A free site visit, a check of what your lot allows and a written, line-item price.
Get your free estimateADU Company in Alamo Heights, TX
Adding an accessory dwelling unit in Alamo Heights means working with large, tree-shaded lots, homes built between the 1920s and 1950s, and a city that takes its architectural character seriously. The work here is rarely a simple drop-in project: protected trees, stucco matching, and drainage near Olmos Creek all shape what gets built and what it costs. Seedling ADU San Antonio brings written pricing before any work starts and a crew that treats your lot like it’s their own. Call (210) 981-6358 to talk through your Alamo Heights project.
Why Alamo Heights Homes Are Different
Alamo Heights isn’t a suburb of identical houses on identical lots. The housing stock runs heavily toward Spanish Colonial, Mediterranean, and English cottage styles from the 1920s through the 1950s, many of them set back from the street behind mature oaks. That creates real constraints for ADU work. A detached unit has to sit somewhere on the lot without disturbing a heritage oak’s root zone, and the city’s tree ordinance can add months to approval if a protected tree stands within ten feet of the proposed footprint. You don’t run into that in newer subdivisions.
The climate matters just as much. Alamo Heights summers are hot and humid, and a standalone ADU without proper insulation and correctly sized HVAC will overheat by mid-afternoon. We plan for that from the start, sizing systems for the actual orientation of the structure on your lot, not a generic formula. And for the lower-lying areas near Olmos Creek, drainage and flood-proofing have to be part of the conversation from day one, because a heavy downpour will expose any corner that was cut.
Our Main Alamo Heights Services
Most Alamo Heights homeowners come to us for one of three projects: a home addition that grows the main house, a garage conversion that turns underused square footage into living space, or a fully detached ADU built as a new home on the lot. Each has its own page below with local detail and pricing.
Home Addition Contractor in Alamo Heights
A home addition in Alamo Heights usually means matching stucco texture, rooflines, and window trim to a house that’s been standing for seventy to a hundred years. The goal is an addition that looks like it was always there, not a box bolted onto the side. Alamo Heights permits require careful attention to setback lines and architectural compatibility, and we handle that paperwork as part of the job. Here’s the full breakdown: Home Addition Contractor in Alamo Heights.
Garage Conversion Contractor in Alamo Heights
Converting a garage in Alamo Heights often means working inside a structure that was never insulated, never conditioned, and never intended for living. The slab may need leveling, the walls need insulation, and the electrical panel may need an upgrade before the space is safe for daily use. Detached garages on these older lots also sit close to trees, so drainage around the foundation gets attention early in the plan. See Garage Conversion Contractor in Alamo Heights for scope and cost detail.
ADU Builders in Alamo Heights
A detached ADU in Alamo Heights is a small house, not an oversized shed. The city expects it to complement the main residence, which often means stucco, tile roofing, and detailing that echo the original home. Protected trees can dictate where the structure sits, and that affects everything from foundation type to window placement. We walk you through those constraints before any money is spent. Read more here: ADU Builders in Alamo Heights.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Brands We Service in Alamo Heights
Alamo Heights homeowners often research prefab and panelized ADU options before calling any builder. We work hands-on with Tuff Shed, James Hardie, Abodu, and Cover, so you can choose what fits your lot and your budget rather than whatever our team prefers to sell. See our brands for the full line-up.
Pricing for ADU Company in Alamo Heights, TX
| Service | Typical range in Alamo Heights |
|---|---|
| Detached ADU (400 – 750 sq ft) | $165,000 – $285,000 |
| Detached ADU (750 – 1,200 sq ft) | $285,000 – $425,000 |
| Prefab / modular ADU (studio, 1 bed) | $115,000 – $185,000 |
| Prefab / modular ADU (2 bed) | $185,000 – $280,000 |
| Garage conversion (400 – 600 sq ft) | $85,000 – $150,000 |
| Garage conversion (600 – 800 sq ft) | $150,000 – $215,000 |
| Home addition (200 – 400 sq ft) | $95,000 – $165,000 |
| Home addition (400 – 800 sq ft) | $165,000 – $285,000 |
| Foundation work (pier and beam, per project) | $8,000 – $25,000 |
| Plumbing rough-in (new ADU) | $6,500 – $15,000 |
| Electrical rough-in (new ADU) | $7,000 – $18,000 |
| HVAC system for ADU | $9,000 – $22,000 |
Older homes in Alamo Heights push prices upward when we find outdated wiring, original plumbing that can’t handle a second dwelling, or foundation issues hiding under a 1930s slab. Protected trees can also add cost by shifting the footprint and requiring pier-and-beam work instead of a simple slab. Whatever the number ends up being, you’ll see it in writing before a single tool is picked up, and no surprise line items will appear after crews arrive.
Neighborhoods We Serve in Alamo Heights
Seedling ADU San Antonio works throughout Alamo Heights, from the streets closest to Broadway to the quieter lots along the northern boundary. Our crew moves through the area daily, and scheduling reflects that. Representative neighborhoods include:
- The area around Cambridge Oval and Argyle Avenue
- Lots near the Alamo Heights High School campus and Nacogdoches Road
- Streets between Basse Road and El Prado Drive
- The residential blocks around Patterson Avenue
Service Area – Cities Near Alamo Heights
Most of our work is concentrated in Alamo Heights itself, but we also serve nearby communities, including San Antonio, TX, New Braunfels, TX, Selma, TX, and Boerne, TX. If you’re located in any of these areas, the same written pricing and 365-Day Done Right Promise applies.
Serving Alamo Heights, TX - Our Local Coverage Area
We’re based in the Alamo Heights 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 Company in Alamo Heights
We answer calls live, 24/7, so your first conversation happens the moment you call (210) 981-6358. A site visit in Alamo Heights is usually scheduled within a few days of that first conversation, and you’ll have a written price before any work begins.
Yes. We prepare and submit the plans Alamo Heights requires, and we coordinate with any applicable HOA design review process. The city’s tree ordinance and architectural review are part of the job scope, not an afterthought. Call (210) 981-6358 to talk through what your lot will need.
Every job follows the Cedarwell Care Promise: shoe covers and drop cloths inside your home, pet-safe products where there’s a choice, and a photo of the clean-up before the crew leaves each day. You’ll know what was left behind, and it will be clean. For specifics on your Alamo Heights project, call (210) 981-6358.
What happens when you call
- 1A real person answersNo phone trees - talk to a local adu pro.
- 2You get an upfront price rangeHonest numbers before anyone is dispatched. No surprises.
- 3We come out and measureLicensed & insured, at a time that suits you - the visit and the quote are both free.
- 4You get the price in writingLine-itemed, yours to keep, and nothing starts until you say go.
What Alamo Heights Customers Say
"Garage to studio conversion with us living right there. They sealed off the dust, cleaned up daily, and respected our quiet hours. No surprise costs. Beautiful."
- Terrence Boylan"Added a backyard cottage. The team protected our existing landscaping and left the yard clean every evening. Gentle, respectful, and they walked us through each stage calmly."
- Tamara Welsh"Junior ADU conversion inside the house. They were incredibly clean about it, plastic walls, floor protection, daily cleanup, all with a toddler in the home. Couldn't have asked for more care."
- Marcus Oyelaran
