To get blueprints of your house online, start at your city or county building department’s website and search its permit portal by street address or parcel number. Some jurisdictions let you download the scanned construction plans directly. Many only show that a permit exists and require a follow-up records request to get the actual drawings. A few, especially smaller towns and older homes, have nothing digitized at all.
Which Office Holds Your Plans
When a house is built or significantly renovated, the owner or contractor files construction plans with the local building department as part of the permit process. Those plans become part of the public record. The office goes by different names depending on where you live: building department, planning department, development services, or community development. The office that issues building permits is almost always the one that keeps the drawings.
How far back the records reach, and whether they’ve been scanned, depends on your local government’s resources. Larger cities have often digitized older files into searchable databases. Smaller towns may still store everything on paper or microfilm, so an online search will confirm that a permit exists but won’t produce a downloadable file. Homes built before your jurisdiction required permits (often pre-1950s, though this varies) may have no government-held plans at all.
What to Gather Before You Search
A few details make the difference between a productive search and a dead end.
- The full street address is the minimum.
- The parcel identification number, sometimes called the APN or PIN, is assigned by the county assessor. It’s usually printed on your property tax bill or searchable on the assessor’s website. Many building department databases let you search by parcel number, which avoids the matching problems that come with unit numbers, suites, or streets that have been renamed.
- Permit numbers from the original construction or a past renovation pull up the associated plans directly. Previous owners sometimes leave permit paperwork in the house, and your title company may have copies in the closing file.
- The approximate year the house was built. Older records are sometimes kept in separate archive systems, and a clerk can point you to the right database with a rough construction date.
Searching the Building Department Portal
Start at the official website of your city or county government and find the building or planning department page. Most jurisdictions with digital records host a portal labeled something like “Permit Search,” “Property Records,” or “Online Services.” Enter your address or parcel number, and the system returns a list of permits associated with the property, often including the original construction permit.
What comes next varies. In the best case, the portal lets you view and download scanned copies of the plans on the spot. More commonly, you see permit details (date issued, type of work, contractor name) but not the drawings themselves. The portal may include a link to request the plans or instructions to schedule an appointment at a records office. Some portals require you to create a free account before you can open documents.
If your city or county doesn’t appear to have an online portal, try a search engine query like “[your city or county name] building permit records.” Smaller jurisdictions sometimes host their records through third-party platforms, and the link isn’t always obvious from the main government website.
Filing a Public Records Request
When plans aren’t downloadable through a portal, a formal public records request is the next step. Building plans filed with a government agency are generally public records, and you have a right to inspect them. Every state has its own public records law, sometimes called a Freedom of Information law or open records law, and local governments must follow it.
The process is usually straightforward. Contact the building department by phone, email, or online form and ask for copies of the construction plans associated with your property address. Include the identifying information you gathered. The agency may charge a fee to search for and reproduce the records. Fees are typically modest for standard requests, but large-format architectural drawings can cost more to reproduce than regular documents, so ask about pricing before the agency starts processing your request.
Response times vary. Some offices turn requests around in days. Others take weeks, especially when records live off-site on microfilm or in an archive facility. If you’re told the plans can’t be copied, most jurisdictions still let you inspect them at the office and take notes or photographs for personal reference.
Copyright Still Applies After You Own the House
This trips up most homeowners. The architect who designed your house almost certainly owns the copyright to the plans, even after the house is built and you own the property. Federal law classifies architectural works as copyrightable, and the definition covers the design as expressed in plans, drawings, or the building itself.1Office of the Law Revision Counsel. United States Code Title 17 Section 101 The architect holds the exclusive right to reproduce, distribute, and create derivative works from those drawings.2Office of the Law Revision Counsel. United States Code Title 17 Section 102 – Subject Matter of Copyright In General
Owning the house gives you real rights over the physical structure. You can alter or even demolish the building without the architect’s permission.3Office of the Law Revision Counsel. United States Code Title 17 Section 120 – Scope of Exclusive Rights in Architectural Works Owning the house doesn’t automatically give you the right to copy the plans, hand them to a new contractor, or use them to build a second house. If you paid the architect to create the plans, you likely received a limited license to build one structure from them, not unlimited reproduction rights.
This matters most when you’re planning a major renovation and want to give the original blueprints to a new architect or contractor. If the original architect is still practicing, the cleanest path is to contact them and request permission or buy a new license. If the architect has retired or the firm has closed, the copyright still exists but enforcement becomes far less likely. Plans obtained through a public records request are viewable as public documents, but reproducing copyrighted drawings for commercial purposes could expose you to an infringement claim.
What You Find May Not Match the House
The plans filed with the building department show what was supposed to be built, not necessarily what was actually built. Changes happen constantly during construction. A wall shifts six inches, a window gets relocated, plumbing reroutes around an unexpected obstacle. The filed blueprints may not reflect any of that.
As-built drawings are revised plans that document the structure as it was actually constructed, including modifications made during the building process. Some jurisdictions require as-builts before issuing a certificate of occupancy. Many do not. If your house has been renovated since original construction, the filed blueprints may be further from reality still.
For renovation planning, as-builts are far more useful because they show where walls, pipes, and wiring actually are. If the plans you find online don’t match your current layout, that’s likely why. You may need a professional to survey existing conditions and produce accurate current drawings.
When Nothing Is Online
Not every house has retrievable blueprints, especially older homes. When the building department comes up empty, a few other routes are worth trying.
Contact the Original Architect or Builder
Architectural firms often retain project files for decades. If you can identify the original architect or builder from permit records, closing documents, or neighborhood history, reaching out directly may get you a copy. The architect still owns the copyright, but most are willing to provide copies to the current homeowner for a reasonable fee.
Ask Previous Owners and Check Title Records
Previous owners sometimes kept copies of the blueprints. If you’re still in touch with the seller, ask. Your title company’s closing file may also contain survey documents or site plans that, while not full blueprints, show the property footprint and setbacks.
Sanborn Fire Insurance Maps for Older Homes
For homes built before the mid-twentieth century, Sanborn fire insurance maps can reveal surprisingly detailed structural information. They were created to help insurance companies assess fire risk, and they show building footprints, the number of stories, construction materials, and the location of doors and windows.4Library of Congress. A Resource Guide – Sanborn Fire Insurance Co. Maps The Library of Congress maintains a large digital collection that is free to search. These maps aren’t blueprints, but they are often the only surviving record of a home’s original configuration.
Have New Drawings Made
When no existing plans can be found, you can have new ones created. An architect or surveyor can measure your home and produce as-built drawings that document the current layout, structure, and systems. Costs depend on size and complexity but generally start around a few hundred dollars for a basic floor plan and can run into the thousands for a full set of structural, electrical, and plumbing drawings.
A cheaper option for simple floor plans is smartphone-based scanning. Several apps use LiDAR sensors (available on newer iPhones and iPads) or photogrammetry to generate floor plans as you walk through with the camera running. The results aren’t as precise as a professional survey, but for basic renovation planning or real estate purposes, they can be good enough at no cost beyond your time.
Types of Drawings You May Receive
If your search succeeds, you may end up with more than one type of drawing. Knowing what each shows helps you tell whether you have what you need.
- Floor plans are top-down views of each level, showing room dimensions, wall locations, and the placement of doors and windows.
- Elevation drawings show the exterior from each side, including the building’s height, roof pitch, and exterior finishes.
- Structural plans detail the framework, including the foundation, load-bearing walls, beams, and roof framing. These are what a contractor needs most for renovations that move walls or add openings.
- Site plans give a bird’s-eye view showing where the building sits on the lot, along with property boundaries, setbacks, driveways, and utility connections. They’re often the easiest records to find because they’re required for almost every permit.
- Mechanical drawings are schematics for plumbing, electrical, and HVAC systems. In many jurisdictions they’re filed separately from architectural plans and may require a separate records request.
Not every permit file contains all of these. Older homes may only have a basic floor plan and site plan on record. Homes built under more recent building codes are more likely to have a complete set, since modern permit requirements are considerably more detailed than those from a few decades ago.