Skip to content Skip to footer

Expand Your Living Space With a Custom Home Addition or New Build Designed Around Your Life

Full-service home expansions, second-storey additions, and custom-built homes across Toronto & the GTA — engineered for comfort, value, and long-term livability.

Ready to Build More Space Into Your Home?

Schedule a free consultation and let our building specialists guide you through design options, timelines, permits, and everything you need to create a seamless, well-planned addition or new build.

Limited-time offer: Up to $5,000 in design credits for qualifying home additions — expires Nov. 30, 2025.

Transparent Pricing

Clear, fixed-price quotes with no hidden fees

Dedicated Project Lead

Your personal coordinator from start to finish

Licensed Professionals

Certified tradespeople (insured, WSIB-compliant)

Fully Insured & Guaranteed

Full insurance up to 5M CAD and 2-year workmanship warranty

Toronto’s Most Reliable Team for Home Additions & Custom Builds

For more than a decade, families across Toronto and the GTA have trusted ABH Development Group to expand their homes with structurally sound, beautifully designed additions and new-build projects. Whether you’re planning a second-storey extension, a larger living area, or a fully custom home, our certified team brings engineering precision, clear communication, and dependable project management to every job — from concept to completion.

Sarah & David,

North York

ABH turned our outdated kitchen into the heart of our home — on time and on budget.

Mark,

Toronto

Incredible attention to detail and communication from start to finish.

Layla,

Mississauga

Finally a renovation company that delivers exactly what they promise!

Why Hire ABH Development Group?

What makes us different from other home builder contractors?

BeforeBeforeAfter

Home additions and new builds shouldn’t feel like a fight. With most companies, they do.

Homeowners talk about the same problems again and again when they share their renovation stories online — blown timelines, surprise invoices after the contract is signed, trades that don’t show up, and a contractor who disappears the moment the deposit clears. People feel like they’re managing chaos instead of getting the kitchen they were promised.

Here’s how ABH Development Group is built to solve those exact problems:

A lot of homeowners complain that what begins as a “$35K project” quietly becomes $48K with add-ons, “unforeseen” adjustments, and change order fees.
How ABH is different: We give you a clear, itemized scope and a fixed project price before any work begins. If we quote it, we stand behind it. You’ll know exactly what you’re paying for — cabinets, counters, flooring, electrical, plumbing — line by line.

One of the biggest frustrations people report is silence. Not knowing who’s coming tomorrow. Not knowing why work paused. Not knowing when they’ll get their kitchen back.
How ABH is different: You get a dedicated project lead you can actually reach. You’ll get updates, schedule milestones, and next steps in plain language — not contractor jargon. You’re never left guessing.

Uneven tile lines. Cabinet doors that don’t sit flush. Messy drywall seams. Homeowners are often stuck fixing details that should’ve been done right the first time.
How ABH is different: We only use licensed, experienced trades — not whoever’s “available this week.” Every part of your kitchen (plumbing, electrical, finish carpentry, lighting placement) is done by the right certified professional, not a general handyman.

People constantly say, “We were told 3–4 weeks, we’re now in month 3 and still can’t cook.”
How ABH is different: We build realistic timelines based on real workloads — not sales promises. Then we stick to them. Our crew is scheduled, coordinated, and held accountable by your project lead so you’re not living in construction forever.

Homeowners say getting small fixes handled after install is almost impossible.
How ABH is different: You’re covered. Our work comes with warranty and documented closing inspection. If something needs attention, we come back and make it right. No runaround.

Have a Question About Your Home Additions?

Not sure where to start, or worried about budget, permits, or layout? We’ll walk you through it.

What We Build

A home addition or new build is a major investment — and you need a builder who has already mastered the challenges of Toronto lots, bylaws, and older-home structures.

Second-Storey Additions

Add the space you need without sacrificing your backyard.
Perfect for families who need 2–3 extra bedrooms, an upper-level laundry, or a larger primary suite.

Main-Floor & Rear Additions (Bump-Outs)

Create more room where you use it most.
Ideal for expanding kitchens, adding dining space, or reconfiguring living areas. Seamless exterior blending means the new addition looks like it was always part of your home.

Garage Conversions & Additions

Turn underused space into high-value square footage.
Whether it’s a new attached garage with a room above, or converting an existing garage into a studio, office, or suite, we design for both function and curb appeal.

Laneway Suites & Garden Suites

Modern living solutions built for Toronto’s evolving zoning options.
Add a rental unit, guest suite, or multigenerational space in your backyard. We manage feasibility, design, permits, and full construction.

Custom Homes / New Builds

From empty lot to key-in-hand home — fully managed by our team.
We design, engineer, permit, and construct custom homes tailored to your lifestyle. Tarion/HCRA-compliant for full peace of mind.

Basement Extensions & Lowered Additions

Gain liveable space by going down instead of out.
We expertly handle underpinning, foundation work, and structural upgrades to create legal, comfortable basement areas that integrate with your addition.

Not sure which option fits your home?

Our New Build Makeover Process

A Seamless, Step-by-Step Renovation Experience

  • 1
    Consultation & Design Planning
    We discuss your vision, space, and goals, then create a concept layout or 3D design to bring it to life.
  • 2
    Detailed Quote & Scope
    You get a clear, itemized quote with fixed pricing — no hidden fees or surprises.
  • 3
    Permits & Material Selection
    We handle permits and help you choose cabinets, counters, and finishes that match your style and budget.
  • 4
    Construction & Installation
    Certified trades bring your kitchen to life under the supervision of your dedicated project manager.
  • 5
    Post-Project Support & Warranty
    Full warranty on all work — and responsive after-care if you ever need us
  • 6
    Quality Inspection & Walkthrough
    We review every detail with you to ensure flawless results before project sign-off.

Ready to Start Your Home Addition?

Get your free design consultation today.

Our New Build Projects in Toronto & GTA

View completed remodels featuring custom layouts, premium materials, and precision installation.

Here is a fully rewritten, home-additions–focused version of Section 7 — using new vocabulary, a more structural/engineering-oriented narrative, and language tailored to the complexity of building upward or outward.
It avoids all bathroom references and speaks directly to the needs, risks, and concerns of homeowners planning additions or new builds.

Need to Know More Details?

At ABH Development Group, home additions and new builds are handled with the highest level of structural precision and planning. These projects are larger, more complex, and far more regulated than standard renovations — which is why we operate as a fully integrated, turnkey building team.
You won’t juggle engineers, architects, framers, and trades on your own. We coordinate every discipline, every inspection, and every phase, ensuring your home expansion is seamless, compliant, and built to last for decades.

From architectural design to the final walkthrough, every professional involved is aligned around one goal:
to deliver a safe, well-built, beautifully finished addition that blends naturally with your existing home.

Our Home Addition & New Build Team

Architectural Designer

Creates detailed floorplans, elevations, and 3D concepts to help you visualize your expanded home — ensuring the new structure integrates naturally with your existing layout and exterior.

Structural Engineer

Evaluates load-bearing requirements, foundation conditions, and reinforcement needs for additions, second-storey builds, and structural alterations to guarantee long-term strength and code compliance.

Framing & Carpentry Specialist

Builds the core structure of your addition with precision — including walls, roofs, staircases, and transitions — ensuring everything is square, solid, and ready for finishes.

Licensed Electrician

Installs new wiring, panels, lighting, outlets, and smart home upgrades. Ensures all electrical work meets current Ontario building codes for safety and efficiency.

Licensed Plumber & HVAC Technician

Handles new plumbing lines, drains, heating, cooling, and ventilation systems required for extended living areas, bathrooms, or kitchens within your addition.

Exterior Finishes & Roofing Specialist

Completes siding, roofing, windows, insulation, and weatherproofing so your addition is energy-efficient, durable, and protected from Canadian winter conditions.

Project Manager / General Contractor

Oversees the entire build — planning schedules, coordinating trades, organizing inspections, managing permits, and ensuring your project stays on track from day one.

Our Home Addition & New Build Services

Whether you’re extending a small bungalow, adding a second storey to a growing family home, or building a custom property from the ground up, ABH Development Group manages every stage in-house with structural precision, efficiency, and licensed expertise.

🚀 Streamlined Workflow for Faster Completion

Because ABH manages all design, engineering, trades, and scheduling internally,
we complete additions and new builds significantly faster than traditional contractors,
without sacrificing structural integrity or design quality.

Home Addition & New Build Costs

At ABH Development Group, pricing is clear and fully itemized before construction. Your contract covers labour, materials, permits, engineering, and project management. No hourly billing, change-order surprises, or hidden fees.

Typical Costs for Home Additions in Toronto (2025)

Final pricing varies by square footage, structural needs, materials, and municipal requirements — but ABH ensures you know the full cost upfront.

Timeline, Warranty & Post-Build Support

Timeline

Most home additions are completed in 10–16 weeks, depending on scope, engineering needs, and weather.
New builds typically require 5–9 months from permits to final occupancy.

Warranty

Every project comes with structural, workmanship, and material warranties, ensuring long-term protection beyond construction.

 
 

Post-Build Support

After completion, we provide a full walkthrough, final inspection, documentation support, and responsive after-care, giving you a reliable partner from first sketch to final handover.

 
 
ABH Development Group Inc. place picture
5.0
Based on 29 reviews
powered by Google
Margaret O profile picture
Margaret O
8 months ago
This is the second major project that the team has completed for us. We had a great experience with their work on our basement in the summer of 2024. In August 2025, we hired them to renovate our front porch and stairs. Hamid provided excellent advice about the design and construction. The finished project is even better than we had anticipated! The team worked hard, putting in long hours to complete the project in a timely manner. They were reliable, trustworthy, and conscientious.
Photo from customer reviewPhoto from customer review
Thi Doan profile picture
Thi Doan
1 year ago
I discovered ABH Development Group from their online presence and am very lucky to have chosen them for my project. The house was 60+ years old and in very poor condition. Hamid and his team quickly diagnosed and fixed existing structural and building code issues and then worked on a comprehensive and cohesive renovation design plan to totally transform the house into a modern living space, which was accomplished with stunning results. The house went from dark and dingy to open and bright and now features modern flooring and lighting throughout and luxuriously appointed bathrooms and kitchen. Plumbing was redone everywhere from scratch (and often the electrical work, too) so that Hamid could guarantee the quality and durability of these systems. And even with a small budget for the kitchen, the result was magnificent, with tall kitchen cabinets, gorgeous 24x24 tiles, a custom set of open shelves based on input from the customer, and an open concept resulting from Hamid's excellent recommendation to remove a partition wall which allowed a clever relocation of the fridge and dishwasher to create extra space. As a contractor, Hamid is a very detailed person who follows the building code and insists on doing things right and with laser-precision (literally!). His communication with the customer is excellent and he works with honesty and integrity in everything he does, often advocating on behalf of the customer for better materials and workmanship from suppliers and sub-contractors. He uses technology to provide frequent updates to the customer and guides them toward making sound decisions. His team is also comprised of very skilled and dedicated professionals (Eko and crew) who worked extremely hard, including overtime, to make sure the project was delivered on time and with the best quality possible -- absolutely top-notch work with "fit and finish" that exceeded expectations. You will not need to worry about the warranty of ABH's work. I definitely recommend Hamid and his team to anyone who is looking to renovate their home. 5 stars is a minimum.
Photo from customer reviewPhoto from customer reviewPhoto from customer reviewPhoto from customer reviewPhoto from customer reviewPhoto from customer reviewPhoto from customer reviewPhoto from customer reviewPhoto from customer reviewPhoto from customer reviewPhoto from customer review
Stan profile picture
Stan
1 year ago
We hired ABH Development Group for a single story extension project and they did a fantastic job! The team was very friendly and professional. The project manager, Hamid tackeled every problem and managed to finished the project on time and approximately on the initialy estimated budget. There a few suprises along the way which were explained and neccessary action took place. The communication was supper clear and very transparent. We had a great experience hiring this company and we highly recomend it to others.
Photo from customer reviewPhoto from customer reviewPhoto from customer reviewPhoto from customer reviewPhoto from customer reviewPhoto from customer reviewPhoto from customer review
İzzet Durmus profile picture
İzzet Durmus
1 year ago
Great job done my house thank you very much mister Hamid ABH group ✌🏻
Nevin Kaya profile picture
Nevin Kaya
1 year ago
Tom Perdue profile picture
Tom Perdue
1 year ago
I highly recommend ABH Development Group Inc., led by Hamid, for any home renovation project. I hired them in September 2024 to renovate my front entrance and stairs, and I was extremely impressed with the results and the entire process.
Hamid's communication and responsiveness were outstanding. He actively listened to our ideas, offered valuable advice, and helped us make informed decisions. His pricing was fair and transparent, aligning with my experience on similar projects. Throughout the renovation, Hamid maintained open communication, provided regular updates, and proactively addressed any challenges with effective solutions.
Hamid and the entire ABH team demonstrated exceptional professionalism and dedication. Hamid's talent and meticulous attention to detail were evident in the quality of the work. I also greatly appreciated the design input from their interior designer, whose expertise significantly enhanced the final result.
The completed renovation is beautiful and a resounding success. The improved insulation has made a noticeable difference in maintaining a comfortable temperature, and my family and guests are delighted with the new entrance and front stairs. Whether your project is large or small, I confidently recommend ABH Development Group Inc. for a positive and successful renovation experience.
Photo from customer reviewPhoto from customer reviewPhoto from customer review
Isabel Magnoli profile picture
Isabel Magnoli
2 years ago
The project was completed within the agreed upon timelines and the team was great (very respectful). We are happy with the renovation.
Tom Good profile picture
Tom Good
2 years ago
The project manager, Hamid Alizadeh, and his work crew did a first rate job on my basement project -- on budget and completed in a tight timeframe. Hamid was a pleasure to work with, and I found him knowledgeable and helpful. I would definitely be interested in hiring his team to work on another project.
Elizabeth Byce profile picture
Elizabeth Byce
2 years ago
Barry Weisleder profile picture
Barry Weisleder
2 years ago
ABH Development Group Inc. did a marvelous job renovating our house in west-end Toronto. The project involved beautiful new wood floors, base boards, doors, two transformed washrooms and stair case. Not only were Hamid and his crew professional and friendly, they met time lines and did so with high quality work. Their associates in plumbing and electrical installations were superb. Reasonable cost estimates and total transparency are the rule. Hamid anticipated needs, responded creatively to the surprises inevitable in a project centered on a 120 year old house, especially when it came to the front veranda which was completely re-constructed. Almost every day a bonus arose, such as the addition of a crucial weight-bearing pillar in the basement. It included the painting of a rescued armoire. Hamid and his wife have a trained eye for colour and style. Their timely and unstinting advice enhanced the beauty of the final product. I highly recommend ABH Development Group. We are keeping in touch with ABH -- with a view to making future improvements.

FAQ

You Have Questions — We Have Answers

Yes — almost every home addition requires a building permit. This includes second-storey additions, bump-outs, major structural changes, and most garage conversions. Only very small, non-structural projects are exempt.

Standard permit reviews typically take a few weeks, but may take longer if zoning issues or additional documents are required. If a minor variance is needed, adding a Committee of Adjustment process can extend the timeline by several months.

Costs vary by size, complexity, structural work, and finishes. Small additions may start at a lower price point, while second-storey additions and large expansions can reach higher ranges. We provide a tailored estimate after reviewing your property.

Building up (adding a second storey) often avoids foundation work and can be more cost-effective for smaller lots. Building out requires foundation expansion but may offer fewer structural challenges in some homes. The best option depends on your house type.

Yes — well-designed additions almost always raise resale value by adding functional living space. Kitchens, primary suites, and additional bedrooms tend to produce the strongest returns.

Most additions take several months from demolition to finishing. Smaller bump-outs may take less time, while full second-storey additions or new builds naturally require more time due to inspections, structural work, and finishing stages.

Often yes, especially for rear additions or second-storey builds. Some phases may require short periods of vacancy for safety or efficiency. We plan the project to minimize disruption to your daily life.

Absolutely. We match materials, siding, brick, windows, rooflines, and architectural details so the addition blends seamlessly with your home’s original character.

You need architectural drawings, structural engineering, and sometimes surveys before any construction starts. These documents are required for permits, accurate pricing, and safe building practices.

If the design requires relief from zoning rules (like setbacks or height limits), we handle the minor variance process. Many homeowners successfully obtain variances that allow their desired project to move forward.

Clear plans, detailed scope, and realistic allowances are key. We establish a transparent budget early, identify potential risks, and maintain open communication during construction to prevent surprise costs.

There will be noise and activity during working hours, but we set clear schedules, keep the site organized, protect your home’s interior, and ensure your neighbours are respected.