Eavestrough Cost for New Addition in Kemptville

Eavestrough and Downspout Budget for a New Addition in Kemptville

For eavestrough and downspout installation on a new home addition in Kemptville, budget $800 to $2,500 for a typical single-storey addition and $1,200 to $3,500 for a two-storey addition. The wide range reflects the size of the addition, roofline complexity, number of downspouts needed, and whether the new eavestroughs need to tie into your existing system. Kemptville sits in the Municipality of North Grenville, about 50 kilometres south of downtown Ottawa, and most Ottawa-based eavestrough contractors service the area with either no travel surcharge or a modest one of $50 to $100.

The scope of work for a new addition includes several components. The eavestrough trough itself — seamless aluminum is the standard choice — runs $8 to $18 per linear foot installed. A typical addition with 40 to 80 linear feet of gutter line costs $320 to $1,440 for the trough alone. You will need one to three new downspouts at $200 to $600 each, depending on the run length from eave to ground and whether the downspout needs to navigate around windows or architectural features. Downspout extensions or underground drainage connections add $50 to $400 per downspout depending on how far you need to direct water from the foundation.

The most critical detail on an addition project is tying the new eavestroughs into the existing system. Where the new roof meets the existing roof, there is usually a valley or transition point where water from both roof planes converges. This junction needs careful sizing and sloping to handle the combined water volume. If your existing eavestroughs are older 5-inch K-style and the addition creates a larger total drainage area, your contractor may recommend upgrading the shared downspout to a 3x4-inch rectangular size or adding an additional downspout at the junction point. This tie-in work adds $200 to $600 to the project.

Kemptville and the surrounding North Grenville area have a mix of newer subdivision homes and older rural properties. Newer homes typically have eavestroughs in good condition that integrate easily with addition work. Older farmhouses or heritage properties may have aging eavestroughs that should be assessed — if the existing system is near end-of-life, it can be more cost-effective to replace the entire system when the addition eavestroughs go on rather than tying new into deteriorating old.

Timing matters for Kemptville addition projects. Coordinate with your general contractor to install eavestroughs after roofing and fascia are complete but before final grading and landscaping. The optimal installation window in Ottawa and the surrounding region runs from May through October, with fall being the busiest booking period. For addition work, aim to have your eavestrough contractor booked before the roofing stage so there is no gap where your new roof is shedding water without proper drainage.

To find eavestrough contractors who service the Kemptville area, browse the Ottawa Construction Network directory at justynrookcontracting.com. When requesting quotes, provide the addition blueprints showing roof dimensions and drainage points to get the most accurate estimates.