We invite you to immerse yourself in the harmonious world of the best basement renovation and finishing experts in Toronto and the GTA. Don’t take our word for it – view our portfolio and read our reviews to experience the Harmony world. Contact us if you have any questions or would like a FREE, no-obligation estimate.


Harmony Basements is a leading basement contractor, serving homeowners across Toronto and the GTA. We take pride in being innovators in the basement renovation and finishing industry. With over 20 years of experience in basements, we know all the trade secrets. We ensure that we have our customers’ stamp of approval in every project we take on. At Harmony Basements, we always provide the highest-quality service with our professional attitude and commitment. Moreover, our team of experts uses top-of-the-line tools, technologies, and materials to ensure the utmost perfection in our work.

Redefining Basement Renovations

Renovating a basement is more than construction and design. It takes innovation and creativity. Harmony Basements specializes in merging fine detail with exquisite design and structural integrity to achieve stellar results. We use advanced technology to create elaborate virtual tours that allow our clients to see exactly how their new basement will look when it’s complete.

Most contractors are focused on getting the job done as quickly and simply as possible. In their attempt to maximize their profit margins, they often cut corners and shortchange homeowners. Not us. Harmony Basements takes a customer-focused approach to renovation projects and offer comprehensive solutions that keep homeowners at the center.

Crafting Stunning Basements with Care, Precision, and Passion

We start by using advanced technology to create elaborate virtual tours that allow our clients to see exactly how their new basement will look when it’s finished. This not only helps them visualize the end result, but also allows them to make informed decisions about the design and layout of their new space.

Once we have a clear understanding of our client’s vision, we work diligently to offer a variety of design options based on their preferences. We don’t believe in a one-size-fits-all approach, so we take the time to listen and understand our client’s needs.


At Harmony Basements, we believe that a basement should be more than just a storage space or a place to do laundry. It should be an extension of your home and a reflection of your personal style. We’re passionate about helping our clients transform their unfinished or outdated basements into beautiful, functional, and inviting spaces that they can enjoy for years to come.

We’re also committed to quality and integrity in everything we do. We don’t cut corners or use subpar materials to save money. Instead, we only use the highest quality materials and employ skilled craftsmen who take pride in their workmanship. This ensures that every project we complete is not only beautiful but also built to last.

We believe in the transformative power of a well-designed and well-built basement. We’re passionate about helping our clients achieve their vision and creating spaces that they’ll love for years to come.

What Sets Us Apart

Our innovation knows no bounds. We’ve created systems to streamline our processes and curate client-centered solutions. We don’t believe in a one-size-fits-all approach. Instead, we take the time to work closely with our clients to fully understand their vision for their new basement. Then, we work diligently to offer a variety of design options based on their preferences.

From preliminary procedures to post-construction, the Harmony Basements team is there every step of the way, ensuring that no detail is left behind.


Architectural Creative Director
(B.Arch) Architect – (A.A.S) CAD Designer

Diego will never settle for anything less than perfection. He thoroughly studied the art and science of architecture and graduated with honours at a very young age. Diego and his team of professionals devote their heart and soul into every basement renovation project. This is why thousands of homeowners in Ontario have trusted him to build their dream basement. His unrivalled pursuit of perfection in every aspect of the design and build process has helped him establish an award-winning home improvement experience.

Dream Decor Studio Meticulously Designed by Diego & Built by Harmony’s Dream Team

Diego Botia Founder & CEO of
Harmony Basements

Nancy Peterson Founder & Former
CEO of HomeStars
We’re Celebrating a 98% client satisfaction rating

From our Leader
Seeing our customers happy every day “from design to completion” is the driving force that makes me absolutely love doing what I do. My top priority is delivering world-class renovations with a personal touch that is magnificently rare.

Diego Botia
We’re Celebrating a 98% client satisfaction rating

Why Our Clients Love Us So Much?

We Take Pride In Our Work, Reputation & Customer Service

Building your dream basement is our goal and building your trust is our promise. We are a Canadian homegrown company that embody values such as trust, integrity, and commitment. We constantly strive to provide excellent workmanship and superior design that improves the quality of life for families. But don’t take our word for it, here’s what our clients have to say.

Proud Member of

memberships and badges, CHBA, Renomark. Bild and Ontario Home Builders Association

Where Reputation Matters

While the quality of our work speaks for itself, hear what our happy customers have to say…

Basement HomeStars Logo

Our Services & Expertise

Basement Renovation

Basement Finishing

Second Suite

Personal Use

Laneway and Garden Suites

Basement Design

Building Permits

Basement Waterproofing

Structural Engineering

Basement Kitchen Renovation

Basement Bathroom Renovation

Contact Us

Our Most Recent Work

Luxury Finished Basement

Use the Interactive 3D Virtual Tour and feel as real as being in the basement!

Click PLAY & Walk around with your mouse or touch screen

Unrivaled Design Experience

Maximizing our customers' return on investment by designing harmonious basements.

Click to Play & Enjoy the 3D-Model Video

Our Process

01 Get a free estimate!

The first step in finishing your basement is to contact us. You will be greeted by a client service advisor and we will give you a free at-home estimate.

02 In-home consultation

The main purpose of this consultation is to completely understand your needs for this new space, by asking the right questions, listening, and proposing smart and creative ideas.

03 Our Proposal

Our work proposal includes a 3D render design that will help you visualize how your dream basement will look. It will also include an itemized breakdown of the cost of the project.

04 Finance your project

We understand that costs can be a major barrier in getting your dream basement. For that reason, we offer flexible financing options with dedicated financial advisors who will provide approval on loans to our valued clients and to help them make a confident decision.

05 Visit our Design Centre

At this stage of the process, our design consultant will walk you through our showroom to help you choose the finishes and materials for your new basement.

06 Scheduling

Once the construction drawings and the specifications are completed, the project manager will provide our clients with a detailed project schedule.

07 Material Delivery

After the dates have been set, the materials will be delivered. We take pride in keeping the construction space as clean and as mess-free as possible.

08 Installation Begins

With the materials on hand to start working on your dream basement, our team of excellent craftsmen will begin the installation process.

09 Quality Inspection

Our quality control coordinator will inspect the installation process from start to finish, guaranteeing a perfect job every time.

10 Client Satisfaction

At this stage, we have the opportunity to ensure client satisfaction and foster a lasting relationship.

11 Warranty

Once the basement renovation is complete, we provide our valued clients with lifetime basement renovation warranty documents.

A Great Basement Renovation Begins With A Great Design

Are You Ready To Be WOWED?


Let’s Test Drive Your New Dream Basement

Imagine being fully immersed in your dream basement before you spend thousands of dollars. With Harmony Basements Virtual Reality technology, that is a real possibility. You will work with one of our Creative Architectural CAD Designers to explore various basement design concept ideas and experience the virtual space instantly like never before. Our technology needs to be experienced, because in this case, seeing is believing.

as seen on

Your Basement Deserves the Absolute Best!

Up To $5,750 OFF - Exclusive Summer Special

FREE LIFETIME Warranty Upgrade Package
WATER-PROOF & MOULD-FREE Envelope Building System

  • 100% Steel Framing Construction (No-Wood)
  • TORLYS™ Luxury Engineered Vinyl Floor (canadian-Made)
  • TORLYS™ Vinyl Smart Stair-Capping (100% Matching Floor)
  • TORLYS™ Premium Underlay W/ Microban® Protection

Offer expires July 31st, 2024

Why Choose Us

Reputable Company
Reputable Company

Harmony Basements has over 20 years of experience in the basement renovation and basement finishing industry. Our mission as a leading company in the basement renovation and basement finishing business revolves around integrity and full transparency with our customers. There are no surprises, no hidden fees, and no fine-print terms. Our work is built on complete honesty and our prices are competitive.

3D Virtual Tour
3D Virtual Tour

Harmony Basements offers a 3D virtual tour that is truly one of a kind. You can easily view your basement finishing during every step of the renovation process, as well as see the end result of your finished basement using our special VR headset. Our 3D virtual tour offers you a glimpse into a brighter future where you can have the basement finishing of your dreams.

High Quality Basements
High-Quality Basements

Experience superior excellence with our unwavering dedication to constructing high-quality basements. We are dedicated to customer satisfaction by paying close attention to every detail, ensuring exceptional craftsmanship and only use the best materials on the market. We build basements to last.

Dedicated Project Management
Dedicated Project Management

Our project managers are seasoned professionals who specialize in basement renovation and basement finishing, from the final touches down to the basics. In addition, as proud members of RenoMark and BILD, we are constantly striving to be ahead of the curve. That’s why we are the first to know about changes in provincial building codes, municipal requirements,  and health and safety regulations.

Flexible Financing Available
Flexible Financing Available

We understand that your house is an asset and investing in a new basement finishing comes with a price. Although renovating or finishing your basement adds tremendous value to your property, it is still a huge financial venture. This is why our financing plans are flexible and specifically tailored to fit your financial capacity.

Lifetime, Transferable Warranty
Lifetime, Transferable Warranty

Harmony Basements offers a lifetime warranty for your renovated or finished basement where you are guaranteed our long-term commitment. Our warranty plans are comprehensive, flexible, and tailored to suit your needs.

Turn Key Solutions
Turnkey Solutions

With Harmony Basements, you can be certain your basement renovation is complete, fully finished, and ready to use by the time the job is done. Our turnkey solutions ensure that your basement is equipped with all necessary utilities such as plumbing, lighting, ventilation, and insulation, as well as any additional design elements.

harmony van

Wide Location Coverage

Distance has never been an issue for us. We have seen many basement projects to completion all throughout Ontario. So whether you live in Downtown Toronto, the GTA, or anywhere beyond, we are more than ready to deliver our services right to your doorstep.

Basement Renovation: Frequently Asked Questions

We know finishing your basement is a major decision
and we know that you probably have a lot of unanswered questions.

What basement renovation services do you provide?

At Harmony Basements, we make it easy and stress-free for you to finish your basement. Our one-stop basement renovations expertise provides you with the full service you need to finish your basement from start to finish. Need help to decide on a finish? Our skilled interior designers are on hand to help. Need to visualize what your finished basement will look like? Our highly trained architects are excited to help you. Whether you have the basement of your dreams in mind already, or you want to be wowed with one of our original creations, we’ve got you covered. We are here to help, no matter the size or the scope of work.

How is Harmony Basements better than other basement companies?

We are experts in basement renovations and have a deep understanding of what our clients need. At Harmony Basements, we have developed and perfected a finishing system that is 100% green and mould-free, while avoiding any major downfalls, complications, hassles or problems that are often associated with a complex project like this. Instead of using lumber and drywall that could be a food source for mould, we use cutting-edge new materials that are mould-resistant. We are passionate and dedicated to helping you create the perfect basement while ensuring a safe, seamless and smooth experience – from start to finish. Click here to see the difference.

How long does it take to finish a basement?

Professionally finishing an average 1,000 sq ft basement takes anywhere from 4 - 8 weeks. This timeframe is to ensure quality over a rushed job. We are here to accommodate our clients’ schedules. We work all year round, including weekends. Typically, it can take even as little as 2 to 4 weeks to transform a dark and dingy basement into a welcoming and stunning space that you will love spending time in. We work effectively, yet cause little to no disruption to your daily household activities.

How much does it cost to finish a basement?

On average, finishing a basement in Toronto can cost anywhere between $40 and $120 per square foot. The cost to finish a basement depends on factors like the size of the basement, the upgrades you want, and how much labour is needed. Every basement is different.

The best way to know how much it costs to finish a basement is to evaluate the basement to decide the amount of work needed. Only then will you have a clear estimate for the basement project.

Read more about basement finishing costs

How much value does a finished basement add to a house?

Finishing a basement not only increases the practicality of your home; it also increases your property's market value significantly. Prospect homebuyers or tenants will appreciate the additional space in a finished basement. This way, you receive a great return on your investment, making basement finishing a worthwhile endeavour.

Do I need a permit to renovate my basement?

Yes, you do need a building permit for a basement renovation when you make alterations to the basement's foundation such as building an additional wall or tearing a wall down. You will also need a building permit to renovate your basement into a legal secondary suite only because it must comply with your city's zoning bylaws.
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How much does a building permit cost to obtain?

The cost to obtain a building permit range can range anywhere from approx. $500 - $3000. This depends on the size and complexity of the basement renovation project. Different cities/townships may have different bylaws that can affect the cost as well. That’s why we recommend consulting with us to obtain the most up-to-date information and we can help guide you through the process.

The cost of obtaining building permits can vary depending on the size and complexity of the basement renovation project. We recommend contacting your local building division for further information or contact us and we can help guide you through the process.
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What does your warranty cover?

Harmony Basements ensures that your basement renovation is conducted with expert skill and in line with industry standards. Our warranty includes the quality and performance of materials, guaranteeing they are free from manufacturer's defects. We are also guaranteeing that structural modifications are met with building codes and regulations, providing you with peace of mind.

Is the warranty transferable?

Yes, the warranty is fully transferable to the next homeowner.

Do you subcontract out your work?

We do not subcontract any of our work. We believe your renovation is only as good as the team behind it. That goes from the architect to the builder, to the creatives, to the tradespeople who work hard to bring your vision to fruition. Not subcontracting work means our quality is never compromised.

Is it safe for us to be in the house while the basement is being renovated?

The safety of residing in your home during a basement renovation depends on the specific project and the potential hazards involved. Consult with Harmony Basements to determine the best course of action for ensuring a secure living environment during the renovation.

Can basement renovation be done during the winter?

Rain, snow or shine, we work all year round, including winter.

We are concerned with the growth of mould and mildew in our basement. How will you help prevent this?

While conventional construction materials such as lumber, drywall and fibreglass insulation work great for above-ground construction, these products can rot and cause mould in high-moisture areas like basements. Our mould-repellent products such as Magnesium Oxide Wallboard allow moisture to pass through naturally to prevent mould from growing. The materials we use are top-of-the-class to prevent mould and mildew. Also being fire and waterproof, sound-absorbent and eco-friendly, they are designed for the safest and most comfortable living environment. We use only the best materials – that is the Harmony way.

What type of flooring should I use for my basement?

We highly recommend choosing our handpicked selection of Torlys Luxury Engineered Vinyl Floor for lifetime durability and to withstand environmental factors that typically change the structure of natural hardwood.

Have more questions about your new basement?

Please Call Us! We’d be happy to answer any questions you might have.

Everything you need to know about basement renovations