Vancouver ADUs are decided by four things before a single line is drawn: which jurisdiction permits your parcel, whether the water meter and electrical service can carry a second dwelling, what system development charges will total, and what it costs to trench utilities to the back of the lot. Serden Group answers all four in writing during feasibility, then builds the unit through to a certificate of occupancy. One licensed team, one project manager. Locally trusted since 2015.
Every Vancouver ADU we build starts with the same conversation, and it is not about finishes. Salmon Creek and Hazel Dell addresses permit through Clark County while city addresses go through Community Development — different codes, fees and queues. A 100-amp panel will not carry a second kitchen, laundry and heat pump. System development charges for water, sewer, traffic and parks land in the five figures and are assessed separately from the building permit. And the trench from the house to a rear-yard unit is real money. We price all of it before design, so the budget you approve is the budget you build to.
Detached units, attached units, above-garage builds, and garage and basement conversions — for parcels inside Vancouver city limits and across unincorporated Clark County. Feasibility, engineered plans, permits, site work, utilities and finishes under one contract.
A standalone unit in the back or side yard on its own foundation — kitchen, full bath, bedroom, and its own entry and address.
Built off the existing house on a new footing line, with a separate exterior door and a code-compliant separation wall.
Converting space you already own — insulation, egress, ceiling height, a new kitchen and bath, and a legal second address.
A second story over an attached or detached garage, with the foundation and shear capacity verified before design starts.
We confirm whether your address is inside Vancouver city limits or unincorporated Clark County — the two have different applications and different review — then measure your lot against your zone’s setbacks, lot coverage and height limits. You get an honest go, a build-up-instead recommendation, or a no, plus a realistic budget range before you pay for design.
Floor plans, elevations and stamped structural drawings, then submittal and plan-review management with the City of Vancouver or the Clark County Permit Center. We handle correction responses, the stormwater plan when a project crosses the impervious-area threshold, and the system development charges tied to added square footage.
Footings, framing, roof tie-in, mechanicals, then finishes — with your kitchen and bathrooms kept in service and the work zone sealed and dust-controlled. One project manager, daily progress, and a punch-list walkthrough before we call for final inspection.
Why Homeowners Choose Serden
Homeowner Stories
Real reviews, quoted word for word from the sites our clients left them on. Every card links back to that site.
Across 400+ reviews on 9 platforms
Also rated on Houzz, Facebook, Nextdoor, BBB (A+ rating) and Networx.
Read all 400+ reviewsThe project was finished on time and within budget. There was outstanding communication from start to finish and meticulous attention to detail. They are a contractor that goes the extra mile and I would definitely recommend.
Fantastic experience! They renovated my entire home with new floors, a full kitchen remodel, and a bathroom upgrade. The kitchen looks amazing with new cabinets, countertop, and appliances, and the bathroom to shower conversion turned out beautifully. Great quality work, finished on time, easy to communicate with, and their pricing was very competitive. Highly recommend!
We were very happy with the workmanship on our upstairs, downstairs and stairs flooring. Very friendly and were very accommodating to our home schedule and would recommend them to anybody who needs work to be done in their home
Serden remodeled our kitchen, dining room, living room and entry way. Dennis and Alex were especially friendly and easy to communicate with. Every person we had contact with was professional and did quality work. When unexpected issues came up, they solved the problems efficiently so we didn't have to stress about anything. They worked really hard to make sure we were happy at each step of the process. We love our new living space!
I purchased my first home a couple years ago, which was a time capsule from the 60s/70s. I got multiple quotes on getting my house updated. I of course wanted the updates to be budget friendly, but quality enough to last for years to come. Serden Group helped make suggestions that saved me money (to no benefit to themselves). With some of the other quotes I received I couldn't understand where so much of the cost was coming from and the quotes themselves were not clear in what I was being charged for. Serden Group however was very transparent in their pricing. The work they did is absolutely beautiful. Communication was consistent and timely. Their crew is incredibly kind and professional and cleaned up everyday. I think the scariest thing for most people getting work done our their homes is finding a trust worthy company to do so. There are too many occasions of companies having inflated pricing, hidden expenses, shoddy work, or poor communication. If you're looking for a company you can trust and to treat your home with the best care, give these guys a call.
We have used Serden Team for 3 projects. They remodeled our master bedroom and bathroom, refaced kitchen cabinets and built a beautiful surround for my refrigerator so it looks built in and remodeled a secondary bathroom. Their work is fantastic. They are easy to work with and communication is the best. I can trust them to do a great job and do the work properly the first time. Wonderful company and will refer them gladly.
They did an excellent job. They were fast and professional. They installed all new doors throughout my house, raised the floor in my family room and office, installed new flooring, and painted both rooms. It looks wonderful. I will be so happy to use the rooms once everything is put back where I want it. We have more work we want done in the future and I will definitely be hiring these guys again.
Serden did a great job on my vacation home in WA. They transformed the property, I had all my floors and windows changed out. Everything looks beautiful, up to date and modern. I will be using them again to remodel my kitchen and bathroom. The whole experience was easy and quick.
We hired Serden and their team to do a complete remodel of our new home that was very outdated. The work they did was incredible! They were very professional, timely, and the attention to detail on the work is amazing. We are so impressed and highly recommend!
Thank you for your quick response. Also, a big Thank You for helping me make my dream house come true, I never expected my home to become so beautiful. Great job. I will recommend you to my friends.
Serden Group and their crews Had done an awesome job remodeling my house. I am very pleased with the outcome. They were very professional and on time. I would definitely use their service again and recommend them to families and friends.
The remodeling team from Serden Group did a very good and professional job at my home. They completely remodeled the kitchen and all the dining and living areas, everything looks like a brand new home! They also installed new patio cover and deck which we already enjoy. Thank you! I definitely recommend them, they are experts, friendly and know what they are doing.
Serden Group remodeled kitchen and all bathrooms in my house. I am very happy with the quality of their work and the way they were informing me on every stage of the project. They also provided design ideas and suggested colors and materials. I needed the full service from design to completion. I am very satisfied.
Cannot be happier with the outcome of our remodel! Professional and communicative contractors. We will go back to Serden for all of our remodeling needs, other contractors do not compare. Yes- we have wasted time and money on others, before finding Serden.
I recently worked with Serden Group on my condo renovation, which included replacing floors, removing popcorn from ceilings, and replacing kitchen counters and cabinets. I loved working with Dennis and David. Dennis helped with input on the kitchen design and was great in helping to reduce stress. They were patient with me and my questions. Their crew was great. And as messy of a job that it was, they managed to leave the place clean when they left for the night. The work was great, and they care for the space as if it;s their own.
This company did a great job on an extensive remodel of a mid 70s home. They upgraded the electrical, plumbing, removed walls, remodeled the bathrooms and kitchen, and put in all new tile flooring. All the home issues were addressed, and we could not be any happier.
Four local facts decide your ADU's scope, budget and schedule before design starts. We work through all of them on the first visit so nothing surfaces after you have signed.
A Vancouver mailing address does not mean a Vancouver permit. Salmon Creek, Felida, Hazel Dell and Orchards permit through Clark County; addresses inside the city go through City of Vancouver Community Development. Different ADU standards, different fee schedules, different inspection queues — and in some unincorporated areas a septic and drainfield question instead of a sewer tap.
Washington's 2023 ADU law requires jurisdictions inside urban growth areas to allow up to two ADUs per residential lot, units of at least 1,000 sq ft, no owner-occupancy requirement, and no off-street parking mandate near major transit. What actually fits is decided by setbacks, lot coverage, height limit and rear-yard access. We check the parcel, not the headline.
A second dwelling needs water, sewer, power and often gas. The questions that move the number: does the existing meter have capacity, can the sewer lateral be shared or does a new tap get cut into the main, and does a 100-amp service need upgrading to carry a second kitchen, laundry and heat pump. We run all three checks in feasibility.
A new dwelling unit triggers one-time system development charges for water, sewer, transportation and parks, assessed separately from the building permit and often totalling five figures. New roof and paving can also push the parcel past a stormwater threshold, adding detention or infiltration. Both go in the written budget as their own lines.
ADU standards, permit requirements, system development charges and stormwater thresholds change. Verify current requirements with the City of Vancouver or Clark County for your parcel — we handle feasibility, submittal and inspections either way, and we will tell you which agency has jurisdiction before you commit to a scope.
From Salmon Creek and Felida to Cascade Park, Hazel Dell and Fisher’s Landing — Serden Group has built additions throughout Vancouver and Clark County. We know which addresses fall under the city and which under the county, what the Permit Center wants to see on a site plan, and how long review actually takes.
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Ranges below include design, structural engineering, permits, site work, utilities, construction and finishes for finished Vancouver units. System development charges and Washington sales tax — which applies to labor as well as materials — are quoted as separate lines.
A long utility run to the back of the lot, a sewer lateral that has to be replaced or a new tap cut in, an electrical service upgrade, sloped or rock-heavy sites, stormwater detention triggered by the added impervious area, and system development charges that vary by jurisdiction.
Using space you already own and already have a roof over — a garage or basement conversion avoids the foundation, the roof and most of the site work. Keeping the unit under the size threshold that triggers additional review, and stacking the ADU near the existing utility stub-outs.
Impact and system development fees, a separate water meter, the driveway or path the code requires to the entry, landscaping restoration after the trench work, and appliances. We list all of it in the written scope so the finance conversation happens once.
Keep Exploring
The services that pair most often with an ADU, plus the planning guides our Clark County clients read first.
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