Plot Plan: What It Is, vs. a Site Plan, How to Get One

A plot plan is a drawing of one lot, seen from above. It shows the lot lines and their dimensions, the buildings on the lot, and how far each building sits from the lot lines. Its main use is a building permit application. Each city or county decides what it calls the drawing, what it must show and whether it must be to scale.

Pillar, a land research software company, wrote this guide. Permit rules are local, so every requirement below belongs to the city, town or county named. We read each source on November 15, 2026. This is general information, not legal or surveying advice. Confirm the rules for your lot with the local building department and a licensed surveyor in your state.

What is a plot plan?

Permit offices define it in their own handouts. Weld County, Colorado calls it "an accurate drawing or map that shows the size and shape of your property and the location of any man-made features such as buildings, driveways, walls, septic leach fields, propane tanks and wells," and says it shows both what exists and what is proposed (Weld County plot plan handout, revised February 2014). Frisco, Texas calls it "a plan drawn to scale showing the entire property (including all property lines) with the existing and proposed structures, including parking" (Frisco residential plot plan requirements, revised April 2018).

A model code addresses the drawing too. Section R106.2 of the 2021 International Residential Code is titled "Site plan or plot plan." It says the construction documents submitted with a permit application "shall be accompanied by a site plan showing the size and location of new construction and existing structures on the site and distances from lot lines" (2021 IRC, chapter 1). The same section lets the building official waive or modify the requirement where the permit is for alteration or repair, or where otherwise warranted. The IRC is a model code, so it applies only where a state or local government has adopted it.

Plot plan vs. site plan vs. survey vs. plat

Plot plan vs. site plan. For a house permit, the two names often mean the same drawing. The IRC section above uses both in its title. Frisco's plot plan handout asks "How do I draw the site plan myself?" The names separate in development review. New York's Town Law, which governs towns in that state, defines a site plan as "a rendering, drawing, or sketch prepared to specifications and containing necessary elements, as set forth in the applicable zoning ordinance or local law, which shows the arrangement, layout and design of the proposed use of a single parcel of land as shown on said plan" (N.Y. Town Law 274-a). As we read these sources, a site plan in that sense is the layout a local board or office reviews, and a plot plan is the permit drawing for one lot.

Plot plan vs. survey. A survey establishes where the lot lines are. A plot plan uses those lines to place buildings. Weld County's first step for preparing a plot plan is to determine the property boundaries, which "may require a survey by a licensed surveyor." See our boundary survey guide. A topographic survey adds ground elevations, which some plot plan checklists also ask for.

Plot plan vs. mortgage inspection plan. The drawing a lender orders at closing is a different document. Ohio's rules define a mortgage location survey as proof to the lender or title insurer "that the building(s) and/or other improvements are actually located on the land covered by the legal description in the mortgage," prepared "solely for the intent of and use by the mortgagee and/or title insuror" (Ohio Adm. Code 4733-38-01). The drawing must state that it is not a boundary survey (4733-38-05). Asked whether an owner can use the mortgage inspection plot plan from the closing, Bedford answers "No" and says such plans "can have discrepancies of up to several feet."

Plot plan vs. plat. A plat divides a tract into lots. Washington defines it as "a map or representation of a subdivision, showing thereon the division of a tract or parcel of land into lots, blocks, streets and alleys, or other divisions and dedications" (RCW 58.17.020). A plat shows how the land was divided. Do not assume it shows the buildings now on the lot. Our plat map guide reads one line by line.

What do permit offices require on a plot plan?

We read the published plot plan rules of five places in five states. They differ most on who may draw the plan.

Northborough, Massachusetts: certified. The town's page says its zoning bylaw requires a certified plot plan for any building or structure, new or addition, or in-ground swimming pool for which a building permit is required. Agricultural buildings, tents, sheds and on-ground or above-ground pools are not included. "The Plot Plan must be prepared and certified by a Professional Engineer or Registered Land Surveyor in accordance with the Massachusetts registration laws." The plan must show lot lines, all existing buildings and structures, all easements, the new construction with perimeter dimensions, and setback distances from the front, side and rear lot lines. Required notations include the zoning district, a certification that the plan conforms to the town's zoning bylaws, and a flood hazard determination from the Flood Insurance Rate Map. (Northborough certified plot plans).

Frisco, Texas: owner-drawn for small projects. "Most plot plans are not required to be professionally sealed and stamped," and building inspections staff make the final call on whether a project needs a professional survey. An owner may draw the plan when applying for a minor accessory structure, such as a fence, storage shed or patio cover, and only if the owner knows where the property line is. The plan must show the owner's name; site boundaries, dimensions, lot lines, acreage and square footage; a north arrow, the scale and a title block with the subdivision name, block, lot number and address; and existing and proposed building locations, accessory structures, fence height, dimensions between buildings on the same lot, building lines, easements and setbacks.

Weld County, Colorado: hand-drawn for rural property, subdivisions and platted townsites. Plot plans are required for new construction, accessory structures and additions, and not for interior remodels. Drawings for rural property, subdivisions or platted townsites "can be hand-drawn and do not have to be to scale." Plot plans for commercial or industrial zone districts "will require a scaled drawing by an architect, engineer, or surveyor." The ten required items include property lines and dimensions, setback dimensions, graveled or impervious paved areas, and all oil and gas production facilities within 200 feet of a proposed structure.

Tehama County, California: one plan, four departments. The instructions list steps to complete in order: submit the plot plan to planning, building, environmental health and the fire department, then, after they sign off, to the building department for plan check and permit issuance. An attached fire protection page lists plans that office does not see: inside remodels with no square footage increase, swimming pools and spas, septic or well only, and slabs (porches). The instructions say to contact the departments first for requirements specific to your parcel. The checklist asks for a 1 inch = 50 feet engineering scale or finer, the location and dimensions of all property lines, structures marked existing or proposed, setbacks, utilities, areas subject to flooding, and existing and proposed wells and septic systems. The instructions suggest starting from an assessor's plat map. As we read them, they are written for the applicant and name no licensed preparer (Tehama County plot plan instructions).

Clark County, Washington: elevations and lot coverage. A plot plan is required for all residential building applications except interior remodels. An engineer's scale is required, though parcels over one acre "do not need to be drawn to scale as long as they are proportioned properly." The checklist asks for property lines and dimensions, easements, lot coverage, the footprint of the proposed structure, numerical elevations at the four corners of the structure and at the property corners, and setbacks from the closest point of the structure to the property lines. The checklist does not say who must prepare the plan (Clark County residential permit packet, revised August 4, 2025).

What is a certified plot plan?

It is a plot plan prepared and stamped by a licensed professional. Bedford, Massachusetts defines it: "A certified plot plan is a plot plan that has been stamped by a registered land surveyor or civil engineer" (Bedford residential permit FAQ). The town says it is needed to verify that a proposed building, addition or accessory structure meets the minimum setbacks in its zoning bylaws.

Massachusetts towns publish different triggers and different preparers:

• Hudson requires one for any new building, structure or accessory structure, naming sheds, swimming pools and fences, and for any change to an existing footprint. Asked whether an owner who is certain of the property line can prepare one, the town answers: "No. Plot plans can only be prepared by a Registered Land Surveyor, and must bear his/her stamp." A mortgage plan can be used only if the project is far in excess of the required setbacks, "generally, at least 15 feet in excess" (Hudson building FAQ).
• Melrose requires that applications for new construction include "a current, scaled plot plan drafted by a registered land surveyor" (Melrose FAQ).
• Bedford requires one for a new house, addition, detached accessory structure, swimming pool or deck.

A town may ask for a second plan after the foundation is poured. In Hudson, for all new houses and for additions close to the required setbacks, a certified as-built plot plan must be submitted after the foundation is complete, and framing cannot proceed until it has been.

How to get a plot plan of your property

1. Ask the building department for the permit file. Weymouth, Massachusetts says that if a plot plan was previously submitted for building or construction purposes, a copy will be on file with its building department, and that copies can be purchased "at a nominal fee" (Weymouth planning FAQ). Ventura County, California lists "Zone Clearances/Plot Plans" among the building records releasable to the public and takes requests by address or parcel number (Ventura County records search request). An old plan helps only if the office accepts it. In Bedford, reusing a certified plan from the property file is at the building official's discretion, and the plan must be to scale and accurately show the current house and all accessory structures.
2. Check your closing documents. You may find a survey or a mortgage inspection plan. Read its title and notes before relying on it, for the reasons above.
3. Pull the recorded plat. It gives the lot's record dimensions, easements and any platted building lines. Do not expect a plot plan at the land records office. The Suffolk County Registry of Deeds in Massachusetts says it does not have certified plot plans. In most instances it has a plan of the land, which shows the layout of streets and lots (Suffolk Registry of Deeds).
4. Ask the builder. If the house is recent, the builder or the builder's surveyor may still have the plan filed with the original permit.
5. Hire a surveyor or engineer. Weymouth says that if no plan is on file, "it may be necessary to hire a registered land surveyor or professional engineer to prepare a plan."

How to draw a plot plan yourself

Draw your own only where the office accepts it for your project. Frisco's handout gives the method:

1. Get the lot dimensions from the record. Frisco tells owners to take the property line dimensions from the final plat records, then measure how far the house and each accessory structure sit from the property lines.
2. Pick a standard scale. Frisco requires a standard architect's or engineer's scale and suggests 1 inch = 20 feet. By our arithmetic, a 100-foot lot line is then 5 inches long on paper.
3. Draw the lot lines first, then the house and every accessory structure, at the same scale.
4. Add every item on your office's checklist. Frisco's list is above and includes fence height and the dimensions between buildings on the same lot. Weld, Tehama and Clark counties also list wells and septic systems among the items to show. The lists and scale rules differ, so use the one for your project.

Two warnings come from the same handout. "Website maps and Google satellite maps are not accurate enough to meet the plot plan requirements." Fences and public sidewalks are not necessarily on the property line, so they cannot be used to locate it. A county GIS parcel map is not a survey either. Our guide to finding property lines explains which records and markers count.

How much does a plot plan cost?

We found no permit office that publishes a price for preparing one. What offices publish is narrower:

• A county map sold as a plot plan. Lancaster County, Pennsylvania sells "a Plot Plan or Tax Map" through its GIS and property assessment offices for $15 plus tax at 8.5 by 11 inches and $30 plus tax at 11 by 17 inches (Lancaster County FAQ). Ask the permit office whether it accepts a county map before paying.
• An incomplete application. Clark County adds a $296 fee to the permit if it rejects the intake a second time for the same missing requirements.

A certified plot plan is priced by the surveyor or engineer who prepares it. Our land survey cost guide collects published survey fees.

What a plot plan means when you buy or build on land

A plot plan answers one question: does the building fit on the lot under the rules? Test that before paying for the drawing.

• Setbacks. Find the zoning district and its front, side and rear setbacks. For a rectangular lot, subtract the front and rear setbacks from the depth and the side setbacks from the width. That is a first pass, before easements, coverage limits and any other standard that applies to the lot. Our R1 zoning guide compares these numbers across cities.
• Easements. Frisco states that no structures are allowed in utility easements. Look for them on the recorded plat and in the title commitment. Our utility easement guide covers what an owner can build in one.
• Lot coverage and paved area. Clark County's checklist requires lot coverage. Weld County's requires the location and dimensions of graveled or impervious paved areas. See our guide to impervious surface limits.
• Flood, septic and well. Northborough requires a flood hazard determination on the plan. Tehama County requires wells and septic systems on adjacent parcels to be shown if they are within 150 feet of any existing or proposed well or sewage disposal area.
• When it does not fit. A building that cannot meet a setback needs a redesign or zoning relief. Our guide to getting a zoning variance explains that process.

Before an offer on a lot you plan to build on, ask the seller for any survey or plot plan, request the permit file, read the plat, and ask the building department who must prepare the plot plan for your project. Pillar's site plan tool sketches conceptual lots and roads on a site boundary. That concept sketch is not a plot plan and does not replace a survey.

Quick answers

Is a plot plan the same as a site plan? For a house permit, often yes. The 2021 IRC titles its rule "Site plan or plot plan." In development review, a site plan is the layout of a proposed use that the local government reviews.

Is a plot plan the same as a survey? No. A survey establishes the lot lines. A plot plan places buildings relative to them.

Can I draw my own plot plan? It depends on the office and the project. Frisco, Texas allows it for minor accessory structures if you know where your property line is. Hudson, Massachusetts does not allow it.

Where can I get a copy of my plot plan? Start with the building department's permit file for your address. Then check your closing documents and the recorded plat, and ask the builder.

Can I use my mortgage inspection plan for a permit? Ask the office. Bedford, Massachusetts says no. Hudson, Massachusetts allows it only when the project is far in excess of the required setbacks.