Navy timber-frame custom home with wraparound deck under construction by Gitter Done Construction in Eastern Washington

Additions, Decks & Exteriors

Additions, Decks & Exteriors That Add Real Space

Home additions, decks, covered porches, siding, garages, and outbuildings — built to match your home and hold up to Eastern Washington weather.

When your house runs out of room — or when the exterior needs to do more work — Gitter Done Construction builds the addition, the deck, the garage, or the siding replacement that solves the problem and looks like it was always meant to be there. We've been doing exterior and addition work across Lincoln County and the greater Spokane area since 2009, and we know how to detail structures that handle our freeze-thaw climate and our wind without coming apart at the seams.

Additions and exterior structures are their own discipline. The connection to the existing building has to be right — structurally and weathertight. The roofline has to integrate, not just be tacked on. The siding and trim have to match. We think through these details in the scoping phase, not after the framing is up, which is why our additions look like additions and not afterthoughts.

What we build

  • Home additions & bump-outs — extra bedrooms, expanded kitchens, flex rooms
  • Decks & covered porches — wood, composite, and covered structures with proper footings
  • Siding install & replacement — board-and-batten, lap, cedar, and engineered siding
  • Garages, shops & outbuildings — detached and attached, sized for how you work
  • Exterior structures — covered entries, pergolas, and outdoor living structures
  • New window & door openings — structural headers, framing, and exterior finish
Navy timber-frame home with deck under construction by Gitter Done Construction in Eastern Washington

For homeowners

An addition is one of the bigger investments you can make in a home you plan to stay in. We scope it carefully — looking at how the addition connects to the existing structure, how it drains, how it's detailed at every exterior joint — because exterior work that isn't done right becomes a leak problem or a rot problem faster than anything else in a house.

Decks and covered porches are a different kind of project: they're about how you use your property and how it feels to be outside on it. We build structures that are sized right for the use, properly footed for frost depth, and detailed to shed water rather than hold it. A deck built right in Eastern Washington will outlast one that was built in a hurry by years.

For businesses

Commercial garages, shops, equipment storage buildings, and exterior additions to existing commercial properties are work we do regularly. We handle the permitting, the structural engineering coordination as needed, and the full exterior build — including concrete approaches and foundations — so you have one contractor to deal with. Learn more about our commercial work.

Cedar-sided home with new concrete walkway installed by Gitter Done Construction
Detached garage with two white overhead doors built by Gitter Done Construction in Eastern Washington

Additions

Structural additions that tie into the existing home properly and look like they belong.

Decks & Porches

Wood and composite decks and covered porches built to handle frost and weather.

Siding

Siding replacement and installation — lap, board-and-batten, cedar, and engineered.

Garages & Shops

Detached and attached garages and outbuildings sized for how you actually work.

Common questions

Do you build decks and covered porches?
Yes. We build decks and covered porches on new construction and as additions to existing homes. We handle the framing, decking, railings, and roofing on covered structures — all permitted and built to code for Eastern Washington's climate.
Can you match an addition to my existing home?
Yes. Matching an addition to the existing structure takes care in the framing connections, the roofline, and the exterior finishes. We work through those details in the design phase so the addition looks like it was always part of the home, not bolted on after the fact.
Do you replace siding?
Yes. We replace siding on existing homes and install new siding on additions and new construction. Whether you're dealing with failing lap siding, want to upgrade to board-and-batten, or need to match a specific profile for an addition, we handle the work from tear-off through the finished installation.

Related: New Construction · Concrete & Foundations · Roofing & Gutters

Ready to add on or renovate the exterior?

Tell us what you want to build — we'll get you a free quote with a clear scope and timeline within one business day.