11 basement renovation companies serve Nepean in Ottawa, including Vanguard Contracting, Select Urban General Contractors, and Ottawa Finished Basements. 10 of them carry a sourced public rating, averaging 4.8 stars; the highest-rated is AMA United Company Inc. at 5.0 stars from 180 reviews. Compare their ratings, service areas, and contact details before choosing who to contact.
Also covers in Nepean: Basement renovation · Basement finishing · Finished basement · Basement contractor · Secondary suite
Serving Nepean
Every basement renovation company below lists Nepean in its Ottawa service area. Compare ratings and services, then contact the business directly.
FeaturedKanata +7
5.0(84)on GoogleChecked Aug 2026Basement FinishingVanguard Contracting is an Ottawa basement renovation company serving homeowners across the city, offering basement finishing and basement renovation. It holds a 5.0-star average across 82 Google reviews.
View Vanguard Contracting
FeaturedNepean +6
5.0(67)on GoogleChecked Aug 2026General ContractorsOttawa residential renovation contractor offering full-home, kitchen, bathroom, and basement renovations plus additions, coach houses, and accessible renovations with in-house design and 3D planning. BBB-accredited with an A+ rating and serves neighbourhoods across the city.
View Select Urban General Contractors
Kanata +7
5.0(30)on GoogleChecked Jul 2026Basement FinishingOttawa company specializing in basement finishing and renovations, transforming unfinished basements into living space.
View Ottawa Finished Basements
ClaimedKanata +7
4.9(29)on TrustedProsChecked Jul 2026General ContractorsFamily-owned Ottawa home renovation contractor operating since 2009, offering kitchens, bathrooms, basements, additions, coach houses, and mobility renovations across the city. Named Best of TrustedPros in 2024 with a strong review history on HomeStars and TrustedPros.
View RenosGroup
FeaturedBarrhaven +6
5.0(180)on GoogleChecked Aug 2026FencingAMA United Company Inc. is a fence contractor in Ottawa. Rated 5 from 179 Google reviews.
View AMA United Company Inc.
ClaimedNepean +6
4.7(37)on GoogleChecked Aug 2026General ContractorsOttawa design-build contractor established in 2005 for kitchens, bathrooms, basements, whole-home renovations, additions, accessibility upgrades, and commercial spaces.
View Dream Touch Renovations
Kanata +7
4.2(20)on GoogleChecked Jul 2026Basement FinishingOttawa basement design-build firm specializing exclusively in finished basements and basement renovations, with decades of local experience.
View Just Basements
Nepean +4
4.4(233)on GoogleChecked Aug 2026General ContractorsHigh-volume Ottawa design-build renovation company based in Nepean, offering kitchen, bathroom, and basement renovations, home additions, coach homes, and custom homes. One of the most-reviewed renovation firms in the city.
View Ottawa General Contractors (OGC)
Barrhaven +6
4.9(40)on GoogleChecked Aug 2026Basement FinishingOttawa Home Renovation by Greenlight Renovation is a general contractor in Ottawa offering general contracting. Rated 4.9 from 40 Google reviews.
View Ottawa Home Renovation by Greenlight Renovation
Barrhaven +5
4.9(140)on GoogleChecked Aug 2026Windows & DoorsWestend Windows and Doors is a door supplier in Ottawa offering window installation and windows. Rated 4.9 from 140 Google reviews.
View Westend Windows and Doors
Nepean +2
Basement WaterproofingOttawa-area waterproofing company covering interior and exterior basement waterproofing, weeping tile, sump pumps and backwater valves. Provides a 3-year labour warranty and free online quotes.
View iBasementsBefore you hire in Nepean
In Ottawa finishing a basement requires a building permit where the work involves installation, erection, extension, or material alteration or repair.
That covers most real basement finishes, including framing new rooms. Damp proofing an existing basement is separately exempt, and creating a basement apartment can require a plumbing permit as well.
Designated heritage buildings and properties inside a Heritage District Overlay are not covered by these exemptions, and the City asks owners to confirm with a Building Client Service Centre before starting.
Source: City of Ottawa: Projects not requiring Building Permits. Confirmed 2026-08-23. Thresholds change, so check before you build.
Common questions
Hiring in Nepean
Nepean is a large, established area in Ottawa's central-south, covering neighbourhoods like Barrhaven's northern edge, Bells Corners, and Centrepointe. Its housing stock skews older than the newer suburbs, so renovations, roof and window replacements, basement waterproofing, and mature-tree work are all common here. Central Nepean's location makes it easy to reach for most Ottawa service businesses, including those below.
Finishing over a damp basement traps the problem behind new walls. A good contractor checks for water and addresses waterproofing or drainage before framing starts.
A finished basement, and especially a bedroom or secondary suite, needs City of Ottawa permits and code-compliant egress windows. Confirm the contractor handles this; it protects resale and safety.
Basement Finishing in nearby areas
Other trades serving Nepean
For homeowners
Tell us about the job and we will suggest up to three basement renovation companies that list Nepean as a service area.