. We match the original siding profile and fastener schedule using corrosion-resistant fasteners that work well in the damp coastal air. This makes the addition’s exterior look original.

Effective Drainage Solutions

A continuous drainage plane behind the cladding is very important. We overlap the new weather barrier over the existing one to ensure water flows down and out, even where different framing planes or materials meet.

In Coquitlam’s wind-driven rain, flashings at window heads and the base of walls must have end dams and kickout diverters. These features stop water from moving sideways into the wall cavity during storms and direct it safely outside.

We design fastener patterns to handle higher wind loads on exposed hillside lots. We use stainless steel or hot-dipped galvanized fasteners and increase the number of fasteners at panel edges and corners. This keeps the cladding tight and helps prevent water intrusion over many years of wet weather.

Coquitlam Building Permit Requirements

In Coquitlam, you must get a building permit before any enlargement or addition to a building. This includes home additions that expand floor area or change structural elements. It applies to exterior remodeling that increases the building footprint, adds new rooms, or changes the size or structure of the home.

You need a building permit to add or remove floor area from an existing building, build a new deck or balcony, and attach a roof structure like a patio roof or awning to an existing building. These rules affect home additions that add conditioned space, covered outdoor areas, or new elevated decks as part of exterior remodeling work.

Coquitlam’s guide for additions to single-family and two-family dwellings sets specific requirements for permits. This includes professionally prepared drawings like a site plan showing all buildings and the area of the addition, foundation plan, existing and proposed floor plans, roof plan, and elevations. You must also comply with the current BC Building Code and all applicable City of Coquitlam bylaws. Existing interconnected parts of the home may need upgrades when an addition is built.