A free site visit, a check of what your lot allows and a written, line-item price.
Get your free estimateFast, Reliable ADU Builders Across Manor
ADU construction in Manor typically costs $180 – $320 per square foot for a detached unit, and most garage conversions run $65,000 – $110,000 before permit fees and septic work. Those numbers move depending on your lot, your plat restrictions, and whether your property sits on city sewer or a Travis County OSSF system. We know the difference because we build here, not just list here. Call (361) 309-9568 and we’ll walk your specific property before we ever hand you a number.
Manor is not Austin with a different zip code. It is fast-growing, patchwork-zoned, and full of 2000s-era production homes on clay soil that expands and contracts like a lung. That changes how we engineer a slab, how we route sewer, and how we stage equipment on a 50-foot lot without tearing up your neighbor’s fence line. Our ADU Builders crew runs Manor jobs out of our Austin office, and we send background-checked, uniformed people in company trucks every time. No subs you’ve never met. No voicemail tree.
Why Fielding ADU Austin Is Manor’s Preferred ADU Builders Company
Reed Calloway runs our operation, and he holds every Manor project to the same standard we’ve used since 2006: the price goes in writing before any work starts, the permit gets pulled by the book, and the finished build carries a 365-day written guarantee. That guarantee is not a handshake. It is a one-page document that says if something fails within a year, we return and correct it at no charge. Manor homeowners who have been burned by a contractor before tend to ask for that page. We hand it over without being asked.
Our reputation in Manor is built on jobs in Presidential Meadows, ShadowGlen, and the older ranch-style streets near downtown where attached additions share walls and need party-wall notices done correctly. We know which subdivisions record plat restrictions against detached units. We know which lots sit on septic and will trigger Travis County OSSF review the moment you add a bathroom. That is not marketing trivia. It is the difference between a quote that holds and a quote that collapses six weeks into the build.
Response time to Manor runs same-week for estimates and as soon as permits clear for crew mobilization. When you call, a live person answers. Always. That is The Garrison Code, and Reed enforces it from the first call to the final walkthrough.
ADU Construction in Manor
ADU construction in Manor means building a fully permitted secondary dwelling unit on a lot that probably was not platted with one in mind. That is the work: site assessment, soil evaluation when septic applies, plat review, permit submittal, foundation, framing or module set, MEP connections, and finish work through final inspection. In Manor, you need this when an aging parent moves onto the property, when you want rental income from a backyard unit, or when your home office has outgrown the spare bedroom. A conventional stick-built detached ADU in Manor runs $220 – $320 per square foot. An attached garage conversion runs $65,000 – $110,000 depending on scope and existing panel capacity.
Attached conversions and garage builds
Many Manor homes built between 2000 and 2015 are slab-on-grade with 200A panels and PEX plumbing, which makes an attached conversion cleaner than an older home’s crawlspace retrofit. The garage shell already has a roof, a slab, and often an interior wall. We reframe, insulate, run electrical and HVAC, and finish it to code.
Detached units on large lots
Manor still has genuinely large residential lots, some over a quarter acre. That gives us room for a true detached build with its own utility trench and its own address. Lot size is not the only variable, and we will get into plat restrictions below because they bite harder than any budget line item.
Detached ADU in Manor
A detached ADU in Manor is a fully independent structure with its own kitchen, bath, entrance, and utility connection, separated from the main house. You pursue this when you want true separation, a rental unit with privacy, or a build that does not touch the footprint of your existing home. In Manor, a detached unit on a lot without sewer triggers OSSF evaluation first. On sewer-connected lots, it still requires a separate water and sewer tap or a properly engineered tie-in. Typical cost for a detached ADU in Manor runs $220 – $320 per square foot, with prefab or modular units from Abodu, Cover, or Tuff Shed-style structures sometimes landing nearer the bottom of that range when site conditions cooperate.
Foundation engineering on Blackland Prairie clay
Manor sits on Blackland Prairie clay. It swells when wet, shrinks when dry, and is hard on slabs. We do not pour a detached ADU foundation here without a soils report and a thickened-edge slab or pier-and-beam design suited to the movement. Ductless mini-splits handle the heat better than ducted systems in a detached unit, and they cost less to run through July and August when it stays near 100 degrees for weeks.
The septic variable
If your Manor property is on septic, the county treats your new ADU as additional wastewater demand. That means an OSSF evaluation, lot-specific soil testing, and potentially a larger drain field or a whole-system upgrade before any framing starts. We price this honestly up front, including the testing, so your number does not move at the door.
Trusted Brands We Service in Manor
We build with the brands Manor homeowners are already researching. For prefab and modular ADUs, we work with Abodu and Cover, and we install Tuff Shed-style structures where a simpler build fits the budget and the plat. For conventional exterior work, we use James Hardie siding almost exclusively because it holds up to Manor’s heat, hail, and humidity cycles without warping or buckling. Because we run so many jobs through Manor, we keep relationships with local suppliers tight, which shortens lead times on Hardie trim, mini-split units, and prefab module delivery when your permit clears.
Common ADU Builders Problems We See in Manor Homes
- Plat restrictions discovered after the quote. In Presidential Meadows and ShadowGlen, several recorded plats prohibit detached ADUs outright. A builder who does not pull the plat before pricing will design a unit the HOA rejects, and you eat the redesign cost. We check plat documents before we quote.
- Septic capacity underestimated. On Manor’s ETJ lots, adding a bathroom to an ADU can push a septic system past its permitted capacity. Travis County then requires OSSF soil testing and often a holding tank or drain field upgrade mid-project. We include this evaluation in our initial site work, not as a surprise change order.
- Equipment damage on narrow lots. A wide-track skid steer on a tight Manor side yard damages fences, tears up grass, and starts code complaints from neighbors before the first inspection. We use narrow-track equipment and stage materials curbside or in the street when the lot demands it.
- Work-hour citations. Manor’s noise ordinance is enforced, and an early concrete pour on a slab-on-grade in ShadowGlen will draw a constable and a Nextdoor thread. We schedule pours and loud work inside legal hours and notify adjacent neighbors before heavy days.
Pricing for ADU Builders in Manor, TX
Here are real numbers for Manor’s market. A detached stick-built ADU runs $220 – $320 per square foot. A garage conversion runs $65,000 – $110,000 total. A prefab or modular unit from Abodu or Cover typically lands between $180,000 and $280,000 all-in, depending on site work, foundation, and utility connections. Septic upgrades add $15,000 – $40,000 if your lot requires OSSF expansion. HOA variance review, when required, adds $500 – $2,500 in filing and document costs. Every number we give you is in writing before any work starts, and the price you approve on day one is the number on the final invoice. Call (361) 309-9568 for a free estimate on your specific lot.
We Also Serve Cities Near Manor
Our crews run ADU jobs throughout the northeast metro. We serve Pflugerville, Hutto, Austin, and Georgetown with the same written-price and written-guarantee standard. If you’re on a lot in one of those cities, the septic and plat rules shift, and we know those codes too. Call (361) 309-9568 and we’ll tell you straight what your property can handle.
Serving Manor, TX - Our Local Coverage Area
We’re based in the Manor area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs About ADU Builders in Manor
No. Many recorded plats in Presidential Meadows and ShadowGlen explicitly prohibit detached ADUs, so you will need a formal HOA variance before any foundation work, and the HOA can deny it. On one Presidential Meadows job, our crew staged materials curbside and discovered the plat prohibition, so we shifted the client to an attached garage conversion with a James Hardie exterior and a ductless mini-split under Manor’s attached-addition rules. The variance process is not a formality, and we handle the documentation for you. Call (361) 309-9568 for a free plat review before you commit to a design.
Sometimes, and the only way to know is lot-specific soil testing through Travis County’s OSSF program. Adding a kitchen and bath to an ADU increases wastewater demand beyond what many existing Manor systems were permitted for. If the soil cannot absorb it, the county requires a larger drain field or a holding tank upgrade, which typically runs $15,000 – $40,000. We order the evaluation at the start so the number is in your written price, not a surprise change order. Call (361) 309-9568 for an exact assessment of your lot.
Manor restricts construction noise to weekday daytime hours, generally 7 a.m. to 7 p.m., with tighter weekend limits depending on the specific ordinance in your area. Early-morning concrete pours have drawn citations in ShadowGlen, and Travis County constables respond to complaints. We schedule loud work inside legal hours and notify adjacent neighbors before heavy days so your build does not become the block’s problem. Call (361) 309-9568 to discuss your site’s specific constraints.
Yes. On tight Manor lots, we use narrow-track skid steers and stage materials curbside or in the street so we do not tear up the front yard or damage a neighbor’s fence line. On a tight Presidential Meadows lot, our crew ran a narrow-track skid steer entirely along the side yard and completed the build without a single fence repair. The access constraint affects the quote, and we price it honestly rather than hoping it does not matter. Call (361) 309-9568 for a site-specific estimate.
A party-wall notice is a formal written notice to the adjacent property owner that you will be performing work on a shared wall, and in Manor it must be delivered before any work that touches the wall begins. For older ranch-style homes near downtown Manor, the shared wall is often the original exterior wall of both homes, and the notice gives the neighbor a documented period to review and raise objections. We prepare and file the notice appropriately before framing starts, protecting both you and the build from work-stop orders. Call (361) 309-9568 and we’ll check whether a party-wall notice applies to your project.
Call Fielding ADU Austin for Your Manor ADU Project
If you are planning an ADU, garage conversion, or room addition on a Manor lot, call us before you sign anything. We will review your plat, check your septic status if applicable, and hand you a written price that covers the real conditions on your property. No vague allowances. No price moved at the door. Reed Calloway and the Fielding ADU Austin team back every Manor build with the 365-Day Done Right Promise, and a live person answers every call at (361) 309-9568.
Written by Reed Calloway, Owner at Fielding ADU Austin, building ADUs to The Garrison Standard since 2006.
