A free site visit, a check of what your lot allows and a written, line-item price.
Get your free estimateWill an ADU Add Value to My Home?
Yes, a well-built ADU adds measurable value to most homes. An accessory dwelling unit creates rentable square footage, a multigenerational living option, or both – and buyers in most markets pay a premium for a property that already has one. The exact value gain depends on your lot size, local zoning, the quality of the build, and whether the unit has a private entrance and its own utilities.
That said, a poorly planned ADU can actually work against you. If the unit was built without permits, doesn’t meet setback requirements (the minimum distance the structure must sit from your property line), or used low-grade materials that don’t hold up to weather or tenant use, appraisers and buyers will discount it. The difference between an ADU that adds value and one that creates a headache at resale almost always comes down to how it was planned and built from the start. That’s the honest answer, and it’s worth spending a few minutes understanding before you break ground.
What’s Happening
When homeowners ask whether an ADU will add value, they’re usually sitting at one of three decision points: they’re considering building one and want to know if it’s worth the investment, they already have one and aren’t sure it was done right, or they’re looking at a property with an existing ADU and want to know whether it helps or hurts the purchase. Each of those is a different conversation, but they all start with the same foundation: how the ADU was permitted, designed, and constructed.
An ADU that was pulled through proper permits, built to current code, finished with durable materials like James Hardie cladding, and delivered with documentation tends to appraise well and attracts serious buyers. One that was thrown up without permits or built to a lower standard tends to create title issues, inspection failures, and friction at closing. Before you make any decision about an existing or planned unit, it helps to know which category you’re working with.
Why It Happens
The ADU Was Built Without Permits
Unpermitted ADUs are the most common value-killer we see. If the unit doesn’t appear in your local assessor’s records, or if you can’t locate a final inspection sign-off, there’s a good chance permits were never pulled. Buyers’ lenders often won’t finance a property with an unpermitted structure, and sellers frequently end up having to remove or remediate the unit before close. You can usually check permit status through your local building department’s online portal.
The Build Quality Doesn’t Hold Up to Scrutiny
An ADU built with budget materials or by a crew that cut corners on framing, weatherproofing, or mechanical systems will look fine to the eye but fail inspection. Signs include soft spots in the subfloor, visible gaps at window and door frames, siding that’s peeling or buckling after only a few years, or HVAC and electrical that don’t meet current residential code. A professional walkthrough will surface these quickly.
The Unit Doesn’t Function as a Legal Rental
In most jurisdictions, an ADU has to meet minimum habitable space requirements, have a separate entrance, and be properly ventilated and insulated before it can be rented legally. If the unit was originally built as a storage conversion or informal guest suite, it may not qualify as a true ADU under your local code – which means buyers and appraisers will treat it as bonus square footage, not an income-producing asset. The distinction matters significantly to value.
Setback and Zoning Violations
Setback requirements vary considerably by jurisdiction. A structure that was built too close to a fence line, an easement, or the main house may technically be in violation even if it passed a casual inspection years ago. These violations tend to surface during title searches and can require costly remediation or, in extreme cases, removal of the structure. If you’re not sure where your structure sits relative to your property lines, a survey is worth the cost before you commit to anything.
What to Do Right Now
- Pull your permit history. Contact your local building department or check their online portal for any permits associated with your address. You’re looking for both the original building permit and a final inspection approval for the ADU specifically.
- Photograph everything you can see. Walk the exterior and interior of the unit and photograph the siding, roof edges, windows, door frames, and any visible mechanical equipment (HVAC, water heater, electrical panel). These images will help a builder or inspector diagnose issues fast.
- Do not attempt any work on the electrical panel or gas connections yourself. If you suspect the unit has wiring or gas line problems, treat those areas as off-limits until a licensed professional assesses them. These are genuinely dangerous and are not DIY territory.
- Find your original purchase documents. If you bought the property with the ADU already on it, look for any disclosure statements, inspection reports, or title notes that reference the unit. These often contain clues about permit status or known issues.
- Write down your goals. Are you planning to rent the unit, house a family member, or sell the property? Knowing your intended use helps the builder recommend the right approach – a long-term rental unit is finished differently than one intended for multigenerational family living.
How We Fix It
When your local Benson ADU Builders team arrives, the first step is a thorough site assessment – lot dimensions, existing structures, utility connections, and a review of any permit documentation you’ve located. From there, Troy Eastman and the team map out what the project actually requires: new construction, a prefab unit from one of the brands we work with (Abodu, Cover, Dvele, Mighty Buildings, Boxabl, Plant Prefab, or Tuff Shed), or remediation of an existing structure.
Before anything moves forward, you receive a written price. That’s not a rough number or a ballpark – it’s a line-item written estimate that covers the full scope, and it doesn’t change once work starts. The actual build timeline depends on the unit type and site conditions, but your team will give you a realistic schedule upfront, not a vague range that shifts later. Every project is covered by the 365-Day Done Right Promise: if the work isn’t right within a full year, we make it right. The relevant services here are our ADU Builder and Home Addition Contractor offerings.
Frequently Asked Questions
The value added depends on the unit’s size, quality, permit status, and whether it functions as a legal rental – there’s no universal percentage we could honestly quote without knowing your specific property. A properly permitted, well-built ADU with a private entrance and independent utilities tends to perform best at appraisal and resale. The only honest answer for your property is a written estimate based on your actual lot and local conditions, which your Benson ADU Builders team can walk you through.
Yes, in most cases it does – sometimes significantly. Unpermitted structures can trigger lender rejections, complicate title insurance, and create liability if a tenant is injured in a space that never passed inspection. The good news is that many jurisdictions now have permit amnesty programs or ADU legalization pathways that can bring an unpermitted unit into compliance. Your local team can help you understand what the remediation path looks like before you decide how to proceed.
If the ADU is already built and you’re not selling soon, there’s no emergency in the traditional sense – but letting a permit issue or structural deficiency sit unaddressed tends to make it harder and more expensive to fix later, especially if weather damage compounds a construction problem over time. If you’re actively in a sale process or planning to rent the unit, the timeline becomes real quickly. Call (903) 568-7222 to get a clear picture of what you’re working with before anything gets worse.
ADU construction and home additions are planned projects – they involve permits, site prep, and often prefab lead times, so no builder who’s being straight with you will promise they break ground tomorrow. What we can do is move efficiently: get you a written price quickly, walk you through the permit process, and put a real schedule in front of you before work starts. Call (903) 568-7222 and a live person will pick up – no voicemail, no waiting until Monday – and get your assessment scheduled.
Get It Fixed
Your local Benson ADU Builders team is ready to assess your property and put a written price in front of you before anything starts. Call (903) 568-7222 – a live person picks up every call, every day – or book online. The estimate is free, the price is in writing, and the 365-Day Done Right Promise covers the work.
Written by Troy Eastman, Owner & Lead Builder at Benson ADU Builders, part of the Relay Home Co. family since 2006.
What Our Customers Say
"Booked a consult online and met the project manager two days later. Weekly progress updates arrived by text with photos. ADU finished on schedule."
- Hannah W."Clean, quiet crew. They respected the neighbors, kept noise to working hours, and swept the driveway every evening."
- Hope C."Communication was the best part. I always knew what was happening that week without having to ask."
- Dolly N.
