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Finished basement living space by Mighton Construction in South Georgian Bay

Basement Finishing · South Georgian Bay

Basement Finishing & Renovation in South Georgian Bay

Transform your unfinished basement into comfortable, functional living space. From recreation rooms and home offices to legal rental suites — built properly for our climate.

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  • 2026 Canadian Choice General Contractor of the Year
  • Building in South Georgian Bay since 1992
  • Certified Nudura & Foxblocks ICF builder

Why Homeowners Choose Mighton

100%
Permitted & Inspected
30+
Years Building Here
5.0★
27 Google Reviews
$5M
Liability Coverage
2026 Canadian Choice General Contractor of the Year 2025 Wasaga Beach Chamber Trades Business of the Year

Basement Contractors Near You

Wasaga Beach

Basement finishing and ICF basements in Mighton’s home town.

Finishing ICF Suites

Collingwood

Finished basements and secondary suites for Collingwood homes.

Finishing Bathrooms Suites

Basement finishing

The Most Affordable Square Footage You’ll Ever Add

Your basement represents a significant amount of untapped living space. A properly finished basement can add a recreation room, home office, guest suite, home theatre, or even a legal rental unit to your home — all without changing the footprint of the building.

Mighton Construction finishes basements to the same standard we apply to the rest of the home, so the space feels like a natural extension of your living area, not an afterthought. Built for South Georgian Bay conditions — our clay-heavy soils, high water tables, and freeze-thaw winters — every basement starts with moisture and insulation done right.

Basement renovation project by Mighton Construction

What we build

A Whole Floor of Untapped Living Space

Finished properly, a basement feels like a natural extension of your home — not an afterthought. Whatever your family needs, we build it to the same standard as the floors above.

  • Recreation & family rooms — comfortable, well-lit spaces for everyday living and entertaining
  • Guest bedrooms — code-compliant bedrooms with egress windows, closets, and bathroom access
  • Home offices — dedicated workspaces with proper lighting, electrical, and soundproofing
  • Basement bathrooms — three- and four-piece bathrooms, including below-slab plumbing rough-ins
  • Legal secondary suites — self-contained apartments meeting Ontario Building Code for fire separation, HVAC, and egress
  • Home theatres — soundproofed rooms purpose-built for media, games, and recreation
Finished basement recreation room with bar by Mighton Construction in Wasaga Beach

Moisture first

A Dry Basement Before a Finished One

A beautiful basement over an unresolved water problem is wasted money. In South Georgian Bay, clay soils, high water tables, and freeze-thaw cycles make moisture the first question in every basement. We assess it before finishing and resolve it properly — a finished basement over standing damp is a recipe for mould and rot.

  • Thorough moisture assessment before any finishing begins
  • The right fix for the problem — exterior waterproofing, interior drainage, sump systems, or vapour barriers
  • Foundation condition checked alongside water management
Finished basement games room by Mighton Construction near Blue Mountain

Built for our winters

Insulated, Permitted, and Inspected

A comfortable basement in our climate needs proper insulation against the foundation walls — rigid or spray foam creating a continuous thermal and vapour barrier that prevents condensation and keeps the room warm. Improper insulation is the most common cause of mould in finished basements, so it is not a place to cut corners. Every finished basement also requires permits and inspections, and we manage the whole process.

  • Continuous thermal and vapour barrier against the foundation, sized for cold winters
  • Egress windows and proper ventilation where bedrooms and bathrooms require them
  • Framing, electrical, plumbing, and insulation permitted and inspected in every local municipality
Bright daylight basement playroom by Mighton Construction in Wasaga Beach

Secondary suites

Thinking About a Legal Basement Apartment?

A legal secondary suite can generate meaningful rental income or house family independently — but the code requirements are significant: separate entrance, fire separation, ceiling height, egress windows, and independent HVAC. We advise honestly on feasibility before you spend, and manage the full approval process when it’s a go.

  • Feasibility review of ceiling height, egress, and entrances before design
  • Fire separation and sound attenuation built to Ontario Building Code
  • Independent heating, ventilation, and electrical where required
  • Full permit and inspection management, start to finish
Bright basement in-law suite with full kitchen by Mighton Construction

Why Mighton

Basements Finished to Main-Floor Standards

The ICF basement work Jeff and Adam oversee has earned some of our strongest reviews — because below grade is where construction quality shows. Open-book pricing, moisture done right, and finishes that match the rest of your home.

Jeff Mighton

Jeff Mighton

Founder & President

Adam Mighton

Adam Mighton

COO & Project Manager

Basement home theatre with tiered seating by Mighton Construction

Get started

Let’s Look at Your Basement

Book a no-obligation assessment and we’ll evaluate the space, check ceiling height and mechanical obstructions, identify any moisture concerns, and give you a realistic budget for finishing it properly. From there we develop a layout that maximises usable square footage and handle the permits through to the final finishing details.

Finished basement home office and gym space by Mighton Construction in Collingwood

Recent Projects From Our Gallery

Real photos from Mighton projects across South Georgian Bay.

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Our Work

From the Mighton project gallery

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Our Work

From the Mighton project gallery

Mighton Construction project photo 3

Our Work

From the Mighton project gallery

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Our Work

From the Mighton project gallery

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Investment

Basement Budget & Planning Guidance

Basement finishing typically ranges from $65–$150+/sqft, depending on the level of finish, bathroom inclusion, and whether the space is designed as a legal secondary suite.

Costs vary by design, site conditions, materials, drawings, and approvals. These planning ranges are not quotes.

$65–$95 /sq ft

Comfortable

Recreation room, quality flooring and lighting, and straightforward layout — the essential finished basement.

Most common

$95–$130 /sq ft

Complete

Bedroom, full bathroom, storage, and upgraded finishes throughout — most popular for family homes.

$130–$150+ /sq ft

Suite-Ready

Legal secondary suite or premium build-out with kitchen, fire separation, and independent systems.

Our Basement Finishing Process

01

Assessment & Moisture Evaluation

We inspect your basement for moisture issues, evaluate the foundation condition, measure ceiling height, and identify mechanical obstructions that will affect the layout.

02

Design & Layout Planning

We develop a floor plan that maximises usable space while accommodating mechanical systems, egress requirements, and your intended use of the space.

03

Permitting

We secure building permits, which are required for finished basements. Secondary suite applications involve additional requirements including fire separation and separate HVAC.

04

Framing, Insulation & Mechanical

Walls are framed, insulation is installed against the foundation, and any plumbing, electrical, and HVAC work is completed and inspected.

05

Finishing

Drywall, flooring, trim, paint, bathroom fixtures, and all finishing details are completed. We ensure the space feels like a natural extension of your home.

Start Planning Your Basement

Your information is secure and will never be shared. We respond to serious enquiries within 1–2 business days.

What happens next?

  1. 1We review your project details within 1–2 business days.
  2. 2We schedule a call or meeting to understand your goals.
  3. 3If it's a good fit, we provide early guidance and next steps.

Initial consultation: Free

Response time: Within 1–2 business days

Phone: 705-809-5809

Email: [email protected]

Mighton Construction is best suited for larger residential, cottage, and church projects. We are not a handyman or small-repair service.

Client reviews

What Our Basement Clients Say

They just finished our ICF basement in Wasaga Beach, and the results are incredibly solid and perfectly executed. Jeff and Adam were exceptional, overseeing every detail with expertise. It’s a huge piece of our new home, and knowing it’s built with such care gives us so much peace of mind.

Matthew Svoboda · Wasaga Beach · ICF Basement Google review

Common questions

Frequently Asked Questions

How much does it cost to finish a basement?
Basement finishing typically ranges from $65–$150+/sqft. A basic recreation room with a bathroom falls on the lower end. A fully finished space with a kitchen, high-end finishes, and a bathroom is at the higher end. Legal secondary suites require additional investment for fire separation, egress, and separate HVAC.
Do I need a permit to finish my basement?
Yes. Finishing a basement requires a building permit in all South Georgian Bay municipalities. The work involves framing, electrical, plumbing, and insulation — all of which must be inspected. We handle the entire permit process.
What about moisture and water issues?
We assess moisture conditions before any work begins. Solutions may include exterior waterproofing, interior drainage systems, sump pumps, or vapour barriers. We will not finish a basement that has unresolved water problems — addressing moisture first protects your investment.
Can I build a legal rental suite in my basement?
In many municipalities, yes — but the requirements are significant. Legal secondary suites need separate entrances, fire separation, adequate ceiling height, egress windows, independent HVAC, and compliance with Ontario Building Code Part 9.36. We can advise you on feasibility and manage the entire process.
My basement has low ceilings. Can it still be finished?
Ontario Building Code requires a minimum ceiling height of 6 feet 5 inches for habitable rooms (higher for secondary suites). If your ceilings are too low, options include underpinning or bench footings to lower the floor — a significant but achievable project that we have completed successfully.
What are the egress requirements for basement bedrooms?
Every basement bedroom needs a code-compliant escape route — typically an egress window with minimum opening dimensions and maximum sill height. We factor window wells, excavation, and structural lintels into the design and permit drawings from the start.
Can you soundproof the basement from the floor above?
Yes. Insulated joist cavities, resilient channel, and acoustic drywall dramatically cut sound transfer — worth it for home theatres, teen hangouts, and especially secondary suites, where sound separation makes the difference between a good tenancy and a strained one.
How do you keep a finished basement from feeling like a basement?
Ceiling height management, generous pot lighting layered with warm fixtures, properly sized windows, and the same finish quality we use on the main floor. Mechanical runs get planned around the layout — not boxed in as afterthoughts that chop up the ceiling.
Do you finish basements in brand-new homes?
Yes — and if the home is still being planned, talk to us about an ICF foundation, which delivers a warm, dry basement that is finishing-ready from day one. In new conventional builds we confirm the foundation has cured and drainage performs before finishing begins.
How does your open-book, cost-plus pricing work?
You pay the actual cost of materials, labour, and subcontractors, plus a clearly defined management fee — and you see every invoice along the way. There are no hidden markups or padded allowances. It keeps our interests aligned with yours: we have no incentive to cut corners, because we do not profit from the difference.
Do you handle building permits and inspections?
Yes. Depending on the project scope, we coordinate or fully manage permits with the municipality, arrange required inspections, and handle conservation authority applications where properties in South Georgian Bay need them. Every project we build is permitted and inspected.
Can you work from plans we already have?
Absolutely. We regularly price and build from completed architectural drawings. If you are earlier in the process, we can also coordinate design and pre-construction planning with architects, designers, and engineers we trust.
Are you licensed and insured?
Yes. Mighton Construction Limited carries $5 million in aggregate liability coverage and maintains WSIB coverage for applicable work, with clearance information available on request. All work is built to Ontario Building Code and inspected by the local building department.
What happens after I submit the contact form?
We aim to respond to serious project enquiries within 1–2 business days. The first step is a free phone conversation about your goals, timing, location, and rough budget. If the project is a good fit, we arrange a site visit and provide early guidance and a ballpark estimate.
How far in advance should we get in touch?
Earlier than you think. We intentionally take on a limited number of projects each year so Jeff and Adam stay personally involved in every one — which means our calendar fills ahead of the season. Talking early also gives design, permits, and material lead times the room they need.

Related Services

Whole-Home Renovations

Include your basement as part of a comprehensive home renovation.

Explore Whole-Home Renovations

Bathroom Renovations

A bathroom is often the most valuable addition to a finished basement.

Explore Bathroom Renovations

Home Additions & Garage Builds

When a finished basement is not enough, consider an addition for more living space.

Explore Home Additions & Garage Builds

Let’s Look at Your Basement

Book a no-obligation assessment. We’ll evaluate the space, check for moisture concerns, and give you a realistic budget for finishing it properly.

Plan Your Basement Project