Basement Renovation East Gwillimbury

Harmony Basements specializes in East Gwillimbury basement renovations. We plan, design, and build basements from start to finish. Our team handles the permits, waterproofing, framing, electrical, plumbing, flooring, and final finishing based on your goals.

Book a Design Meeting

Call Now

Expect The Absolute Best
“Superior Design • Flawless Execution“

Diego Botia, (B.Arch) Architect

Newmarket Basement Renovation Project by Harmony Basements

Searching for licensed basement contractors to build your finished basement for a home office, gym, bar, legal apartment, family room, guest space, or organized storage? We’re here to help.

If your basement has become a catch-all for storage bins, old furniture, seasonal decorations, and things you rarely use, you’re not alone. Call or email our team to start the process with a design meeting. Our consultations are cost-free with no obligation required.

Basement Renovation in East Gwillimbury

Harmony Basements works throughout East Gwillimbury and beyond, from Holland Landing and Queensville to York Region. We assist with unfinished basement conversions, older basement remodels, and legal basement suites.

We perform and manage every stage of the project. This begins with permits, planning, and design, developing a layout that works around existing stairs, support posts, ductwork, plumbing lines, and mechanical systems.

We can build one designated space, such as a guest suite, or create a combination of rooms including a bar, theatre room, and game room. Here’s a list of what’s included in our services:

Layout planning and space optimization
Architectural design and 3D renderings
Permit applications and coordination
Framing, insulation, and drywall
Waterproofing and moisture protection measures
Electrical wiring, light fixtures, and plumbing work
Basement bathroom and/or kitchen design and construction
Flooring, trim, doors, windows, and wall coverings (paint, tile, etc.)

What Our Basement Renovation Service Includes

Our team delivers a fully finished basement designed to meet your needs and vision. We take you from concept development through project execution. Our services are complete with architectural and interior design, construction, mechanical work, and final finishes. Here’s a closer look at what this means for you and your basement:

Planning & Design: Custom floor plans, 3D design renderings, and immersive virtual reality (VR) tours that help you visualize your new basement before demolition begins.
Waterproofing & Finishing: Inspect for moisture issues and apply waterproofing solutions where needed. This is followed by framing, insulation, drywall, flooring, lighting, trim, and finishes.
Basement Bathroom Renovations: Addition of a full or partial basement bathroom with waterproofing, ventilation upgrades, electrical work, plumbing installations, as well as custom finishes and fixtures.
Basement Kitchen Renovation: Design and construction of a wet bar, kitchenette, and/or full kitchen. Includes custom cabinetry, electrical wiring, appliance hookups, plumbing system installations, and fixture installations.
Legal Basement Suite: Building code compliance, permit applications, and coordination of inspections in accordance with local regulations. Custom designs, layouts, and finishes to fit desires.

Basement Finishing East Gwillimbury

Many homes in East Gwillimbury need more living space, but you shouldn’t have to go through the cost and disruption of moving. in order to get it. Basement finishing gives you the extra room you need within your existing home.

If your basement still has concrete floors, exposed ductwork, unfinished walls, or little insulation, you’re paying for square footage you can’t fully use.

We build out the basement structure by framing new rooms, installing insulation and applying vapour barriers for moisture and temperature control, then finish walls with drywall and painting or tiling. Ceilings, flooring, and trim are done with proper subfloor preparation where needed.

Electrical and plumbing rough-ins are coordinated early to support bathrooms, offices, or living spaces, while lighting, storage, and layout details are planned around how you intend to use the finished basement.

Basement Remodeling for Older or Outdated Basements

Amazing Dining Room with Fireplace in Finished Basement Woodbridge

If your basement is already finished but feels dark, damp, or hard to move through, a remodel can help optimize the original build rather than starting from scratch.

Harmony Basements revamps finished basements by opening up and/or reconfiguring the basement layout, replacing outdated finishes, and fixing problem areas that affect comfort and usability.

We’ll replace worn flooring, improve lighting, update old trim and materials, and modernize key areas such as basement bathrooms and kitchens that no longer meet your needs or standards.

Storage is added or rebuilt, and awkward rooms are reworked into practical spaces. We also address insulation, moisture concerns, and other comfort or code-related issues that may have been overlooked in the original basement renovation.

Legal Basement Suites and Basement Apartments

The process of designing and constructing a legal basement suite involves more than layouts and finishes. A legal basement suite in East Gwillimbury may require permits, fire separation, egress windows, safe exits, electrical updates, plumbing, ventilation, and inspections before it can be used as a rental unit.

Our team will help you understand the renovation requirements to create a basement apartment that complies with local building codes, safety requirements, and zoning regulations. Being a licensed and experienced basement renovation contractor, we guarantee the alignment of your basement’s design and construction with these requirements.

Examples of the steps we take include fire-rated egress windows, fire alarm hookups, coordinating mechanical systems with certified plumbing and electrical teams, and making sure access points and room sizes support code expectations before finishing work begins.

Basement Waterproofing Before Renovation

Before finishing a basement, Harmony Basements checks for signs of moisture and water damage. This is because water issues should always be handled before the drywall, flooring, insulation, and cabinetry are installed.

Common problems in East Gwillimbury include water seepage, damp walls, damaged or outdated sump pumps, blocked drainage systems, foundation cracks, poor insulation, and a lack of moisture-resistant materials.

We address problems first to protect your new finishes and prevent recurring damage after the basement is complete. Skipping this step can lead to mould, mildew, water-damaged furniture, warped flooring, and costly repairs.

Basement Design, Layouts, and 3D Planning

At Harmony Basements, we develop basement designs using 3D modelling and VR tours. You get to review various basement layout options before demolition and construction.

Our expert architectural and engineering teams arrange room placement around real, project-specific constraints such as structural posts, beams, ductwork, stairways, and HVAC systems.

Bathrooms, storage areas, kitchens or wet bars, and living spaces are organized in practical locations that allow for improved flow, convenience, and everyday comfort.

We consider every detail, big and small, including artificial and natural lighting, flooring transitions, and finishing selections. Decisions are made in collaboration with you, based on the integrity of your vision, material durability, and the purpose of the space.

How Much Do Basement Renovations Cost in East Gwillimbury?

basement renovation comparison before/after

The cost of a basement renovation in East Gwillimbury depends on the square footage, structural work, waterproofing needs, bathroom or kitchen additions, legal suite requirements, permits, and finish selections.

Adding a bathroom or kitchen increases the cost due to the additional plumbing, ventilation, and electrical work that’s required. Custom design features can also raise expenses. For example, smart-home integration, custom built-ins, heated flooring, etc., can all impact the final basement renovation cost.

The existing condition of your basement is another factor to consider. If repairs are needed before we can begin construction, there are additional costs for added time, materials, and labour.

Why Choose Harmony Basements?

Harmony Basements focuses only on basements, not general home renovations. That means every part of our process, from framing below-grade walls to managing moisture risks and layout constraints, is built around basement-specific problems, layouts, and conditions.

Harmony Basements specializes exclusively in basements, not general home renovations. This means every step of our process, from framing below-grade walls to addressing moisture risks and layout challenges, is tailored to the unique characteristics, layouts, and conditions of basements.

Here’s why our past and present clients choose Harmony Basements:

Basement-only renovation company with deep experience in below-grade construction challenges.
Design-build process that connects 3D design, layout planning, and construction before framing starts.
Detailed pre-construction planning that accounts for posts, beams, ductwork, low headroom, and mechanical room access
Consistent project communication so you always know what stage your basement renovation is in and what comes next.
Proven project portfolio displaying finished basements, legal suites, and layout redesigns across different home types.
Material guidance based on real basement performance, not standard above-grade interior choices.

Book Your Basement Renovation in East Gwillimbury

Ready to start talking plans, layout, and renovation goals? Contact Harmony Basements today to book a design meeting for your basement renovation in East Gwillimbury. Our team’s here when you’re ready to get your free, no-obligation estimate and consultation.

Call Us

FAQs

How much does an East Gwillimbury basement renovation cost?

Basement finishing costs and basement renovation costs are based on project size and scope. Factors that influence costs include square footage, design, materials, labour, and finishes. Additional expenses can come from repairs, structural work, permits, and mechanical work.

Do I need a permit for a basement renovation in East Gwillimbury?

Permits may be required if your basement renovation involves structural changes, plumbing, or electrical work. This applies to the addition of basement bathrooms, kitchens, separate entrances, and legal basement suites.

Can I build a legal basement apartment in East Gwillimbury?

Building a legal basement apartment requires compliance with zoning bylaws, obtaining permits, ensuring fire separation, installing egress windows and emergency exits, meeting minimum ceiling heights, providing proper ventilation, and passing electrical and plumbing inspections conducted by certified professionals.

What is included in basement finishing?

Basement finishing includes framing, insulation, drywall, flooring, lighting, ceiling, trim, paint, doors, electrical, and optional bathroom/kitchen work.

Should waterproofing be done before finishing a basement?

Yes, water and moisture checks should take place before drywall, flooring, and insulation. This prevents damage to new materials and finishes and protects you from the risk of mould, structural weakness, and flooding.

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

‹

›

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.

Request your consultation today
and lock in the current Bonus before it’s gone

Basement Renovations East Gwillimbury