Best garage additions & conversions companies in Ontario

★★★★★5 (189 reviews)score 94/100

Gracia Makeovers earns near-perfect marks across 189 reviews for finishing on schedule and treating function as seriously as looks, with Elijah and Daniel walking clients through decisions like drain slopes and pipe sizing rather than just handing over a finished room. The crew works 9-5 including Saturdays and cleans as they go, which shows up repeatedly in feedback about a low-stress build experience.

• Listens to client vision before proposing solutions
• Finishes on time even on tight timelines
• Mid-range pricing with good-faith negotiation
• Named leads (Daniel and Elijah) consistent across projects

Services: custom finishes heated garages, detached garage construction, garage additions conversions

★★★★★4.9 (79 reviews)score 88/100

Toronto Garage Solutions specializes narrowly in turning bare concrete garages into organized, finished storage spaces, and Sikandar and Mujtaba's team gets singled out for clean epoxy work and fast multi-day turnarounds. Reviewers also note the team will come back and adjust installed shelving or slatwall on request after the job is done.

• High-quality epoxy and flooring finishes
• Efficient multi-day project turnarounds
• Organized shelving and slatwall storage systems
• Responsive aftercare if adjustments are needed

Services: garage additions conversions, detached garage construction, garage doors openers, garage permits design

★★★★★5 (49 reviews)score 88/100

D2 Build handles the paperwork headaches that sink other additions projects, with Jim, Steve, Peter, and Stephanie named across jobs for navigating permitting snags and party walls without surprise costs. Their 30-plus years of experience in East York and Leslieville shows in how they manage unexpected site conditions in older housing stock.

• Deep expertise in party walls and permit navigation
• Transparent pricing with no cost overruns reported
• Named team across design, project management and trades
• Clean, respectful worksite throughout

Services: garage additions conversions, detached garage construction, custom finishes heated garages, carriage house laneway garage

★★★★★4.8 (88 reviews)score 86/100

Terzetto pairs a build crew with an in-house design team (Abby and Vivian are named repeatedly) that translates rough ideas into practical layouts, while project manager Taylor keeps clients updated daily. Across 88 reviews the pattern is consistent five-star work, with one notable dispute over a holdback payment standing out against that record.

• In-house design team collaborates on every project
• Daily communication and transparent project management
• Clean, respectful worksites
• Budget accommodations offered without friction

Services: garage additions conversions, detached garage construction

★★★★★4.8 (94 reviews)score 88/100

Norseman takes on the harder end of additions work, including foundation reconstruction and load-bearing wall removal, and keeps it on schedule with project managers like Mo, Ezad, and Greg doing daily site visits and evening updates. Designer Ghalib gets credit for translating client priorities into finished spaces clients say they love.

• Project managers embedded on-site throughout
• Transparent, itemized pricing up front
• Daily photo updates via app
• Handles foundation and structural complexity on schedule

Services: detached garage construction, garage additions conversions, carriage house laneway garage

★★★★★4.8 (58 reviews)score 83/100

Grand Building and Contracting's Adam, Jason, and Alex run a shop where reviewers report skilled trades, thorough cleanup, and owners still getting fast answers to maintenance questions years after a garage or porch build wraps up. Permit delays show up as the main friction point, but reviewers say the pace picks up once construction starts.

• Named leadership (Adam, Jason, Alex) stays reachable long-term
• On-time and on-budget delivery once permits clear
• In-house permit and design-build expertise
• Thorough cleanup and attention to detail

Services: garage additions conversions, detached garage construction, garage permits design, custom finishes heated garages

★★★★★4.5 (956 reviews)score 81/100

NewAge is a different kind of pick on this list: a product company shipping garage storage cabinets and outdoor kitchen units rather than a build crew, and it's the only entry with a real volume of reviews (956) to draw on. When orders arrive intact, customers like the soft-close drawers and finish quality, and named support staff (Robert, Karen Cubillan, Farhan, Bharati, Prathamesh Gawali) move quickly on replacements.

• Soft-close drawer and cabinet hardware with a premium feel
• Named support staff assigned through order resolution
• Fast damage replacement, sometimes ahead of promised dates
• Combined garage storage and outdoor kitchen product line

Services: garage additions conversions, detached garage construction, custom finishes heated garages

★★★★★5 (20 reviews)score 83/100

Vicolo's Pirooz stays on-site daily until a project wraps, and the 20 reviews on record are unanimous five stars praising transparent budgeting and real-time problem solving instead of surprise bills. It's a smaller sample than the top names here, but the pattern of client feedback is consistent.

• Pirooz on-site daily until completion
• Transparent budget set at the start
• Pre-vetted, respectful trade network
• Issues explained clearly rather than hidden

Services: detached garage construction, garage permits design, garage additions conversions

★★★★★5 (40 reviews)score 83/100

Bedo's team at Greater Toronto General Construction covers everything from door installation to custom wall units and basement work, and a property management company reportedly refers clients to them as a default contractor. Reviewers point to punctuality, honest pricing, and problem-solving during unexpected issues as the recurring strengths.

• Punctual, transparent and fair estimates
• Handles design input and mid-project problem solving
• Cleans up thoroughly and respects the home
• Fast turnaround on diverse renovation work

Services: detached garage construction, garage additions conversions

★★★★★4.9 (62 reviews)score 73/100

Padda Construction under Jugraj turns quotes around quickly, often within 24 hours, and reviewers describe straightforward contracts signed upfront with skilled subcontractors for tile, electrical and glass. Pricing runs on the higher side and the team can be selective about which jobs it takes.

• Quick turnaround on quotes
• Transparent contracts and pricing signed upfront
• Skilled subcontractors for specialty trades
• Jugraj Padda's hands-on project leadership

Services: detached garage construction, garage additions conversions

★★★★★5 (15 reviews)score 78/100

Bluestar Properties, led by owner Phil, has a perfect five-star record across additions, basement excavations, new builds, and custom finishes, with reviewers repeatedly noting clean, organized worksites and delivery on time and on budget. The review count is smaller than the market leaders, so treat it as a promising, lower-volume signal.

• Owner-led professionalism and hands-on involvement
• Permit and design coordination handled in-house
• On-time, on-budget track record
• Multi-trade expertise across additions and excavation

Services: detached garage construction, garage additions conversions

★★★★★5 (13 reviews)score 76/100

Sunny Construction's small but perfect review set highlights clean drywall repairs and bathroom and basement work delivered on time, with reviewers describing the process as straightforward and easy to manage. It's a lower-volume pick worth considering for finish-heavy jobs rather than full structural additions.

• All five-star reviews to date
• Finish work and drywall expertise
• Punctual project completion
• Straightforward, honest communication

Services: detached garage construction, garage additions conversions

★★★★★5 (11 reviews)score 74/100

MTP Construction's 11 reviews are all five-star and cover projects including 2500 sq ft additions and custom garage builds, with owner Michael on-site daily coordinating trades and permits. Reviewers describe transparent pricing with no surprises across full home renovations and additions.

• Named principal (Michael) on-site daily
• Full-service design, permit, and multi-trade coordination
• Transparent pricing with no surprises
• Track record on large additions and custom garages

Services: detached garage construction, garage permits design, custom finishes heated garages, garage additions conversions

★★★★★4.8 (19 reviews)score 74/100

GTA Building Solutions' Eddie gets consistent praise for personal involvement, honest quoting, and telling clients what they actually need rather than upselling. One crew member's missed quotes stand out as an isolated issue against an otherwise reliable track record on scheduling and budget.

• Owner Eddie's personal involvement and design guidance
• Consistent on-time and on-budget delivery
• Fair quoting practices
• Professional cleanup with minimal disruption

Services: detached garage construction, garage additions conversions

★★★★★4.5 (18 reviews)score 68/100

BRIKS gets credit from most reviewers for adapting plans on the fly without pushback and quoting prices that hold through completion, but a handful of reviews describe flooring defects and slow follow-up on repair requests. Worth a look for smaller, flexible jobs, with clear expectations set on finish quality and response times.

• Willing to adapt plans mid-project
• Quoted prices align with final costs
• Trades execute to spec on most jobs
• On-time delivery on the majority of projects

Services: garage additions conversions, detached garage construction