Short answer: if all you need is an accurate picture of the space as it exists today, hire a measurement or laser-scan vendor — they are faster and cheaper at that job than an engineer is. If anything is going to change — a demising wall, a new suite, a panel, a rooftop unit, a restroom, an occupancy classification — you need a Texas-licensed professional engineer, because a measurement vendor cannot seal the drawings a city will review. Most landlords who ask this question turn out to need both, in that order, and the expensive mistake is buying the wrong one first.
We get asked this several times a month by owners and asset managers of multi-tenant flex, office, warehouse and retail buildings in Texas. It is a fair question, and the search results are genuinely confusing: type “as-built drawings” into anything and you get a wall of measurement, CAD and LiDAR firms. They are not wrong to be there. They are just answering a narrower question than the one most landlords are actually asking.
What a measurement / as-built vendor actually does
An as-built measurement vendor documents what physically exists. Typically that means a field visit with a laser distance meter or a terrestrial LiDAR scanner, then a drafted deliverable in CAD or Revit: floor plan, dimensions, wall locations, door and window openings, column grid, ceiling heights, and often visible MEP elements such as diffusers, panels, fixtures and roof units.
They are good at this, and they should be your first call when:
- You bought a building and inherited no drawings at all.
- You need a leasable-area calculation or a lease exhibit for a broker package.
- You need a base file that a future architect or engineer can build on.
- Nothing is being altered — you are documenting, not changing.
What they do not do — and generally do not claim to do — is engineer anything. A scan tells you a 200-amp panel exists. It does not tell you whether that panel carries three tenants instead of one, and it cannot be sealed and submitted for a permit.
What an MEP engineer does that a measurement vendor cannot
An MEP engineer’s deliverable is a design decision backed by calculation and carried by a professional seal. On an existing multi-tenant building, that usually means answering four questions a scan cannot answer:
- Does the electrical service carry the split? Existing service size, spare capacity, demand calculation under the adopted NEC, and whether each new suite can get its own metered service or has to be house-metered.
- Do the rooftop units zone to the new suites? Existing tonnage against the new floor areas and occupant loads, whether ductwork can be re-zoned or new units are required, and where the curbs and structural support actually are.
- Do the plumbing and gas divide cleanly? Fixture counts per the plumbing code for the new occupant load, restroom accessibility, whether the sanitary and domestic mains can be tapped for a second and third suite, and gas metering if applicable.
- Does the occupancy classification change? A change of occupancy pulls in egress, ventilation, energy code and sometimes fire protection — and it is the item most often discovered late, at plan review.
In Texas, engineering work of this kind must be performed by or under the supervision of a licensed professional engineer under the Texas Engineering Practice Act (Texas Occupations Code Chapter 1001), and engineering firms must hold a registration with the Texas Board of Professional Engineers and Land Surveyors. That is the line. It is not a marketing distinction — it is a licensure one.
The honest comparison
| Question | Measurement / as-built vendor | MEP engineer |
|---|---|---|
| Documents existing conditions accurately | Yes — this is their core competency, often to a tighter tolerance than an engineer will field-measure to | Yes, but usually only to the level of detail the design requires |
| Delivers CAD / Revit base file | Yes | Sometimes; often works from the vendor’s file |
| Point cloud / LiDAR scanning | Yes | Rarely in-house |
| BOMA 2019 area calculation | Often yes | Sometimes; not the usual scope |
| Load, demand and fixture-count calculations | No | Yes |
| Drawings a city will accept for permit | No | Yes — sealed by a Texas P.E. |
| Answers “can this building be split into three suites?” | No | Yes |
| Responds to plan-review comments | No | Yes |
| Typical cost posture | Lower — priced by area scanned | Higher — priced by scope and system complexity |
Read that table honestly and the answer for a documentation-only job is: do not hire an engineer. You will pay engineering rates for drafting. Call a scanning firm.
The sequence that actually saves money
The pattern we see work is not “pick one.” It is a sequence:
- Document once, properly. Get a good as-built base file of the building — whether from a measurement vendor or from an engineer who field-verifies. Reuse it for every future tenant.
- Test feasibility before you sign anything. Before you commit a suite configuration to a broker package or an LOI, have an engineer answer the four questions above. This is a small scope and it is the cheapest hour you will spend on the building.
- Design and seal only what the permit needs. Once the split is proven feasible, the sealed set follows the tenant’s actual scope, not a speculative one.
The costly version is the reverse: a scan is commissioned, a three-suite layout is drawn on top of it, the suites are marketed, an LOI is signed — and only then does someone discover the 400-amp service will not carry three tenants, or the two rooftop units cannot zone to three spaces. At that point the fix is a utility coordination job with a lead time measured in months, not a drawing revision.
Where BOMA 2019 fits
BOMA 2019 is a measurement standard — it governs how rentable and usable area are calculated so that a lease exhibit means the same thing to both parties. It is not an engineering standard and it says nothing about whether systems can be divided. A vendor delivering BOMA-compliant areas has done exactly what BOMA asks. If your lease requires BOMA 2019 areas and your suite is being re-demised, those are two separate deliverables from two different disciplines, and it is reasonable to buy them separately.
How to decide in sixty seconds
Ask one question: is anything changing?
- Nothing changes — you are documenting, leasing as-is, or building a facilities record. Measurement vendor. Done.
- Walls move, suites split, or a tenant changes use — engineer, and get them involved before the layout is fixed rather than after.
- You genuinely do not know yet — a short feasibility review from an engineer will tell you which of the two you need, and it is far cheaper than either mistake.
Where Pyra IXI fits — and where we do not
We are an MEP engineering firm. We are the right call when a building is being divided, re-occupied, permitted, or when a city has issued MEP comments that need to be cleared. We field-verify existing conditions and produce as-built documentation as part of that work, and we can work from a scanning vendor’s file when one exists.
We are not the right call if you need a large building point-cloud scanned for facilities records with no design intent behind it. A dedicated scanning firm will do that faster and for less money, and we will tell you so on the phone.
Related reading: as-built drawings in Texas (BOMA 2019), can a vacant suite split into three?, the landlord’s re-demising checklist, MEP permit comment resolution, and what MEP engineering actually costs in Texas.
Frequently asked questions
Do I need an engineer or a measurement vendor for as-built drawings?
If nothing about the space is changing, a measurement vendor is the right and cheaper choice. If walls are moving, a suite is being split, systems are being divided, or the occupancy is changing, you need a Texas-licensed professional engineer, because only sealed engineering drawings can be submitted for a commercial permit.
Can a laser scanning company produce permit drawings?
No. A scanning or measurement firm documents existing conditions. Drawings submitted for a commercial building permit in Texas must be sealed by a licensed professional engineer or architect, which requires design responsibility a measurement vendor does not carry.
What is the difference between an as-built drawing and a record drawing?
In common use they overlap, but an as-built typically documents what was actually constructed, often marked up by the contractor during the work, while a record drawing is the designer’s cleaned-up final set reflecting those changes. For an existing building with no drawings at all, what you are really buying is a measured survey turned into a drawing.
Do as-built drawings need a P.E. stamp?
Pure documentation of existing conditions generally does not require a seal. The moment those drawings are used to support a design change — a demising plan, a service upsize, a new HVAC zone — the design portion requires a Texas P.E. seal.
What is a BOMA 2019 as-built and when do I need one?
BOMA 2019 is a standard for calculating rentable and usable area. You need it when a lease, a broker package or an ownership transaction requires a defensible area figure. It is a measurement deliverable, separate from any engineering work on the building.
How long does as-built documentation take for a multi-tenant building?
For a typical single-building multi-tenant flex, office or retail property, field verification plus drafted deliverables commonly runs one to two weeks, depending on building size, access to occupied suites, and whether concealed systems need to be opened up or traced.
Who pays for as-built drawings, the landlord or the tenant?
It depends entirely on the lease. Base-building documentation is normally the landlord’s, while drawings for a tenant’s own improvements normally sit with the tenant. Check the work letter before assuming — this is one of the most commonly disputed line items in a fit-out.
Can you work from as-builts a scanning vendor already produced?
Yes, and it is usually the efficient path. We field-verify the items that carry engineering risk — electrical service and panel capacity, HVAC equipment and zoning, plumbing mains and fixture counts — and build the design on the vendor’s base file rather than re-measuring the whole building.
Talk to a Texas MEP engineer
Pyra IXI is an MBE and HUB certified MEP engineering firm registered with the Texas Board of Professional Engineers and Land Surveyors, firm registration F-22556, serving commercial property owners across Texas.
Quang Do, P.E. · Pyra IXI · 12001 Central Drive, Cypress, TX 77433 · (713) 826-3979 · www.pyra-engineering.com
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