Basement Renovation King City

Your basement should feel just as considered as the rest of your home. Harmony Basements is a basement renovation company in King City creating elegant lower levels for family, guests, work, or quiet retreat.

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Expect The Absolute Best
“Superior Design • Flawless Execution“

Diego Botia, (B.Arch) Architect

Custom Basement Renovation & Finishing in King City

Basement Family Room with Blue Wall Painting - Basement Remodeling King City

Harmony Basements is an all-in-one basement renovation and finishing company in King City with over two decades’ worth of experience. We have our own in-house designers, architects, construction workers, and project managers.

The members of our team handle every basement remodel with the same level of devotion, care, and attentiveness. When you partner with us, you know you’re the number one priority.

Basement Renovation in King City

Our King City basement remodels cover everything from the demolition to the final quality inspections. Our designers use AutoCAD to develop 3D renderings, our project managers ensure your project is on time and with budget, and our contractors make sure your renovation is of the highest quality. We have licensed and insured technicians who will install your ventilation, HVAC, electrical, and plumbing systems safely and efficiently. Additionally, we always comply with building codes as well as health and safety regulations.

While many basement finishing companies use materials that are not eco-friendly, and even harmful to the environment and your health, Harmony Basements ensures that we provide customers 100% eco-friendly, energy efficient and mould free solutions. Our reputation is based on our ability to provide clients with top notch service and the absolute best products in the business. Having serviced the King City area for decades, we are a company that continuously strives for perfection in every aspect of the building process. Don’t settle for second-rate, let us prove to you what kind of quality Harmony Basements has become synonymous with.

Custom Kitchen Design in Basement Finishing Project Richmond Hill

REQUEST YOUR FREE DESIGN ESTIMATE IN KING CITY

Our company aims to continuously improve our environmental building methods and provide more sustainable practices ever. Setting us apart from other basement companies are our globally sourced, cutting edge building materials. We use mould-free, fire and water resistant, energy efficient products to guarantee your future basement protection in all scenarios. In basements, where damp and moisture run amok, conventional building products such as lumber and drywall cannot suffice.

Instead, we use magnesium boards as well as the latest and best in water-resistant flooring. For example; Torly’s Vinyl Plank Flooring and Natural Insulations and Magnesium Oxide Wall Boards, which are mould repellent and allow moisture to pass through them naturally. These and other such building materials are certifiably superior; conscious products made with the best materials and craftsmanship in the industry.

Custom Designed Quality Basements

Harmony Basements employs a dedicated team of highly qualified professionals who are ready to provide you with the best in customer service and communication. To begin with, our amazing team will show you our extensive collection of finishes and materials so that you can design your dream to perfection while our team helps. This limitless customization ensures that your vision becomes a reality, which our skilled builders will then work tirelessly to make a reality.

Open Space Basement with Living Room and Kitchen - Basement Design King City

Backlit Ceiling in Amazing Basement Renovation Project King City

More Basement Renovation Projects

Unlike most other basement renovation companies, we employ a workforce that streamlines the building process, delivering finished basements quickly, and efficiently from the first day of planning. To do this, we use an integrated Multi-Trade Workforce and Management Team, which is available to you on-site, every day until the job is complete. At Harmony Basements, we believe that each basement and each relationship we build should be comprised of the best, from excellent craftsmanship to unparalleled communication.

Improve Home Value with a Basement Renovation in King City

A basement renovation in King City can increase the value of your home by approximately 70% of the remodel costs. This percentage can increase up to 80% if you’re adding a basement kitchen. Finished basements are valuable because they increase the amount of livable square footage in your home.

Basement apartments also present the opportunity for additional income if you were to rent it out full or part time. The most valuable type of remodel for your basement are bathroom and kitchen renovations. Adding a basement walkout in King City is also very valuable because it improves privacy and convenience.

Basement Remodeling Ideas

Here are a few exciting remodelling ideas that we can design and build as King City basement renovators:

A King City finished basement can easily become a private gym. In addition to ensuring your basement gym has proper ventilation and adequate airflow, we can also integrate smart home technology to give you enhanced sound and temperature control.

We can give your basement apartment a modern kitchen, luxury bathroom, and a private entrance. Our team will also waterproof your basement to prevent moisture accumulation, water leaks, and flooding.

Turn your basement into the ultimate entertainment place with a full or half bar, kitchenette, or in-home theatre. We will collaborate with you to bring your basement wishlist to life no matter how extravagant it may be.

An in-home basement theatre may have a wet bar for snacks, dimmable pot lights, wall-mounted speakers, a built-in projector screen, and soundproofed walls. Whether you want a classic movie theatre design or an entirely unique design, we can make it happen.

Why Choose Harmony Basements as Your King City Basement Contractors

Harmony Basements is a HomeStars Best of Award winner and we’re active members of RenoMark. We’ve enhanced our King City basement remodel client experience using advanced technologies, including 3D-virtual reality tours with VR goggles and a custom client portal for regular progress updates. Our whole team is also incredibly eco- conscious, ensuring eco-friendly renovations using sustainable materials and environmentally friendly practices. Unlike our competitors, maximizing our profit margins isn’t our primary focus. We offer competitive pricing and flexible financing options to all our clients.

Give us a call today for a free estimate at 1-800-373-7039. Financing is available; please visit our website for more details: https://harmonybasements.ca

Environmentally-Friendly Basement Renovation Experts in King City

Real Reviews

That speak louder than words

My wife and I set out to find a contractor to completely gut and transform our basement into a fully functional suite for our daughter, her boyfriend, his 4-year-old son, and their soon-to-arrive baby.Our requirements were strict: we needed a family room, a kitchen, a 3-piece bathroom, and three bedrooms. Given the limited square footage and the unusual foundation layout of our basement, we knew this would be a major challenge. We needed someone highly creative, experienced, and willing to think outside the box.Most of the contractors we met came in, took basic measurements with tape or a laser, briefly listened to our needs, and quickly quoted us. Almost all of them said that fitting a 3-piece bath and a family room was possible, but having three bedrooms as well was “virtually impossible.” That was until we met Diego from Harmony Basements.From the moment Diego walked in, it felt different. He carefully listened to everything we wanted, then proceeded to take detailed measurements of every part of the basement. That very same night, he sat down and designed a scaled layout complete with a virtual 3D walkthrough that showed us exactly what we had envisioned and more. Diego is an absolute wizard at maximizing every square inch of space. He spent over three hours with us that evening.Then came the question all homeowners dread: “When can you start, and how long will it take?” Without hesitation, Diego confidently said he could start within the week and finish in four to six weeks. He explained that he had dedicated teams for every trade and that a project manager would be assigned to oversee the entire build.When Diego left, my wife and I just looked at each other in disbelief. It felt too good to be true.But Diego kept his word. Within days, we received a clear, detailed, and structured work schedule. Honestly, after receiving such a “Rolls-Royce” level of service in our first meeting, we braced ourselves for a shocking price. To our surprise and relief, the cost was well within our budget.One thing worth noting: Harmony Basements was the only company that included key finishes: bathroom vanity, toilet, plumbing fixtures, kitchen cabinets, sink, and faucet... all in the base quote. Other contractors excluded these or listed them as upgrades.After signing, we were invited to their showroom to select paint colors, kitchen cabinet styles, bathroom tiles, plumbing fixtures, trim details, and more. It felt like designing a brand-new home.Throughout the project, we made a few changes to the layout. Diego and our assigned project manager, Roy, handled all of them without hesitation. In fact, Diego made some excellent suggestions that we happily adopted, such as relocating the entire furnace and ducts to improve the layout. Communication was consistent, and the entire team was professional, respectful, and clearly passionate about their work.Diego, Roy, and the talented crew completed everything exactly on schedule, no delays and no excuses.The finished result is nothing short of spectacular. We’re still amazed at how they managed to turn our challenging basement into a beautiful, spacious, and practical suite with a cozy family room, a large bathroom, and three bedrooms with proper closets. The attention to detail and craftsmanship truly stand out.The process was smooth and stress-free. The team worked diligently, five to six days a week, allowing our daughter and her family to move in earlier than expected.It’s also worth mentioning that Diego doesn’t just do basements. He handles full home renovations of all kinds.. and after this experience, we wouldn’t trust anyone else.If you're looking for a one-stop shop with a professional, trustworthy contractor who delivers exceptional results at a fair price, look no further. Choose Diego and Harmony Basements.. you’ll be glad you did!

James Johnson

14:02 07 Oct 25

My wife and I set out to find a contractor to completely gut and transform our basement into a fully functional suite for our daughter, her boyfriend, his 4-year-old son, and their soon-to-arrive baby.Our requirements were strict—we needed a family room, a kitchen, a 3-piece bathroom, and three bedrooms. Given the limited square footage and our basement's unusual foundation layout, we knew this would be a major challenge. We needed someone highly creative, experienced, and willing to think outside the box.Most of the contractors we met came in, took basic measurements with tape or a laser, briefly listened to our needs, and quickly quoted us. Almost all of them said that fitting a 3-piece bath and a family room was possible, but having three bedrooms as well? "Virtually impossible"—until we met Diego from **Harmony Basements**.From the moment Diego walked in, it was different. He carefully listened to everything we wanted, then proceeded to take detailed measurements of every part of the basement. That very same night, he sat down and designed a scaled layout complete with a virtual 3D walkthrough that showed us exactly what we had envisioned—and more. Diego is an absolute wizard at maximizing every square inch of space. He spent over three hours with us that evening!Then came the question all homeowners dread: *"When can you start, and how long will it take?"* Without hesitation, Diego confidently said he could start within the week and finish in 4–6 weeks. He explained that he had dedicated teams for every trade and that a project manager would be assigned to oversee the entire build.When Diego left, my wife and I just looked at each other in disbelief—this felt too good to be true.But Diego kept his word. Within days, we received a clear, detailed, and structured work schedule. Honestly, after receiving such a “Rolls-Royce” level of service in our first meeting, we braced ourselves for a shocking price. To our surprise and relief, the cost was well within our budget.One thing worth noting: **Harmony Basements was the only company** that included key finishes—bathroom vanity, toilet, plumbing fixtures, kitchen cabinets, sink, and faucet—all in the base quote. Other contractors excluded these or listed them as upgrades.After signing, we were invited to their showroom to select paint colors, kitchen cabinet styles, bathroom tiles, plumbing fixtures, trim details, and more. It felt like designing a brand-new home!Throughout the project, we made a few changes to the layout. Diego and our assigned project manager Roy handled all of them without hesitation. In fact, Diego made some excellent suggestions that we happily adopted, like relocating the entire furnace and ducts to improve the layout. Communication was consistent, and the entire team was professional, respectful, and clearly passionate about their work.Diego, Roy, and the talented crew completed everything exactly on schedule—no delays, no excuses.The finished result is nothing short of spectacular. We’re still amazed at how they managed to turn our challenging basement into a beautiful, spacious, and practical suite with a cozy family room, a large bathroom, and three bedrooms with proper closets. The attention to detail and craftsmanship really stand out.The process was smooth and stress-free. The team worked diligently—5 to 6 days a week—allowing our daughter and her family to move in earlier than expected.It’s also worth mentioning: **Diego doesn’t just do basements**. He handles full home renovations of all kinds—and after this experience, we wouldn’t trust anyone else.If you're looking for a one-stop shop with a professional, trustworthy contractor who delivers exceptional results at a fair price, **look no further**—**choose Diego and Harmony Basements**. You’ll be glad you did!Check out the attached pictures starting from the initial basement through demolition to completion!

James Johnson

21:41 02 Sep 25

This is the second basement project completed with Harmony Basements and we are thrilled with the results. Diego and his team were professional, courteous, friendly and consulted us through the project. Workmanship and details were excellent. Diego helped us navigate through some material supply shortages, common these days, to deliver a top notch design that was on time and budget! Looking forward to enjoying our basement for many years to come. Thanks again!

Dan M

18:18 01 Sep 25

Three words to summarize Harmony Basements: fantastic and highly recommended.We had been considering finishing our basement for some time and spoke with a few contractors, with Harmony being one of them. From the very first meeting with Diego, we felt confident. He came to our unfinished basement, listened to our ideas, and surprised us by quickly preparing a detailed architectural 3D rendering walkthrough of what the finished space could look like, along with a clear price and timeline.Once we moved forward, everything fell into place seamlessly. The process was very organized and the communication was always clear. Diego’s project manager, Roy, took over once construction started, and the team worked efficiently and professionally. Diego had promised the work would be done in six weeks, and they actually finished two days ahead of schedule.I didn’t have any referral or recommendation for Harmony, but I trusted my gut after meeting Diego, and I’m very glad I did. This team truly delivered beyond expectations.If you are looking for a contractor who respects timelines, produces excellent results, and runs projects with professionalism, I highly recommend Harmony Basements.

Rajni Radja

00:48 25 Aug 25

From the moment I sat down with Diego , I knew that he was passionate about what he does and that my basement Reno was in good hands.He has surrounded himself with an impeccable team and the work they do is something that will truly amaze you .Where other companies were requiring that i take care of the permits, Diego put my fears at ease and handled it all , so that I wouldn’t have to.From moving ducts around so that I may have a cleaner ceiling look to extending my accent wall so that the tv does not cover it all, Diego really makes sure that you will be completely satisfied with the finished product.We couldn’t be happier with how our basement came out.A huge Thank You to Diego and the entire Harmony Basements Family for making this project so easy on us and for having us grin from ear to ear with the finished product.

Demetrios B

10:30 07 Aug 25

In 2024, they renovated our 2,000 sq. ft. space into a beautiful suite with a bedroom, walk-in closet, full bath, studio/gym, large storage, living-dining area, laundry, and direct garage access—all within six weeks, as promised.From the start, architect-owner Diego impressed us. He spent hours designing our layout, offered smart advice on function and budget, and delivered a 3D design that fit our lifestyle. His attention to detail—from switch placements to structural integrity—shows his professionalism and experience.A special thank you Roy, the site manager! He far exceeded our expectations; pleasant, knowledgeable, respectful, experienced, and structurally sound. He was very patient with our questions about minor details such as heights of towel rods and mirror! Roy went out of his way to personally make the project successful! Our confidence in Harmony was 100% enhanced by Roy's almost daily presence and his long hours to meet the timeline.Thanks as well to:- Arturo for precise framing and perfect bulkheads and drywalling- Jimmy for high-quality painting—even on weekends- Sasha for her reliable daily coordination- Stephany, our designer, for her current and patient design choicesThe entire crew was respectful, timely, tidy, and efficient. They cleaned up daily, and even hired professional cleaners for the final day—something other companies don’t provide.Diego runs Harmony with honesty, transparency, and no surprises or extras. He even followed up personally on a kitchen cabinet issue within 24 hours. We never once had to chase them after payment, and he stayed just as helpful after the project ended.I’m 110% satisfied with the results of this project. From the design build to the handing over, we were totally happy we picked Harmony for the excellent quality of their work. We will definitely rehire them in the future for any renovation needs.

Katherine Gan

20:59 29 Jun 25

Harmony Basements understands what it means to exceed expectations. We asked them to come and quote us for completely finishing our basement that included a wet bar, 3 piece bath, and podcast studio. Other contractors that we asked for quotes provided one after a 30 minute inspection of the house.Diego spent approximately 3 hours working on the quote at our home, which resulted in a 3D walkthrough and 3 different layout options of what the finished product would look like. His attention to detail, and work put into the quote, as well as his willingness to be flexible on price gave us the confidence to go with him and his team.Add to that, that we had a very tight timeline of exactly 6 weeks, his team of specialized contractors put in the extra hours and weekends to ensure that the project was completed with time to SPARE which served to help us immensely in getting our studio ready for broadcast.There were issues with getting the permit and later some electrical issues, which Diego and his team addressed promptly without having to chase them which was very refreshing to see.In the end, we are 100% satisfied with the result of the build. From design, to the friendliness of his people, to the quality and speed of the work, you would be missing out if you did NOT use Harmony Basements for your needs.They are truly in a class all on their own.

Ryan Davies

13:44 05 Jun 25

We loved working with Diego, Roy and everyone from Harmony Basements. From our initial meeting with Diego it was clear who we were going to choose for our basement renovation. Several times I thought we may have encountered something that would stretch our initial timeline, but if longer days were required then that’s what happened to keep it on time. Always available, clear communication and planning, good people. You won’t be disappointed choosing Harmony for your project.

Taylor Brown

12:30 05 Jun 25

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Limited-Time Exclusive Offer

While Others Cut Corners, We Raise Standards

Free Building Permit for personal use basements

Quality Over Gimmicks

We don’t play the “lowest quote” game, we deliver superior value from day one.

Transparent, Itemized Pricing

No guesswork or hidden fees—see exactly what each line costs and why it’s there.

Free Building Permit

To protect your investment, we handle all architectural drawings, submission, & inspections – at no extra cost.

3D Architectural Design + Virtual Reality Tour

Test-drive your basement design with a realistic 3D walk-through. Powered by technology brought straight to your home.

Book your design consultation now and the building permit service is on us ($2,825.00+ value)

Premium Upgrades – Now Standard

Upgrade:	What you get:
Subfloor System	Low-profile, mould-resistant, fully waterproof. Built-in airflow & insulation.
GRANDEUR® Luxury Vinyl Plank	Choose 33 flood-proof colours – Integrated underlay blocks mould & mildew.
100 % Matching Vinyl Stair Capping	Seamless look from floor to steps—no fragile hardwood stain guessing games.
Waterproof, Mould-Free Envelope	Engineered system that protects your investment from the ground up.

High-Quality Finishes aren’t Extras – They’re Our Baseline.

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Basement Renovation King City

Expect The Absolute Best
“Superior Design • Flawless Execution“

Custom Basement Renovation & Finishing in King City

Basement Renovation in King City

Custom Designed Quality Basements

Improve Home Value with a Basement Renovation in King City

Basement Remodeling Ideas

Why Choose Harmony Basements as Your King City Basement Contractors

Environmentally-Friendly Basement Renovation Experts in King City

DIEGO BOTIA

Book Your Private Showroom Visit with a True Basement & Construction Expert

See why families across Ontario continue to choose Harmony Basements year after year, since 2014

Real Reviews

That speak louder than words

A Great Basement Renovation Begins With A Great Design

Are You Ready To Be WOWED?