Do You Need to Be Onsite for a 3D Scan?

If you are scheduling measured drawings for a home, condo, retail space, or tenant improvement, one of the first practical questions is simple: do I need to be onsite for a 3D scan? In most cases, the answer is no. You do not usually need to stand with the field crew during the entire appointment as long as the scanner team can get into the property and reach every area that needs to be documented.

That said, access matters just as much as attendance. A smooth scan appointment depends on who can unlock the site, whether all rooms and exterior areas are reachable, and whether there are any building rules, tenants, pets, alarms, or gated entries that could slow the work down. For California projects, especially in occupied homes, multifamily properties, and commercial spaces, access planning is often the difference between a fast visit and a delayed one.

The short answer: you usually do not need to be there

For most residential and commercial as-built projects, FastAsBuilt can complete the onsite scan without you physically present. What the crew needs is reliable scan access, not necessarily the owner standing nearby. If a trusted person can open the property and make sure the right spaces are available, the field work can usually move forward normally.

This is common when:

• You are out of town but have a local property manager, tenant, contractor, or family member who can open up.
• You recently bought a house and need existing conditions documented before design starts.
• Your architect, designer, or contractor is coordinating the project and handling site logistics.
• The property is vacant and entry can be arranged securely.

The main issue is not whether you attend. It is whether the crew can measure the full scope without interruption. If the appointment is for a whole house but one bedroom is locked, the garage is inaccessible, or the side yard gate cannot be opened, the resulting drawings may be incomplete and a return trip may be necessary.

If you are still deciding what kind of deliverable you need, it helps to understand what as-built drawings are and how they are used for design, renovation, and permitting.

When it helps to be onsite

Even though you are not usually required to attend, there are situations where being there is useful. If the property has unusual conditions, multiple locked areas, or decisions that may come up during the visit, your presence can make the scan appointment more efficient.

Being onsite can help when:

• There are several structures, additions, patios, or detached spaces and you need to confirm what is included.
• You want to walk the crew through priority areas, such as a future ADU, garage conversion, or tenant improvement area.
• The property has pets, alarm systems, access codes, or HOA rules that may need quick clarification.
• You are not sure whether attics, crawlspaces, roofs, basements, or utility rooms are part of the scope.
• You expect questions about recent changes that are not obvious from the existing layout.

For example, if a Southern California hillside property has multiple levels, retaining walls, and exterior stairs, it can be helpful to meet briefly at the start of the onsite scan so everyone is aligned on what should be documented. The same goes for Bay Area homes with lower-level storage, converted garages, or additions that were built at different times.

You also may want to be present if this is your first time ordering measured plans and you want to understand the process better. A good overview of the workflow is in how as-built drawings are made.

What matters more than attendance: complete scan access

If you remember only one thing, make it this: full scan access is essential. A 3D scan or laser measurement appointment captures existing conditions as they exist on the day of the visit. If parts of the property are blocked, occupied in a way that prevents entry, or simply unavailable, those conditions affect the final documentation.

Before the appointment, think through every place the crew may need to reach:

• Front gate, lobby, lockbox, or parking access
• Main house, condo unit, office suite, or retail space
• Garage, basement, storage rooms, utility rooms, and laundry areas
• Rear yard, side yard, patio, balcony, and exterior stairs
• Detached structures such as sheds, studios, or accessory spaces
• Common areas if they affect your scope

It also helps to mention anything that could limit movement through the site. Examples include aggressive pets, sensitive tenants, security patrols, elevator reservations, low-clearance attic openings, or construction already underway. None of these issues automatically stop the job, but they should be communicated in advance.

Who can let the crew in if you cannot attend?

If you cannot be there, another responsible adult can usually handle access. For many California projects, this is the most practical setup. The person providing access does not need technical drafting knowledge. They just need to know which areas are included and be able to open them.

Common access contacts include:

• A spouse, partner, family member, or roommate
• A tenant with permission to allow entry
• A property manager or leasing contact
• Your architect, interior designer, or contractor
• A realtor or transaction coordinator for a recently purchased property

Whoever meets the crew should understand the site well enough to answer basic questions such as:

• Which rooms, units, or buildings are included?
• Are there any locked areas that must be opened?
• Are exterior spaces part of the scope?
• Is there an alarm, parking instruction, or building sign-in procedure?
• Are there any areas the crew should avoid?

If the space is in a managed building, it is smart to confirm policies ahead of time. Some HOAs, condo associations, and commercial properties require advance notice, certificates, designated parking, or elevator scheduling. That kind of coordination matters far more than whether you personally stay for the whole scan appointment.

How to prepare for a smooth scan appointment

The best scan appointments are the ones that feel uneventful. That usually means the site is accessible, reasonably safe to move through, and not full of preventable surprises. You do not need to stage the property perfectly, but basic preparation helps the field crew work faster and more completely.

Simple prep steps

• Unlock all rooms, gates, garages, and detached structures in the scope.
• Secure pets so the crew can move room to room without interruption.
• Disarm alarms or provide instructions for entry and exit.
• Tell occupants when the crew is arriving.
• Move items that block doors, attic hatches, or access panels if those areas are included.
• Share parking instructions, gate codes, and call box details in advance.

Normal furniture is usually fine. The crew is documenting the building, not trying to create an empty showroom. Still, large piles of stored items, locked closets, or packed garages can make it harder to capture wall locations, openings, and circulation paths. If a room is heavily obstructed, mention it before the visit so expectations are clear.

If you need plans for a permit set, it is especially important that all relevant areas be reachable on the first trip. You can read more about as-built drawings for building permit work and why complete existing conditions matter early in design.

What if the property is occupied, tenant-occupied, or under construction?

Occupied properties are routine, but they do require coordination. If you live in the home, the easiest approach is often to either be there at the start or arrange for someone else to open and stay reachable by phone. If a tenant occupies the space, make sure they know the date, time window, and what spaces will need to be entered.

For tenant-occupied homes, apartments, and commercial suites, the key issue is consent and scheduling. FastAsBuilt can measure the site, but access still depends on the occupant allowing entry to every required area. If only part of the property is available, the drawings may reflect only that accessible portion unless a follow-up visit is arranged.

Construction in progress can also affect the onsite scan. Demolition debris, temporary partitions, stacked materials, and active trades may limit visibility or physical access. In some cases, it makes sense to scan before work begins so the drawings reflect true pre-construction conditions. In other cases, a later appointment may be better if the goal is to capture current framing or newly built work.

For homeowners who just closed on a property and are trying to move quickly, this related guide on as-built drawings for a house you just bought can help clarify the next steps.

Do you need to stay for the entire visit?

Usually, no. Even when you choose to attend, you often do not need to follow the crew from room to room for the full appointment. In many cases, it is enough to be there at the beginning to provide access, answer scope questions, and point out any special areas. After that, you may be able to leave if another approved person can lock up or if a clear closing plan has been arranged.

Whether you should stay depends on the property and the access plan. It makes sense to remain available if:

• The site has multiple structures or unusual boundaries.
• There are areas that may or may not be included.
• Only you have the keys, codes, or alarm details.
• You need to relock the property immediately after the visit.

If the property is straightforward and all entry instructions are settled, there is rarely a technical reason for you to supervise the work. FastAsBuilt’s field method relies on onsite laser measurement, followed by drafting by senior drafters into permit-ready CAD files delivered in PDF and DWG formats. If you want to understand the deliverables better, see what is included in as-built drawings.

How attendance affects timeline, pricing, and revisions

Being onsite does not usually change the base service by itself. What affects timeline and cost more often is whether the crew can complete the scope in one visit. Missed rooms, locked structures, or incomplete exterior access can create delays and sometimes require additional coordination.

FastAsBuilt offers 2D As-Built Plans starting at $900 for up to 1,500 square feet, then $0.50 per square foot, with one revision and typical delivery in 48–72 hours. 3D As-Built Plans start at $1,500, then $1.00 per square foot, and include a 3D model plus 2D floor plans, elevations, and sections, with two revisions and typical delivery in 3–5 business days. Custom work such as commercial projects, ADUs, SB9 projects, and tenant improvements is quoted individually.

Turnaround times are estimates and may vary based on project complexity and scheduling.

Those timelines assume the property can be measured successfully. If your project has unusual access requirements, mention them at booking so they can be planned around upfront. You can review service options or start scheduling through our packages page.

Frequently asked questions

Can I give access through a lockbox or smart lock?

Often, yes, as long as entry instructions are reliable and all areas in the scope can be opened. If certain rooms, garages, or exterior gates use different keys or codes, make sure those are accounted for too. The simpler and clearer the access plan, the smoother the appointment tends to be.

What if only part of the property is accessible on the appointment day?

If parts of the site are unavailable, the scan may only capture the accessible areas. That can limit the usefulness of the final drawings, especially for design or permit work. If there is any chance a garage, detached structure, side yard, or tenant space will be closed off, it is better to raise that issue before the visit.

Do I need to clean or empty the property before an onsite scan?

No special cleaning is required, and normal furniture is not a problem. What matters more is access and visibility. Doors should open, circulation paths should be reasonably clear, and included areas should not be blocked by storage, debris, or pets.

Is a 3D scan different from a regular measurement visit when it comes to attendance?

From an access standpoint, not much. Whether the crew is using laser-based field measurement for 2D plans or collecting data for 3D as-builts, the same practical rule applies: you do not usually need to be onsite, but someone must make sure the team can enter and reach every required space.

Bottom line

You usually do not need to be onsite for a 3D scan, but you do need a solid access plan. If the crew can enter the property, move through all required areas, and handle gates, alarms, occupants, and lockup smoothly, your physical presence is often optional. For California as-built drawings, the most important step is making sure the onsite scan can be completed fully the first time.