How much does it cost to install unfinished solid hardwood and have it site-sanded and finished in a Saint John home?

For unfinished solid hardwood installed and site-finished in Saint John, budget $12–$20 per square foot fully completed — meaning a 1,000 sq ft main floor typically runs $12,000–$20,000 all-in, depending on species, finish complexity, and subfloor condition.

This is a premium approach to hardwood flooring, and for good reason. Unfinished hardwood is installed raw, then sanded smooth across the entire floor as one continuous surface, and finished in place with stain (optional) and multiple coats of polyurethane or hardwax oil. The result is a perfectly flat, seamless floor with no factory edge bevels — something pre-finished hardwood simply cannot match. It's the traditional method used in older Saint John homes and still the gold standard for high-end renovations.

Breaking Down the Costs

Materials for unfinished solid hardwood (red oak, white oak, or maple in 3¼" or wider planks) run $5–$8 per sq ft in the Saint John market. White oak is trending and sits at the higher end; red oak is the workhorse species and the most affordable. For a 1,000 sq ft floor, add 7–10% overage for waste and cuts, so budget for roughly 1,070–1,100 sq ft of material.

Nail-down installation labour adds $3–$6 per sq ft. This includes layout, nailing, and fitting around obstacles. Homes in older Saint John neighbourhoods — particularly the South End, the Hill, and the Uptown — often have original board subfloors that need a plywood overlay (3/8" or 1/2") before hardwood can go down. That overlay adds $1.50–$3.00 per sq ft in materials and labour, and it's non-negotiable for a flat, squeak-free result.

Site sanding and finishing adds another $3–$6 per sq ft. This covers drum sanding, edge sanding, buffing between coats, and typically 2–3 coats of finish. If you want stain, add $0.50–$1.00 per sq ft. Water-based polyurethane dries faster (back in the room in 24 hours) while oil-based provides a warmer amber tone but requires 3–5 days of ventilation — a real consideration in an occupied Saint John home in winter.

Saint John's Coastal Moisture Conditions

Saint John's Bay of Fundy location makes this project more demanding than the same job in Fredericton or Moncton. The persistent coastal humidity, fog cycles, and salt air mean acclimation is absolutely critical — unfinished hardwood needs a minimum of 7–10 days on-site in your home's conditioned space before installation, with your heating system running normally. Rushing this step in a Saint John home is the single most common cause of post-installation gapping or cupping.

Once the floor is finished, maintaining 35–45% relative humidity through the heating season with a whole-home humidifier is essential. Saint John's forced-air heating drops indoor humidity to 20–30% from November through April, which will cause solid hardwood to shrink and develop visible gaps between planks if humidity isn't actively managed. In summer, air conditioning or a dehumidifier keeps moisture below 55% to prevent expansion and cupping.

Practical Tips

Get quotes from at least three flooring contractors and ask specifically whether subfloor prep, stain, and finish coats are included in the price — these line items vary significantly between quotes and make apples-to-apples comparison difficult. Also confirm the contractor uses a moisture meter on both the subfloor and the hardwood before installation; in Saint John's conditions, skipping this step is a red flag.

Site-finishing is not a DIY project. Drum sanders are aggressive and unforgiving — a moment's hesitation leaves visible gouges that require re-sanding the entire area. The finishing coats also require proper ventilation management and experience with NB's humidity conditions to cure correctly.

Need help finding a qualified flooring professional in Saint John? New Brunswick Flooring can match you with local installers for free — browse contractors through the New Brunswick Construction Network directory at newbrunswickconstructionnetwork.com/directory?trade=flooring.