Sherwood Home Additions

Adding on in Sherwood: the lot decides first, the design second

Before anyone sketches a new primary suite or a bigger family room, an addition has to answer a plain question: where on this lot is the house allowed to grow? In Sherwood, where most homes stand on subdivision lots laid out in the 1990s and 2000s, that answer sets the size and shape of everything that follows. JDI Construction is a family-owned design-build remodeler based in Vancouver, WA, in business since 2007. We check the property and the rules, then design an addition that connects to your existing foundation, framing and roof. An addition is part of your house and shares its systems. If you want a separate, self-contained dwelling, that is an ADU, which follows a different set of rules.

Since one team at JDI handles both the drawings and the construction, the structural connection is worked out during design. The builders are not discovering on site that a roof pitch or a floor height does not line up.

Where new construction meets the existing house

An addition is judged at its joints. These four areas get resolved on paper before a footing is dug:

1. 1
   

   Structure & loadEvery opening cut into an existing wall needs a header or beam, and the weight above it needs a clear route to the ground.
2. 2
   

   Tying inFloor levels aligned, the new roof joined to the old one so it drains properly, and siding and trim that continue without a visible break.
3. 3
   

   SystemsWhether the furnace, panel and water heater can carry the extra space, or the addition needs its own capacity.
4. 4
   

   Setbacks & permitsHow close to each property line you may build, how much of the lot may be covered, and the plan review that confirms it.

Questions to settle before design begins

Direction is the first one. Extending at ground level is the simpler build where the yard allows it. Going up preserves the yard but puts new weight on the existing foundation and walls, so an engineer has to confirm they can take it. Purpose is the second: a bedroom suite needs plumbing and a sensible route from the rest of the house, a family room extension mostly needs structure and light, and an office may need neither. The third is how the house will function during the build. For most of the project the addition is a separate shell, and we open the connection to the house late so you stay weather-tight and comfortable. Agree on these three and the design moves quickly.

What Sherwood homeowners add on for

Sherwood's houses are mostly from its growth years, when the population rose from about 3,000 in 1990 to over 18,000 by 2010. Two things follow for additions. First, matching is easier than on an older house: the siding profiles, trim and window styles used in that period are still broadly available, so new walls can be made to read as original. Second, space on the lot is the tighter constraint. A typical subdivision lot leaves limited room between the house and its setback lines, so a modest rear extension, a bump-out to enlarge a kitchen or primary bath, or a room over the garage are often the realistic options. Your addition will go through the City of Sherwood for zoning and building review, and if your neighborhood has a homeowners association with design review, exterior changes normally need its approval too. We prepare the drawings both will ask for.

Properties in Old Town are a separate case. The original town plat dates to 1889, the lots and houses do not follow a subdivision pattern, and the city applies an Old Town overlay with its own standards on top of the base zoning. An addition there starts with a conversation with city planning about what the overlay requires, and matching older siding, trim and window proportions takes more care.

What does a home addition cost in Sherwood?

It depends on what kind of addition you are building. A small bump-out on a short foundation wall is a much lighter project than a full room with its own roof, and both are lighter than a second story. Beyond type, the drivers are square footage, whether the space includes a bathroom or other plumbing, how much of the existing house is altered to connect to it, and whether mechanical or electrical capacity has to be increased. Engineering, permit fees and site work are real costs that belong in the budget from the start. We give you an itemized estimate after the addition has been designed for your house and lot, since a per-square-foot guess made earlier would not hold.

How long does a home addition take?

An addition has more stages than an interior remodel, and several of them happen before construction: measured drawings, design, structural engineering and permit review. Building then proceeds from foundation to framing, exterior shell, rough-in, insulation and interior finishes, with inspections along the way. All of that adds up to months. Weather matters for the foundation and framing stages in a western Oregon winter, so we plan the start date with the season in mind and give you a milestone schedule you can track in the client portal.

Why Sherwood homeowners hire JDI

With an addition, the design, the engineering and the build have to agree with each other, and that is easier when one team is accountable for all three. We manage the permits, coordinate the work and back it with a 5-year workmanship warranty. We are also candid about where we are coming from. JDI is based in Vancouver, WA, and Sherwood is on the southwest side of the metro, about as far across the region from us as our service area goes. We take on projects there and plan for the travel: site days are scheduled in advance and you always know who is coming and when.

JDI Construction. "Built by family. Trusted by neighbors." Family-owned design-build remodeling and home additions since 2007, based in Vancouver, WA, and working in Sherwood and neighboring Tualatin and Newberg.