Of the 54 jurisdictions compared here, 26 write a diameter for the landscape architect seal into their rules, 21 state no size, and 30 accept an electronic or digital seal. Nebraska does not license landscape architects, and the U.S. Virgin Islands prescribes no seal for them. Minnesota makes the seal optional and requires a signed certification block, Nevada's Board supplies the seal, and the District of Columbia and New Jersey rows leave the face unconfirmed. This page compares seal wording, size, devices, electronic use, signing and lapse across all 54 and links each state hub.
Engineer Seal Stamps compliance desk. Checked against the statute or board rule cited in each row. Sources read September 2026.
| Jurisdiction | What the seal must show | Size, devices and electronic seal | Source |
|---|---|---|---|
| Alabama | Name, registration number, STATE OF ALABAMA and REGISTERED LANDSCAPE ARCHITECT. | 2 inch circle. No device named. Electronic seal not addressed. | Ala. Admin. Code r. 500-X-2-.07(3)(a) |
| Alaska | Registered name, number in numerals only, State of Alaska, title and a signing space. | No size. No physical device named. Electronic version allowed. | Alaska Stat. § 08.48.221(a) |
| Arizona | Name, number, title, Arizona U.S.A. and the words date signed. | 1-1/2 inches outside, 1-1/8 inside, within 1/16 inch. Ink seal. No electronic standard. | A.A.C. R4-30-303(A) |
| Arkansas | Registered name, number, REGISTERED LANDSCAPE ARCHITECT, STATE OF ARKANSAS. | 1.5 and 1 inch circles. Metal impression seal, rubber stamp or printed seal. Release legend for electronic files. | ASBALAID Administrative Rules, Section XII.A |
| California | Licensed name, number, two legends, signature line, renewal date and sealing date. | 1 to 2 inch circle. Any device from any source. Electronic seal not addressed. | Cal. Bus. & Prof. Code § 5659 |
| Colorado | Name, license number, licensing date and the Colorado legend. | No size or shape. No device named. Board may allow an electronic stamp by rule. | C.R.S. § 12-130-116(1) |
| Connecticut | Statute fixes only the legend; number not fixed. | No size, shape, device or electronic provision. | Conn. Gen. Stat. § 20-372(b) |
| Delaware | Name, Registered Landscape Architect, and only NO. and State of Delaware inside. | 1-13/16 inch circle. Embosser or rubber stamp. Electronic seal not addressed. | 24 DE Admin. Code 200, s. 5.1.3 |
| District of Columbia | Set in DCMR 17-1911, text unreadable; wording unconfirmed. | Size and device unconfirmed. No separate electronic standard. | DCMR chapter 17-19 section list, dcregs.dc.gov |
| Florida | STATE OF FLORIDA, LANDSCAPE ARCHITECT, registered name, certificate number. | No size. Ink, embossed or computer-generated. Electronic sealing permitted. | Fla. Admin. Code r. 61G10-11.010(1) |
| Georgia | Name, certificate number, Registered Landscape Architect. | No size or shape. Inked rubber stamp or raised seal. No electronic provision. | Ga. Comp. R. & Regs. r. 310-7-.01(1) |
| Guam | Registered name, registration number, professional designation, Board design. | No size. Permanent medium the Board approves; approved electronic image allowed. | 22 GCA § 32116 |
| Hawaii | Hawaii, U.S.A. on the ring; title, license number and licensed name. | 1-1/2 inch outer, 1-1/8 inch inner. Seal or rubber stamp. Electronic seal not stated. | Haw. Admin. R. § 16-115-8(a) |
| Idaho | Name, Licensed Landscape Architect, State of Idaho, board-approved content. | No size. Rubber stamp or electronic seal; no embosser named. | Idaho Code § 54-3003(9)(b) |
| Illinois | Registered name, registration number, the Illinois legend verbatim. | No size or shape. Reproducible seal or facsimile, paper or electronic. | 68 Ill. Adm. Code 1275.ILLUSTRATION A(a) |
| Indiana | Name as on certificate, number with LA optional, milled or double-circle border. | 1 5/8 to 1 7/8 inches. Embossed, rubber stamped, electronic or other permanent method. | 804 IAC 1.1-2-7(d), (e), (f) |
| Iowa | Name, Iowa license number, Professional Landscape Architect, State of Iowa. | About 1 3/4 inches. Rubber stamp, electronic image or legible facsimile. | Iowa Code § 544B.12 |
| Kansas | Licensed name, certificate number, LICENSED, KANSAS, LANDSCAPE ARCHITECT. | 1 5/8 inch outer, 1 1/16 inch inner. Rubber stamp, embosser or digital seal. | Kan. Admin. Regs. 66-6-1(a) |
| Kentucky | State of Kentucky, Licensed Landscape Architect, name and license number. | 2 inch circle. Embosser, rubber stamp or electronic image under six conditions. | 201 Ky. Admin. Regs. 10:070 Section 1 |
| Louisiana | State of Louisiana, Licensed Landscape Architect, name, number beneath. | 1 5/8 inch circle. Seal or rubber stamp facsimile. Electronic seal not addressed. | LAC 7:XXIX § 117.B.3.a |
| Maine | No element list in the provisions read. | No size, shape or device. Electronic copies handled as a reliance question. | 32 M.R.S. § 225 |
| Maryland | Name and license number. | No size or shape. Two devices provided for. No electronic provision. | COMAR 09.28.01.05A |
| Massachusetts | Printed figure with your name and registration number. | Figure sets size. Rubber stamp, metal embosser or electronic image. | 242 CMR 3.04(1) |
| Michigan | Licensed name, number, Licensed Landscape Architect, State of Michigan. | No size. No device named. Electronic seal not covered. | Mich. Comp. Laws § 339.2210(1) |
| Minnesota | Optional seal: name and licensed landscape architect. Certification block required. | No size. Regular seal; rubber stamp on tracings. Certification may be electronic. | Minn. Stat. § 326.12, subds. 2 and 3 |
| Mississippi | Name, registration number, Registered Landscape Architect State of Mississippi. | 2 inch circle. No device list. Electronic practice via the signature. | 30 Miss. Admin. Code Pt. 202, R. 1.11.1 |
| Missouri | Licensed name, PLA number, State of Missouri, Professional Landscape Architect. | 1-3/4 inch circle, two rings. Rubber stamp, embossing seal or computer-generated image. | 20 CSR 2030-3.060(1) |
| Montana | Face not stated; seals drawings and specification title pages. | No size, shape, device or electronic provision. | Mont. Code Ann. §§ 37-66-301, 37-66-302, 37-66-308(2) |
| Nebraska | No landscape architect license or seal. | Nothing prescribed. | Neb. Rev. Stat. ch. 81 (no landscape architecture regulation act) |
| Nevada | Name, certificate number, landscape architect; Board supplies the seal. | No size. Board issues physical and electronic versions. | Nev. Rev. Stat. § 623A.195(1) |
| New Hampshire | Licensed Landscape Architect, State of New Hampshire, name, number, twelve leaves. | 1-5/8 inch outer, 1-1/4 inch inner, 1-7/8 inches over leaves. Three devices, one digital. | N.H. Code Admin. R. Lsa 305.03(b) |
| New Jersey | Not confirmed from rule text. | No size in sources read. Device and electronic rule unconfirmed. | N.J.A.C. 13:27, codified text not retrieved |
| New Mexico | Registered name, registration number, New Mexico legend. | No size, shape, device or electronic provision. | 16.44.1.11(B) NMAC |
| New York | Title, State of New York, Great Seal of New York, name, number. | About 1 3/4 inches. Embosser, inked rubber stamp or electronic seal. | 8 NYCRR § 79-1.4 |
| North Carolina | Registered name, certificate number, N.C. Registered Landscape Architect. | No size or shape. Seal, rubber stamp or computer-generated seal; electronic allowed. | N.C. Gen. Stat. § 89A-2(c) |
| North Dakota | Name, license number, DATE line, North Dakota legend. | 1-1/2 to 2 inches. Rubber stamp, embosser or digital image. | N.D. Admin. Code § 8-06-01-02 |
| Ohio | state of Ohio, landscape architect, name and registration number. | 2 inch circle, 1-3/8 inch inner. Embosser, rubber stamp, electronic or other facsimile. | Ohio Admin. Code 4703:1-3-01(A) |
| Oklahoma | Name, Oklahoma license number, a circle, the Oklahoma legend. | No size. Must image on originals and duplicates. Electronic image allowed. | Okla. Admin. Code 55:10-11-8(a)(2) |
| Oregon | REGISTERED, number, signing space, name, OREGON, first registration date, LANDSCAPE ARCHITECT. | About 1-5/8 inches. Crimp, rubber or computer-generated digital stamp. | Or. Admin. R. 804-030-0000(2), (3), (4) |
| Pennsylvania | Registered Landscape Architect, registration number, registered name, Pennsylvania reference. | No diameter or shape. Metal seal, rubber stamp or digital seal. | 49 Pa. Code § 15.33(c) |
| Puerto Rico | Name, Arquitecto Paisajista, serial number, Puerto Rico, expiration date; nothing else. | Exactly 2 inches. No device named. Digital seal left to the Junta. | Reglamento Núm. 7717, Art. XIII |
| Rhode Island | Name, registration number, Registered over the state emblem, Landscape Architect. | Board approves size. Device open, embosser named first. Electronic seal allowed. | 420-RICR-00-00-1 § 1.4(R) |
| South Carolina | State of South Carolina, name, Licensed Landscape Architect, license number. | 1 3/4 inch outer, 1 3/16 inch inner. Impression, rubber or digital seal, or rubber stamp. | S.C. Code Ann. Regs. 76-4.B(3) |
| South Dakota | South Dakota, name, license number, Landscape Architect with optional prefix. | Outer 1 to 2 inches, inner five-eighths. Rubber stamp, embosser, computer-generated or facsimile. | SDCL 36-18A-44 |
| Tennessee | Registered name, number, Registered Landscape Architect, State of Tennessee or Tennessee. | Diagram, no diameter. Embossed, rubber, electronic or transparent self-adhesive. | Tenn. Code Ann. § 62-2-306(b) |
| Texas | Title, State of Texas, registered name, Texas star, number. | 1.5 inches or more. Rubber stamp, impression seal or electronic image. | Tex. Occ. Code § 1052.056 |
| U.S. Virgin Islands | No landscape architect seal; only architect, engineer and land surveyor legends. | Nothing prescribed. | 27 V.I.C. §§ 282, 286(b) |
| Utah | Licensed name, license number, State of Utah, Licensed Landscape Architect. | Circle, 1 1/2 inches minimum. Wet stamp, embosser or electronic seal. | Utah Admin. Code R156-53-601 |
| Vermont | Design set by the Director, not the statute. | No size, device or electronic provision. | 26 V.S.A. § 2628 |
| Virginia | Name, Lic. No. with last six digits, COMMONWEALTH OF VIRGINIA, LANDSCAPE ARCHITECT. | 2 inch circle per the illustration. No device prescribed. Electronic allowed on conditions. | 18VAC10-20-760 B and F |
| Washington | Licensed name, number, Licensed landscape architect, State of Washington, signature, expiration date. | No fixed size; scalable if readable. Ink stamp, embosser or electronic image. | RCW 18.96.150(2) |
| West Virginia | Statute provides for a seal; face not set in its text. | No size or shape. Embosser or inked rubber stamp. Electronic seal unverified. | W. Va. Code § 30-22-18(a) |
| Wisconsin | Credentialed name, credential number and city. | 1-5/8 to 2 inches. Ink, embossing, digitally printed or digitally embedded seal. | Wis. Admin. Code § A-E 2.02(1) |
| Wyoming | Wyoming legend, licensed name, license number and a Date: label. | 1.5 to 2 inches. Rubber stamp, embosser or digital image. | Wyoming Board of Architects and Landscape Architects Rules, ch. 9 § 2(a) |
What does a landscape architect seal show in most states?
Thirty-eight of the 54 rows call for the same core: your name, your license, registration or certificate number, and a title for the profession. In 34 of those the face also names the state, as it does in Alabama, Kentucky and Utah.
A few faces add an emblem. Texas sets the Texas star above your number, New York centers the Great Seal of New York, Rhode Island prints Registered over the state emblem, and New Hampshire rings the seal with twelve leaves. Wisconsin adds your city, while Puerto Rico allows nothing beyond its five items.
At the thin end, Connecticut fixes only the legend, Maine lists no elements, Vermont leaves the design to the Director, and Maryland asks for just your name and license number.
Which states fix the number format or the exact legend?
Five rows set a format for the number. Alaska takes numerals only, Missouri puts PLA in front, Virginia uses a Lic. No. line with the last six digits, Indiana lets you drop the LA letters, and Puerto Rico prints the license serial number.
Florida fixes STATE OF FLORIDA and LANDSCAPE ARCHITECT word for word, Illinois requires its legend verbatim, Mississippi fixes the word order, and North Carolina keeps the N.C. abbreviation. Wyoming, Colorado and North Dakota join the title and the state name with a hyphen.
South Dakota lets Licensed or Registered precede Landscape Architect, Tennessee accepts State of Tennessee or Tennessee alone, and Iowa and Idaho leave room for content the board adds.
How do seal sizes compare from state to state?
Twenty-six rows write a diameter. Fifteen fix one size, from 1-1/2 inches in Arizona, Arkansas and Hawaii to 2 inches in Alabama, Kentucky, Mississippi, Ohio, Puerto Rico and Virginia. Six set a range, three give an approximate figure, and Texas and Utah set only a minimum.
California and South Dakota accept 1 to 2 inches, North Dakota and Wyoming 1-1/2 to 2, Wisconsin 1-5/8 to 2, and Indiana 1 5/8 to 1 7/8. Iowa and New York call for about 1 3/4 inches and Oregon for about 1-5/8; Texas and Utah set a 1-1/2 inch floor with no ceiling.
Massachusetts sets size through its printed figure, Rhode Island through Board approval, and Washington lets you scale the seal while it stays readable. Another 21 rows state no size, and the District of Columbia and New Jersey rows could not confirm one.
Which devices do the rules name?
Thirty rows name an inked or rubber stamp, and 25 name an embosser or a similar pressed seal. Delaware and West Virginia name only those two devices, while 14 rows, Alabama, Colorado and Montana among them, name no physical device.
Unusual entries include a transparent self-adhesive seal in Tennessee, a crimp hand stamp in Oregon, a digitally embedded seal in Wisconsin and a printed seal in Arkansas. Idaho names a rubber stamp or an electronic seal but no embosser.
In Minnesota the device is a regular seal, with a rubber stamp facsimile allowed on tracings or on paper a regular seal would damage. California lets you buy the stamp from any convenient source, and Virginia neither prescribes nor prohibits a device.
Which states accept an electronic or digital seal?
Thirty rows accept an electronic or digital seal, Kentucky, Texas and Wyoming among them. Eleven have no provision, including California, Georgia and Louisiana, and four rows (New Jersey, West Virginia, Puerto Rico and the District of Columbia) leave the question unconfirmed.
Conditions vary. Kentucky allows it once six conditions in Section 2 are met, Ohio lists conditions that must all hold, and Virginia requires unique identification, verifiability and your direct control. Alaska and Kansas apply digital signature tests along the same lines and add that altering the document voids the signature.
North Carolina allows electronic seals but makes stripping the seal the default, Guam accepts an approved electronic image but refuses facsimile or computer-generated signatures and dates, and Nevada issues the electronic stamp itself. Colorado's board may allow one by rule.
Where do the signature and date go?
Ten rows put your signature across the seal. In North Dakota, Utah, Wyoming, Kansas, Mississippi and Tennessee the date crosses it too. Indiana and Virginia want the signature beside the impression, and Louisiana and Ohio apply the seal on top of the signature.
Tennessee also carries the signature past the outer circle and bans rubber signature stamps. Idaho and South Dakota let you sign beside or across, Texas lets the signature cross the impression, and Alaska provides a signing space inside the seal.
Hawaii, Iowa and Minnesota route signing through a block, and Pennsylvania and Wisconsin each allow three seal and signature methods. On dates, Ohio, New York, Puerto Rico, West Virginia and South Carolina require no signing date, and the Indiana signature rule is silent on dating.
Which documents have to carry the seal?
The duty runs from every sheet to a single title page. Mississippi seals each original working drawing sheet, the project manual cover or index pages and every Addendum; Louisiana reaches contracts and estimates; Nevada wants the title page of each document signed, sealed and dated.
Washington limits specification sealing to the cover, title and table of contents pages. Wisconsin seals each sheet by default, but a bound volume may carry it on the title or index sheet alone if that sheet lists the rest and any other credential holder seals their own.
Oklahoma adds addenda and field orders, North Carolina adds letters or certificates giving a professional opinion, and Arkansas exempts presentation documents.
Can you seal after a license lapses or expires?
No, in the 17 rows that address it. Arizona, Georgia, Kansas, Nevada, Tennessee and 12 others bar sealing once the credential expires or is revoked, and several extend the bar to suspension. The other rows either have no seal or do not speak to sealing during a lapse.
Florida requires the seal to be returned or destroyed when registration ends and cancels the electronic signature too. Arizona also reaches anyone who causes or allows the use, and Tennessee bars everyone from using a seal whose named registrant is expired or revoked.
New Hampshire treats a voluntary surrender like a lapse, and Puerto Rico bars stamping during inactivity too. In Kansas, Maine and Minnesota, renewal or reissue restores the right to seal.
Which jurisdictions have no seal rule, an optional seal or an unconfirmed one?
Nebraska does not license landscape architects, and the U.S. Virgin Islands prescribes no landscape architect seal. Minnesota makes the seal optional, the New Jersey and District of Columbia rows leave the face unconfirmed, and in Nevada the Board supplies the seal.
In Nebraska no document has to carry a landscape architect seal, and buying a stamp is not a regulated purchase. Chapter 8 of the Virgin Islands code covers architects, engineers and land surveyors, with legends for those three alone. Minnesota instead requires a certification block with the prescribed sentence, your signature, typed or printed name, date and license number.
The District of Columbia sets seal elements in DCMR 17-1911, which could not be read; commercial permit plans filed with the Department of Buildings carry the stamp and signature of a design professional holding a District license. The New Jersey row cites N.J.A.C. 13:27 without retrieved codified text.
What if you hold licenses in more than one state?
Order a seal for each state. No row provides for a shared multistate seal, and the rows tie the number to the state that issued it: Iowa wants the number Iowa issued you, and North Dakota and Oklahoma each name their own license number.
A legend that names a state names only its own, and sizes conflict: a 2 inch Kentucky seal exceeds the 1 7/8 inch ceiling in Indiana. Titles differ too, from Professional Landscape Architect in Missouri and Iowa to Registered Landscape Architect in Alabama and Mississippi.
What should you supply when ordering a landscape architect seal?
Supply your name exactly as your license or certificate shows it, your number in the format your state sets, and any date the face must carry. Colorado, Oregon, Washington, California and Puerto Rico each print a date tied to your license.
Colorado shows the date you were licensed and Oregon your first registration date; Washington and Puerto Rico show your expiration date, and California your renewal date plus the sealing date. Arizona, North Dakota and Wyoming print a date label or date line.
Add any extra line or choice your rule allows, such as your city in Wisconsin or the Licensed or Registered prefix in South Dakota, and pick a device and size your rule names. In Nevada, the Board supplies the seal.
Related: electronic seal rules by profession and firm seal and certificate of authorization requirements by state.
Frequently asked questions
Does renewing my license mean buying a new seal?
The rows point to one trigger: a date on the face that changes with renewal. Washington prints your expiration date and California your renewal date, so renewal reaches the device. Oregon prints your initial registration date, which never changes, and the Texas seal shows no date and keeps the same number, so it stays current.
Who decides the design when the rule says the board authorizes it?
The board or its equivalent. The Nevada Board issues the seal, the Guam Board sets the design, Vermont leaves it to the Director, and Michigan, Hawaii and Washington follow a board-authorized design. The Puerto Rico Junta also authorizes a special design, though Reglamento Núm. 7717 still fixes its size and contents.
Can the impression be scaled down for a small sheet?
Washington is the one row that lets you scale the seal, provided it stays readable. Arizona allows 1/16 inch either way, and range states such as North Dakota and Wisconsin let you choose any diameter inside their bounds. Single-figure rows such as Alabama and Puerto Rico give no allowance.
Does a landscape architecture firm need its own seal?
Not in the rows that mention firms. Guam prescribes no firm seal and requires no firm number on documents, and Puerto Rico has no certificate of authorization, so individuals seal and sign. None of the other rows addresses a firm seal.
What happens to the seal when I stop practicing?
Florida is the only row with a rule on it: when registration ends, the seal is returned or destroyed. Missouri imposes no duty to destroy or return it, Rhode Island and South Carolina say nothing about the device, and South Dakota holds you responsible for keeping the seal secure.
Does the impression have to reproduce on copies?
In several rows, yes. Florida judges the seal by what shows on a duplicate, Oklahoma requires an image on originals and duplicates, and Texas holds each device to a reproduction test. Illinois requires a seal that reproduces, and Iowa and Arkansas require a legible result.
Once your state row settles the wording, size and device, order from our landscape architect stamps and seals by state, and send your name, number and any face date exactly as your license shows them.
