The largest factors are size, demolition, foundation or framing, material level, roof complexity, stairs and railing, glazing, electrical or HVAC work, access, permits, engineering, and hidden site conditions. A detailed scope is more useful than a square-foot price because two projects of the same size can require very different work.

Timing depends on design, permit review, engineering, product lead times, inspections, weather, and the project’s complexity. A straightforward deck or patio may move faster than a custom sunroom, enclosure, or roof system. ModExt will provide a project-specific schedule after the scope and approvals are confirmed.

Yes. ModExt Construction serves homeowners in Portsmouth for custom decks, porches, sunrooms, screen rooms, porch and patio enclosures, patio covers, pergolas, pavilions, louvered roofs, and related outdoor-living improvements. Service availability is confirmed using the project address and scope.

Possibly. A current survey or plat may be required to show property lines, setbacks, easements, and the proposed structure. Homeowners are responsible for providing a survey if requested or required by the permitting authority. HOA or architectural approval is separate from city or county permitting and should be checked early.