Home Addition Service in King City

– Quality Expansions That Fit Your Lifestyle

With 17+ years of building expertise, we provide reliable, high-quality home addition services in King City. From second-storey builds to sunrooms, garage conversions, and room extensions, our additions are made to elevate comfort, space, and resale value.

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Build More Room to Live With Expert Home Additions in King City

At Loon Renovation, We deliver high-quality home additions in King City, including second-storey expansions, room extensions, garage conversions, and sunrooms. Every project includes structural engineering, load-bearing analysis, HVAC planning, and code-compliant framing.

Our additions blend perfectly with your existing foundation, roofline, and finishes. With deep knowledge of King Township bylaws and OBC standards, we build faster, safer, and better than most local contractors.

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Complete Home Addition Solutions We Provide in King City Homes

We design and build full-service home additions in King City, from second-storey builds to basement conversions, engineered for comfort, safety, and resale value. We offer:

Full Home Additions & Renovations

Our complete home additions cover everything from slab prep and framing to plumbing rough-ins and electrical layout. We expand both laterally and vertically, creating smooth transitions between new and existing spaces. Ideal for homeowners needing full remodels, in-law suites, or layout reconfigurations, done right, start to finish.

Sunroom Additions

Add a four-season sunroom with high-performance thermal windows, vapour barriers, and radiant heat flooring. We design bright, insulated spaces that connect indoor comfort with outdoor views. Whether you want a relaxing reading nook or an entertainment area, we build sunrooms in King City that are warm in winter and cool in summer.

Second-Storey Additions

Second-storey additions offer high square footage without increasing your footprint. We handle load calculations, truss modification, and permit approval to extend your home vertically with bedrooms, en-suites, or private offices. Our team ensures the new level integrates cleanly with your roofline, siding, and HVAC system.

Room Additions

Add functional space with bedroom, kitchen, or family room extensions that don’t feel like add-ons. We handle structural tie-ins, electrical rewiring, and custom layout planning. Our King City room additions improve day-to-day flow while maintaining visual and functional harmony with your existing interior.

Home Office Additions

Create a distraction-free home office with acoustic insulation, daylight exposure, and built-in tech support. We build fully enclosed, ergonomic workspaces in King City homes, ideal for remote professionals, small business owners, and hybrid workers looking to boost productivity without leaving the house.

Basement & Attic Conversions

Transform dark, underused basements and attics into livable square footage. We take care of underpinning, insulation upgrades, egress compliance, and moisture protection to convert these areas into legal bedrooms, gyms, or rental-ready suites, safe, warm, and fully finished to code.

Custom Addition Design

No two properties in King City are alike, and neither are our addition designs. We create custom-built expansions that align with your home’s architecture, roof slope, window style, and material palette. Everything from layout to finishes is coordinated for seamless integration and long-term performance.

Why King City Residents Rely on Us For Home Addition Services

We’re a trusted name for residential renovation and home additions in King City, serving homeowners across King City and York Region. Here’s what makes homeowners choose us:

With over 17 years in the industry and 900+ successful additions, we understand King City’s architectural styles, seasonal impacts, and municipal building codes. From permit approvals to structural tie-ins, we bring insight that most general contractors can’t match locally.

All projects carry up to $5 million in liability coverage, protecting your property from the first shovel to final trim. We follow Ontario’s construction safety laws closely, keeping your home and investment fully secure during every phase of the build.

Our King City-based crew includes licensed tradespeople, engineers, framers, and finishers. We follow the Ontario Building Code and municipal zoning laws to the letter. Every part of your addition is built to last, function safely, and pass inspections the first time.

No mismatched bricks or awkward transitions here. We study your home’s existing structure and materials to create seamless design continuity, matching roof pitches, siding, trims, and layout flow so the new space blends in naturally inside and out.

Our quotes are fully itemized and easy to understand. We break down permits, materials, labour, and contingencies up front. No inflated costs, vague allowances, or last-minute markups, just honest pricing King City clients can plan around confidently.

We set clear timelines and manage all trades to stay on schedule. Our proven process avoids delays, miscommunication, and cost overruns. King City homeowners rely on us because we finish what we start, on time and within your budget.

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Our Streamlined Process for King City Additions

We visit your King City property, discuss your goals, and draft plans with timelines and cost ranges.

Our team handles all site work, from permits and excavation to framing, plumbing, and clean-up, with constant updates along the way.

Once complete, we walk through every detail with you and fix anything needed. Our workmanship is backed by a guarantee.

Our Home Addition Projects

Signs You Might Need a Home Addition

Cramped interiors, outdated layouts, or rising energy bills in your King City home? These common signs signal it’s time for a structural or space upgrade.

Layout Feels Dated

Closed floor plans and narrow hallways limit modern function. A strategic addition can open living areas, improve natural lighting, and update traffic flow without compromising the structure. It's a smart way to modernize older King City homes while preserving their character and charm.

Running Out of Room

Need space for a growing family, a new baby, or multigenerational living? A home addition creates flexible square footage, like extra bedrooms, home gyms, or extended kitchens ,without the cost and hassle of relocating in King City’s tight real estate market.

Visible Damage

Wall cracks, uneven floors, or roof sagging often point to deeper issues. A home addition allows you to correct structural faults while adding usable space. We reinforce framing, upgrade foundations, and rework floor systems to build safer, more functional homes.

Poor Efficiency

If your home struggles with cold spots, drafts, or spiking utility bills, it may lack proper insulation or window sealing. A new addition gives you the opportunity to fix those issues and add energy-smart materials, new HVAC zones, and double-glazed windows.

We provide all type of Residential Renovation in King City

Frequently Asked Questions

How much does a home addition cost in King City, Ontario?

Home addition costs in King City typically range from $50,000 to $250,000+, depending on size, layout, and finishes. We provide detailed, itemized quotes based on your needs and site conditions.

Do I need a building permit for a home addition in King City?

Yes, most additions require a permit from the Township of King. We handle the entire permitting process, including drawings, zoning checks, and code compliance with the Ontario Building Code.

How long does a typical home addition take in King City?

Most room additions or second-storey expansions take 8–14 weeks from start to finish. Timelines vary based on structural complexity, weather, and custom features.

Can you match my current home design with the new addition?

Absolutely. We carefully match roofing, exterior materials, trim, and layout to make your addition look original. Seamless design integration is a core part of our service.

What types of home additions do you specialize in for King City homes?

We build rear extensions, garage conversions, sunrooms, second-storey additions, home offices, basement and attic conversions, designed specifically for King City homes and bylaws.

Will my home be livable during construction?

In many cases, yes. We take steps to minimize disruption, contain dust, and work in phases. For larger builds, temporary relocation may be recommended for safety and comfort.

Where We Work

Below are the areas where we typically provide our services. If you don’t see your area listed, don’t worry — just give us a call! We’re happy to work with clients even in remote locations.