Home Additions
Bellevue · Kirkland · Redmond · Sammamish · Issaquah · Woodinville · Mercer Island · Seattle · Greater Eastside
Moving isn't always the answer. Sometimes your home just needs room to grow. Total Developments designs and builds additions that expand your space, increase your home's value, and look like they were always meant to be there.
Home additions | Bellevue, Kirkland, Redmond & Sammamish
Don't Move,
Improve.
For many Eastside homeowners, moving isn't really the answer. You love your neighborhood, your schools, your community — you just need more space. A well-executed home addition gives you exactly that, without the disruption and cost of uprooting your family.
At Total Developments, we've spent over 25 years building additions that integrate seamlessly into your existing home's architecture, flow naturally from room to room, and add real, lasting value.
Whether you're adding a master suite, converting a garage, building up with a second story, or creating an ADU for extended family or rental income, our team handles every detail from design through final inspection. We serve homeowners across Bellevue, Kirkland, Redmond, Sammamish, and the Greater Seattle Eastside — and we bring the same personal investment to every addition we build.
Home additions | Bellevue, Kirkland, Redmond & Sammamish
What We Handle
Master suite & bedroom additions
Second story additions
ADUs (Accessory Dwelling Units)
Family room & living space expansions
Garage conversions
Mudroom & entryway additions
Permit acquisition & management
Architectural coordination
How we work
Our Process
In-Home Consultation
We start by coming to you. We'll walk through your space, listen to your vision, and talk honestly about what's possible — your goals, your timeline, and your budget. No pressure, no hard sell.
Design & Planning
Once we understand your vision, we get to work on the details. We'll help you work through layouts, materials, and design choices — making sure every decision solves for more space.
Detailed Proposal
You'll receive a clear, itemized proposal outlining the full scope of work, timeline, and investment. No vague estimates, no surprise costs — just straight talk from a team you can trust.
Permits & Pre-Construction
We handle all permitting and pre-construction coordination. Our team manages the details behind the scenes to keep your project moving on schedule from day one.
Construction
Our team is on-site and hands-on throughout the entire build — maintaining quality, communicating progress, and making sure every detail is executed to our standard.
Final Walkthrough
When the work is done, we walk through your new space together. We don't consider a project complete until you're fully satisfied — and we stand behind our work long after the last nail is in.
Home Additions
Why Choose the Total Developments Team?
When you choose Total Developments, you're not just hiring a construction crew — you're partnering with a team that has spent over 25 years earning the trust of Eastside homeowners. We believe in straight talk, reliable timelines, and keeping you informed every step of the way. Ken, Josh, Chris, and Jason are personally invested in every project, because we know the details are what turn a house into a home you'll love for years to come.
Does my project need permits?
Whether you will need permits or not depends on the type of project you're working on.
Projects that typically require a permit:
- Building a new house, garage, or addition
- Finishing a basement, attic, or garage into living space
- Adding or removing walls
- Decks more than ~30 inches high
- Retaining walls 4 ft or taller
- Electrical, plumbing, or HVAC work
- Patio covers, carports, or porches
- Detached sheds over ~200 sq ft
- Replacing windows/doors if it changes the opening size
Projects that DO NOT typically require a permit:
- Painting
- Flooring
- Cabinets or countertops
- Cosmetic interior work
- Small sheds under ~200 sq ft with no electrical/plumbing
- Low-voltage outdoor lighting
Should we hire the cheaper estimate we received?
It depends on why they’re cheaper. A lower price can be great—or a warning sign. Before deciding, compare contractors on a few key factors:
1. Scope of Work -
Make sure the bids include the same work and materials. A cheaper contractor might:
- Use lower-quality materials
- Skip steps (permits, prep work, cleanup)
- Leave out parts of the job that will become extra charges later
2. Reputation & Experience -
Check the following:
- Reviews and references
- Photos of past projects
- Years doing similar work
A contractor with solid experience may save you money by avoiding mistakes and delays.
3. Licensing, Insurance, and Permits -
Confirm they have:
- Proper licensing for your area
- Liability insurance and worker’s comp
- Willingness to pull permits if required
If they don’t, you could be financially responsible if something goes wrong.
4. Communication & Professionalism -
Notice how they handle:
- Written estimates
- Clear timelines
- Responsiveness to questions
Poor communication early usually means bigger issues during the project.
5. Price Outliers
If one bid is much lower than the others, it often means:
- They misunderstood the project
- Plan to cut corners
- Will charge change orders later
What seperates a great contractor from an average or below average contractor?
- Clear communication from the beginning of initial intro meeting. It sets the tone for the entire project and what the consumer gets.
- Detailed planning and organizing.
- Quality control of project of trades.
- Finical transparency.
- Problem solving ability.
- Reputation and reviews.
Do we need a designer?
Whether you need a designer or not typically depends on the scope of the project.
You probably don’t need a designer when:
- You’re doing simple updates (paint, flooring, fixtures)
- You already know exactly what you want
The layout isn’t changing
- Your contractor helps with basic selections
Example: replacing cabinets, countertops, and appliances in the same layout.
- A good contractor can often handle this without a separate designer.
A designer is very helpful when:
- You’re changing the layout
- Moving plumbing, walls, or electrical
- Doing a kitchen or bathroom gut remodel
- You want a cohesive style and material plan
- You’re overwhelmed with hundreds of product choices
Designers also help prevent costly problems like:
- Cabinets not fitting
- Bad traffic flow
- Lighting placed incorrectly
- Materials that clash
Contact
(206) 271-0265
Service Areas
Redmond | Bellevue | Seattle
Sammamish | Issaquah | Woodinville
Total Developments 2026