Site Assessment in Houston, TX

Site Assessment in Houston, TX

A site assessment for an ADU in Houston typically costs $300 – $900 when done as a standalone service, and most assessments take 1 – 2 hours on your property. It tells you whether your lot can legally and practically support an accessory dwelling unit (a second, smaller home on the same property as your main house), a garage conversion, or a home addition before you spend money on design or permits. At Lodgewick ADU Houston we’ve been doing these assessments since 2010, and we put our findings in writing so you know exactly where you stand. Call us at (361) 326-2313 and we’ll walk you through what an assessment covers and whether your project needs one.

This page is part of our ADU Design & Permitting in Houston service. If you’re considering any kind of secondary dwelling on your Houston lot, the site assessment is the step that saves you from expensive surprises later.

When You Need Site Assessment

A site assessment isn’t a formality. It’s the difference between a project that moves forward cleanly and one that stalls at the permit counter or fails in the Houston clay. Here are the situations where homeowners call us for an assessment:

• You’re planning an ADU but aren’t sure your lot qualifies. Houston’s setbacks, easements, and lot-coverage rules vary by neighborhood. In areas like Meyerland and Timbergrove, older plats often have restrictions that newer subdivisions like those in Katy or Cypress don’t carry. An assessment confirms what’s buildable on your specific parcel.
• You’re considering a garage conversion and want to know if the existing slab and framing can carry it. Many Houston garages built before 1990 were poured as floating slabs with no rebar. That matters for a conversion to living space.
• You’ve lived through a project that went wrong somewhere else and need documentation before you commit. We write down what we find. You get the facts on paper, not a handshake and a promise.
• You’re comparing a prefab ADU against a site-built one. Prefab manufacturers like Dvele and Boxabl have specific site requirements: flat pad tolerance, access width for delivery, crane clearance, and soil bearing capacity. An assessment tells you which option actually fits your lot.
• You’re in a floodplain or near a bayou. Houston’s floodplain maps changed after Harvey. Lots in places like Kingwood, Bellaire, or along Brays Bayou may now carry elevation requirements that didn’t exist when the house was built. We check this before you spend a dollar on design.
• You need a realistic budget, not a guess. Site conditions drive cost. Soil, drainage, tree placement, utility locations. A good assessment produces a cost range you can plan around, not a number that changes at the door.

If any of those describe your situation, an assessment is the right first step. It’s also the cheapest part of the process, and it answers the biggest question before it becomes an expensive question.

Our Site Assessment Process

Here’s how a site assessment with Lodgewick ADU Houston works, step by step. Everything gets documented, and you get a written report at the end.

1. We start with the lot itself. Our team walks the property and measures existing structures, setbacks, easements, tree locations, slope, and accessible utility points. We’re looking for what the city will look for when you submit for permits.
2. We pull your parcel data and city records. Houston’s deed restrictions, floodplain overlays, and zoning designations are all public record, but they’re a maze to sort through. We pull what applies to your specific address and cross-check it against what we found on the ground.
3. We test what matters for your project type. If you’re looking at a garage conversion, we check the slab, roof structure, and electrical service. If you’re planning a detached ADU, we evaluate the building site for soil conditions, drainage, and access for equipment or a prefab delivery like a Mighty Buildings or Plant Prefab unit.
4. We identify constraints and costs. This is where the assessment earns its fee. We tell you what’s in the way, what it costs to address, and whether it’s a minor line item or a project-killer. No sugarcoating.
5. We deliver a written report. You get a document you can keep, share with lenders, or hand to a designer. It includes our findings, your options, and a recommended path forward with realistic cost ranges.
6. We answer your questions in person or by phone. After you’ve read the report, we go through it with you. You call (361) 326-2313 and a live person picks up. No voicemail tag, no chatbot.

This process is what we refer to as part of The Kingswell Way: say the price before the work, show up in the window given, document what we find, and leave your property cleaner than we found it. It’s how Russ Delmar has run every assessment since 2010.

Site Assessment Pricing in Houston

Here’s what homeowners in Houston can expect to pay for a site assessment with us. These are real ranges, not teaser numbers designed to get you on the phone.

• Standard ADU site assessment: $300 – $600. Includes full lot walk, parcel research, constraint identification, and a written report with cost ranges. For most single-family lots under 10,000 square feet, this is the ballpark.
• Garage conversion feasibility assessment: $350 – $700. Includes structural evaluation of the existing garage, slab condition check, electrical service review, and conversion cost estimate.
• Prefab ADU site assessment: $500 – $900. Includes everything in the standard assessment plus delivery access evaluation, crane or equipment clearance, pad tolerance review, and manufacturer-specific requirements for brands like Dvele, Mighty Buildings, Boxabl, or Plant Prefab.
• Floodplain or special-hazard assessment: $400 – $800. For lots in mapped floodplains, near bayous, or with elevation certificates on file. Includes floodplain overlay verification and elevation requirement analysis.

What affects the price? Lot size, access difficulty, whether the property has an existing survey we can use, and whether you’re in a special hazard area. A standard rectangular lot in a subdivision like Oak Forest or Spring Branch is straightforward. A pie-shaped lot near White Oak Bayou with mature oaks, a utility easement, and a garage built in 1964 takes more time.

We provide a written price before any work starts. That’s not a courtesy. It’s a rule we’ve kept since day one. You sign off on the assessment fee before we step onto your property, and that number doesn’t change when we hand you the report. If the assessment reveals conditions that require additional study, we tell you first and you approve before we proceed.

Planning an ADU, JADU, or garage conversion? Call (361) 326-2313 for a free phone consultation and we’ll give you an honest read on whether a site assessment is your next step. Estimates are free, and the person answering the phone will be a person.

What the Assessment Covers (and What It Doesn’t)

Here’s what’s in a Lodgewick ADU Houston site assessment report:

• Buildable area map. We mark where an ADU can go on your lot based on setbacks, easements, and existing structures.
• Utility access points. Where water, sewer, electrical, and gas tie-ins would need to happen, and what that typically costs in the Houston market.
• Floodplain status. Whether your lot is in a mapped floodplain, what your base flood elevation is if applicable, and how that affects ADU construction.
• Soil and drainage observations. Houston’s gumbo clay expands and contracts dramatically. We note visible drainage issues and recommend geotechnical testing if warranted.
• Access and construction logistics. Gate widths, overhead clearance, equipment staging areas, and any restrictions that could affect a build or a prefab delivery.
• Cost ranges for your specific conditions. This is the section homeowners care about most. We give you numbers for site prep, foundation, utilities, and what to expect for the ADU itself.

The assessment doesn’t include architectural drawings, structural engineering, soil boring tests, or survey work. Those come later, after you know the project is viable. We’ll tell you when you need them and what they cost.

Houston-Specific Considerations

Houston is not one market. It’s a patchwork of neighborhoods, each with its own constraints, and a site assessment has to account for that. Here’s what we see on the ground:

Clay soil is the biggest variable. Houston sits on expansive clay that moves with moisture. A slab that’s fine for a storage shed may not be sufficient for a living space. In neighborhoods like Garden Oaks and Oak Forest, we regularly see foundation movement in existing garages that rules out a simple conversion. In newer developments in Fort Bend County or Montgomery County, soil conditions vary block by block.

Floodplain status changed after Harvey. Thousands of Houston homeowners discovered their property was in a floodplain they didn’t know existed. Updated FEMA maps now affect ADU permitting in ways builders didn’t have to deal with ten years ago. If your lot carries a base flood elevation requirement, it changes the foundation design, the finished floor height, and the cost. We check this during every assessment.

Deed restrictions override zoning. Houston famously doesn’t have traditional zoning, but many subdivisions have deed restrictions that act like zoning. Those restrictions may cap the number of structures, require specific setbacks, or prohibit secondary dwellings entirely. We pull these records as part of our parcel research.

Utilities can be far from the ADU site. On large lots, running water and sewer lines to a detached ADU can add $8,000 – $20,000 to the project. That’s not a hidden fee. It’s a site condition we identify during assessment so you can plan for it.

We’ve been assessing Houston lots since 2010. Russ Delmar has walked parcels from Pasadena to Katy, and the report you get reflects that accumulated local knowledge, not a template.

Prefab vs. Site-Built: What the Assessment Tells You

A lot of Houston homeowners ask us about prefab ADUs. They’ve heard about brands like Dvele, Mighty Buildings, or Boxabl and want to know if one would work on their lot. The honest answer: sometimes yes, sometimes no, and the site assessment is what tells you which.

Prefab units have tighter site requirements than site-built construction. A Dvele unit, for example, requires a precise foundation tolerance, wide delivery access, and sometimes crane placement. A Boxabl unit ships in a specific folded configuration that requires clear overhead space and a particular approach angle for the delivery trailer. Plant Prefab panels come on trucks that need room to maneuver and stage.

We evaluate all of this during the assessment and give you a straight answer: prefab works here, or it doesn’t. If it works, we tell you which manufacturer’s requirements your lot meets and what the preparation costs will be. If it doesn’t, we tell you why and what a site-built ADU would cost instead. You’re not paying us to sell you a particular product. You’re paying us to tell you the truth about your lot.

Why Homeowners Choose Lodgewick ADU Houston for Assessments

We’re not the only company in Houston that does site assessments. But we’re one of the few that operates under a written guarantee on every engagement, and that changes how the work gets done.

The 365-Day Done Right Promise. If we assess your lot and something in our report proves to be wrong within a year, we come back and make it right. That commitment is in writing before we start. If we told you your setback allowed a 20-foot structure and the city says otherwise, we correct the report and we don’t charge you for the correction. That’s the promise, in plain English.

Written price, always. The assessment fee is agreed before we arrive. The cost ranges in our report are ranges, not commitments, but we base them on actual Houston construction costs, not optimistic guesses. What we quote for the assessment is what you pay. Period.

A live person answers the phone. 24 hours a day, 7 days a week. When you call (361) 326-2313 with a question about your report, a human picks up. Not a voicemail. Not an automated menu. Russ or a member of his team.

Background-checked, uniformed technicians. When we walk your property, you know who we are. Our crew wears Lodgewick uniforms and every person on your lot has passed a background check. You shouldn’t have to wonder who’s in your backyard.

We work with the ADU brands you’ve been researching. We have hands-on familiarity with Dvele, Mighty Buildings, Boxabl, and Plant Prefab, among others. When we assess your lot for a prefab unit, we know what each manufacturer actually needs, not just what their brochure says.

A lodge is a small house on a larger property. That’s what an ADU is, and it’s all we do. We’re not a general contractor doing an ADU on the side. It’s our whole business.

Key Takeaways

• A site assessment in Houston costs $300 – $900 and takes 1 – 2 hours on your property.
• You get a written report covering buildable area, utilities, floodplain status, soil observations, access logistics, and cost ranges.
• Houston’s clay soil, post-Harvey floodplain maps, and deed restrictions make a professional assessment especially valuable here.
• Prefab ADUs from brands like Dvele, Mighty Buildings, Boxabl, and Plant Prefab have specific site requirements that an assessment verifies before you commit.
• Every assessment includes a written price before work starts and is covered by the 365-Day Done Right Promise.

FAQs – Site Assessment

How much does a site assessment cost in Houston?

A site assessment in Houston typically costs $300 – $900 depending on lot size, access, whether it includes a garage structural evaluation, and whether you’re evaluating a prefab ADU. Standard single-family lot assessments fall in the $300 – $600 range. Call (361) 326-2313 and we’ll give you a written price for your specific property before any work begins.

Is a site assessment required before designing an ADU?

A site assessment isn’t a legal requirement, but it’s the smartest first step, because it identifies lot constraints before you pay for design work. In Houston, where deed restrictions, floodplain overlays, and soil conditions vary widely by neighborhood, skipping the assessment can mean paying for plans that can’t be permitted. We recommend it for every ADU, JADU, and garage conversion project.

How long does a site assessment take?

Most site assessments take 1 – 2 hours on the property, with the written report delivered within 3 – 5 business days after the site visit. Prefab-specific assessments for brands like Dvele or Mighty Buildings may take slightly longer because we verify delivery access and foundation tolerance requirements. Call (361) 326-2313 for a specific timeline on your lot.

What happens if the assessment finds problems with my lot?

If the assessment finds issues, like floodplain requirements, poor drainage, or a garage slab unsuitable for conversion, we document them in your report with cost ranges to address them. You’re not obligated to proceed with any further work. The assessment is yours to keep, and if the findings are wrong within a year, we come back and correct them under the 365-Day Done Right Promise.

Can you assess my lot the same week I call?

In most cases, yes. We schedule site assessments within 3 – 7 business days of your call, and we can often accommodate same-week visits in the Houston metro area. A live person answers the phone 24/7 at (361) 326-2313 and can check availability right then.

Get Your Houston Lot Assessed

If you’re thinking about an ADU, a garage conversion, or a home addition on your Houston property, a site assessment is the lowest-cost way to find out what you’re actually working with. You’ll get a written report, real cost ranges, and the confidence of knowing whether your project is viable before you spend real money on design or permits.

Call (361) 326-2313 for a free phone consultation. We’ll talk through your project, give you an honest read on whether an assessment is the right next step, and schedule a visit if it makes sense. The person who answers the phone will be a person, and the price we quote will be the price on your invoice. That’s The Kingswell Way, and it’s been our way since 2010.

Written by Russ Delmar, Owner at Lodgewick ADU Houston, serving Houston.