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Home Additions & Second Storeys in Richmond Hill

Home Additions & Second Storeys in Greater Toronto Area

Adding a second storey or building out a rear or side addition is one of the bigger moves a homeowner can make short of buying a new house. Instead of moving, you're gaining bedrooms, a bigger kitchen footprint, or a proper primary suite while keeping the lot and neighborhood you already have. In Richmond Hill, where many streets are built out with older bungalows and detached homes on decent-sized lots, this kind of project is common: raise the roof and add a full second floor, or push out the back of the main floor for a bigger kitchen and family room.

This work is structural, not cosmetic. It touches the foundation, the framing, the roofline, and often the mechanical systems (HVAC, electrical panel capacity, plumbing runs). A second storey means engineered drawings, a building permit through the Town of Richmond Hill, possible truss redesign, and coordination with an engineer to confirm the existing foundation and walls can carry the new load. A rear or side addition involves excavation, new footings, and tying the new roofline and siding into the old structure so it doesn't look bolted on.

When comparing contractors, look past the sales pitch and check: do they pull their own permits or leave that to you, do they use a structural engineer as a matter of course, how do they handle unexpected findings once walls are opened (old wiring, undersized joists, water damage), and can they show completed additions of similar scope, not just kitchen or bath work. Ask for a payment schedule tied to milestones, not a big upfront deposit, and get a clear line on who's responsible for the finished exterior matching the existing brick or siding.

Our scoring weighs licensing and insurance, permit history, how consistently a contractor delivers projects on budget and on schedule, and what past clients say about communication once the drywall is closed up and problems, if any, show up. See how each of the 8 firms stacks up in the ranked guide to Richmond Hill renovation contractors, and read our methodology for exactly how we score and verify each one.

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All home additions & second storeys in Richmond Hill, ranked by score and relevance

8 businesses, scored on recent reviews. The order weighs each business's overall score by how much of its reviewed work is home additions & second storeys, so a lower-scored specialist can rank above a higher-scored generalist.

GMC Construction Inc.
#1
91

GMC Construction Inc.

5.0(85)✓ Google-verified

Every recent review praises GMC's professionalism, timeliness, and quality output. Max and the team handle everything from small fixes to full renovations with equal care, showing up on time, keeping sites clean, and finishing within budget. Reviewers name specific work: kitchen and bathroom renovations, flooring (hardwood, vinyl, tile), TV mounting with hidden wiring, tiling, pergola and patio builds, even commercial drop ceilings. The consistent thread is that Max asks good questions, solves problems without being asked, and treats each home like his own.

Home Additions & Second StoreysInterior Construction ContractorKitchen Renovation
Summit Contractors
#2
90

Summit Contractors

5.0(71)✓ Google-verified

Every review across three years is five-star, with reviewers consistently praising Arash and his team for delivering renovations on schedule and within budget. Buyers highlight his transparent communication, skilled trades coordination (especially kitchen and bathroom work), and willingness to handle add-ons without scope creep. Teams keep worksites clean and treat homes with respect, from downtown Toronto townhouses to Newmarket properties requiring structural work like steel beams and load-bearing wall removal.

Home Additions & Second StoreysEmergency & Quick-Turnaround RepairsFlooring Contractor
Pro A&R Renovation Group Inc
#3
86

Pro A&R Renovation Group Inc

5.0(28)✓ Google-verified

Pro A&R Renovation has earned a perfect 5-star rating across 28 reviews, with clients praising owner Hamid's meticulous craftsmanship, on-time delivery, and budget management. His approach stands out: he works one project at a time with visible daily progress, handles design choices thoughtfully, manages expectations honestly, and cleans thoroughly each day. Repeat clients frequently return after years, citing his reliability and fair pricing across kitchens, bathrooms, basements, and whole-home work.

Emergency & Quick-Turnaround RepairsWater Damage Restoration ServiceDrainage Service
Smart Renovations
#4
92

Smart Renovations

4.9(136)✓ Google-verified

Smart Renovations earns trust across repeat projects through meticulous planning, design rendering software that lets clients visualize changes before build, and Tina's hands-on oversight. Reviewers consistently praise on-time delivery, transparent quotes with tiered price options, and crews (Winston, Eric, Kosta, Richard among them) who stay tidy, communicate daily via group chat, and catch details others miss. Kitchens, bathrooms, and whole-floor transformations dominate the work; designers like Ana and Jenara bring custom solutions (flush-mount fridges, integrated appliances, custom cabinetry) to life. Multiple clients return for second and third projects. One reviewer noted a minor design error post-install, resolved quickly without hesitation.

Kitchen RenovationBathroom RenovationBasement Renovation & Finishing
XG Renovations Kitchen & Bath | Design & Build
#5
89

XG Renovations Kitchen & Bath | Design & Build

5.0(51)✓ Google-verifiedPublishes prices

Jennifer and Jimmy lead a deeply organized team that listens carefully, delivers stunning 3D designs, and completes projects ahead of schedule and within budget. Reviewers repeatedly praise the named leads' design and project management, the friendliness and skill of their trades crew, and the protective care they take during renovation-protective mats, dust control, and a clean worksite are consistent touches. Across kitchen, bathroom, flooring, and multi-room renovations ranging from three weeks to eleven weeks, families appreciate the transparency on costs, timelines, and material choices. Custom details (hidden cabinet passages, pot lights, custom cabinetry) show the team's commitment to bringing individual visions to life. Trust emerges as the strongest thread: reviewers often note they chose XG despite initial hesitation about contractors, and were proved right by execution.

Kitchen RenovationBathroom RenovationHome Additions & Second Storeys

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Dupont Custom Homes
#6
79 low data

Dupont Custom Homes

4.9(19)✓ Google-verified

Ken and Dupont Custom Homes deliver skilled work across kitchens, exteriors, and whole-home projects, handling jobs start to finish with strong technical knowledge and customer focus.

Custom Home BuilderKitchen RenovationInterior Designer
MB Home Reno
#7
90

MB Home Reno

5.0(101)✓ Google-verified

MB Home Reno's 100-plus five-star reviews highlight a team that listens, delivers on time and budget, and treats homes with care. Mark and his crew handle everything from kitchen and bathroom renovations to whole-home projects, shower repairs, plumbing fixes, and electrical work, keeping sites spotless and communicating clearly throughout. Work ranges from condo powderroom updates to complete townhouse overhauls. Customers praise specific finishes (lime wash walls, pot lights, modern kitchens) and the owner's willingness to suggest options that fit the budget. Teams show up in snow storms. One single negative review offers no detail, leaving the pattern of consistent five-star praise unchanged.

Kitchen RenovationHome Additions & Second StoreysWhole-Home & Gut Renovation
Petra Renovation
#8
71 low data

Petra Renovation

4.8(49)✓ Google-verified

Paul delivers smooth flooring installations and typically exceeds timelines; most customers praise his responsiveness during the job, clean work, and fair pricing. However, a few report serious post-install issues (buckling, cracks, flexing) and found Paul unresponsive when problems surfaced, which raises concerns about warranty follow-up and problem-solving.

Flooring ContractorTile ContractorCustom Carpentry & Finishing

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Common questions about home additions & second storeys

How much does a second storey addition cost in Richmond Hill?
Most full second-storey additions run well into six figures once you include structural work, permits, engineering, roofing, exterior finishes, and interior build-out. A simple rear or side single-storey addition costs less per square foot than a second storey because it avoids re-engineering the existing structure and roofline. Get at least three itemized quotes since scope (finishes, HVAC changes, window packages) swings the price more than square footage alone.
How long does a home addition or second storey take to complete?
A permit alone can take several weeks to a few months depending on the Town's review queue and whether variances are needed. Construction for a second storey typically runs 4 to 8 months once permits are in hand, and a ground-floor addition can be faster, often 2 to 4 months, depending on size and how much of the existing house is affected.
Do I need a permit for a second storey or addition in Richmond Hill?
Yes. Any addition that adds floor area or changes the structure requires a building permit from the Town of Richmond Hill, and a second storey almost always requires engineered structural drawings. Skipping this isn't just risky, it can void insurance and cause problems when you sell the house.
How can I tell if a contractor's work will hold up?
Ask to see a project of similar scope that's been finished for at least a year or two, not just recent photos, and ask the homeowner directly about issues like settling cracks, roof leaks, or HVAC balance after the addition was occupied. A contractor who's confident in their work will connect you with a past client.

Last updated 2026-08-08