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Exposed wood framing and vaulted ceiling under construction for a home addition with large windows and skylights.

Additions & Secondary Units in London, Ontario

Expand your home intentionally, whether you’re making room for family, adding income potential, or creating space that simply works better.

Expand Without Moving

From attached additions to fully independent secondary units, we build spaces that make your current home work better for your life. Whether you’re looking to create a rental suite, build a new primary suite, or give your family more breathing room, our team will work closely with you from design through construction to make it happen seamlessly.

What's Typically Included?

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FOUNDATION & FRAMING

Excavation, pouring new footings, and framing the new structure to match your home’s architecture.

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PRIMARY BEDROOM & ENSUITE ADDITIONS

Creating luxurious suites with walk-in closets and spa-inspired bathrooms.

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SECONDARY SUITES

Separate entrances, kitchenettes, bathrooms, and fire separation to meet code for legal units.

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HVAC, PLUMBING & ELECTRICAL EXTENSIONS

Ensuring your home systems are professionally upgraded to ensure safety, efficiency, and long-term reliability.

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ATTACHED OR DETACHED GARAGE ADDITIONS

Additional garage space with or without upper-level living.

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EXTERIOR INTEGRATION

Seamless siding, roofing, and trim to blend new construction with the existing home.

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KITCHEN & BATHROOM ADDITIONS

Plumbing, fixtures, cabinetry, and finishes for expanded spaces.

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PERMIT & CODE COMPLIANCE

We manage the permits, inspections, and city requirements so your project moves forward without delays.

WHAT DO ADDITIONS & SECONDARY UNITS TYPICALLY COST?

SMALL-SCALE
ADDITIONS

Sunrooms, bump-outs, and laundry/mudroom expansions.

STARTING FROM:
$75K+

FULL-ROOM
ADDITIONS

Primary bedrooms, family rooms, and kitchen extensions.

STARTING FROM:
$125K-$200K

SECONDARY
UNITS

Separate basement or garage suites with kitchens, bathrooms, and code compliance.

STARTING FROM:
$175-$300K

*These ranges reflect average pricing across London and nearby areas.
Your quote will depend on your home's size, condition, and scope of work.

What Clients Say

"We're very happy with our kitchen reno. Coronation installed new cabinets and counters, and even helped us choose appliances. As someone in the trade, I appreciated how they worked around my schedule. They kept us informed and made the process simple. Would absolutely recommend"

– Dustin T.

LET'S TALK ABOUT YOUR HOME EXPANSION

Whether you're planning a full addition or converting your basement into a rental, we'll walk you through what's possible and what it'll take.

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Coronation Construction Inc. is a trusted renovation company in London Ontario, offering full-service residential and commercial renovations. We focus on high-quality craftsmanship, comfort, and long-term value.

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SERVICE AREAS

Serving London, Ontario and surrounding communities across Southwestern Ontario.

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Copyright © 2025 Coronation Construction Inc.

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