--- title: "Greenhouse Permit Denied? Common Reasons and How to Fix Them" description: "Why greenhouse permits get refused: size caps, the wrong yard, height, rear yard coverage, too many utilities, no permitted home, a missing survey. Sourced." url: https://yespermit.com/greenhouse-permit-denied/ updated: 2026-10-13 language: en-US --- # Why greenhouse permits get refused Greenhouse applications are refused when the plan breaks a written rule: larger than the zoning cap for the district, in a yard where greenhouses are not allowed, too tall or covering too much of the rear yard, more electricity or plumbing than an exemption allows, no lawfully built home on the lot, or a file without the survey. *Updated October 13, 2026. Every regulatory fact below links to its official source.* ## Key facts - The model International Residential Code exempts one-story detached accessory structures up to 200 square feet from a building permit.[^4] - In Park Forest, Illinois, the maximum area of a greenhouse or shed is 120 square feet in the R-1 to R-4 districts, and a building permit is required to install or replace one.[^1] **We handle the permit. You build.** All-in, until approved: $399 (Fall 2026 launch price, valid through November 30, 2026; regular price $499), approved or your money back ([conditions](https://yespermit.com/guarantee/)): [order](https://yespermit.com/all-in/). Prefer to file it yourself? [Permit Kit](https://yespermit.com/permit-kit/), $349. ## Why do greenhouse permits get refused? Most greenhouse refusals have nothing to do with the greenhouse itself. They come from zoning: which yard, how big, how tall, and whether the lot qualifies at all. The building code exemption for small structures does not change any of that. | Reason | The rule | Example | | --- | --- | --- | | Too big for the district | A maximum area for greenhouses | Park Forest: 120 square feet in R-1 to R-4[^1] | | Wrong yard | Greenhouses only in some yards | Park Forest: interior side and rear yards only[^1] | | Too close to the lines | Minimum setbacks | Park Forest: 5 feet from the rear lot line, 3 feet from an interior side line[^1] | | Too tall | A height cap | Park Forest: 14 feet[^1]; New York City: 10 feet for a detached greenhouse in the rear yard[^3] | | Covers too much of the yard | A share of the required rear yard | New York City: 25 percent at most[^3] | | Too much electricity or plumbing | Limits attached to an exemption | Humboldt County: two hose bibs, two lights, two outlets, 100-amp subpanel[^2] | | No home on the lot | Accessory to an existing residence | Park Forest[^1]; Humboldt County[^2] | | Missing documents | Survey, plans, layouts | Park Forest: plat of survey[^1]; Humboldt County: plot plan and floor plan[^2] | ## The rules behind most refusals ### The 200 square foot myth The model International Residential Code exempts one-story detached accessory structures up to 200 square feet from a building permit[^4]. That is a building code rule. Zoning is separate, and it can be stricter: in Park Forest, Illinois, the maximum area of a greenhouse or shed is 120 square feet in the R-1 to R-4 districts, and a building permit is required to install or replace one[^1]. A 160 square foot kit that would be exempt elsewhere is simply too big there. ### Wrong yard, wrong distances Park Forest allows greenhouses in the interior side and rear yards only, and its accessory structures must sit at least 5 feet from any rear lot line and 3 feet from any interior side lot line, while leaving access to utility easements[^1]. A greenhouse in the front yard, or tight against the back fence, is refused on the site plan. ### Height and rear yard coverage In New York City, a non-commercial greenhouse accessory to a home is a permitted obstruction in the required rear yard, but with limits: a detached greenhouse can stand no more than 10 feet above the yard, an attached one no more than one story or 15 feet, and the greenhouse cannot cover more than 25 percent of the required rear yard[^3]. Park Forest caps every accessory structure at 14 feet[^1]. Tall ridge lines on large kits break these limits. ### The utilities outgrow the exemption Humboldt County, California, exempts personal-use greenhouses up to 400 square feet from the building permit, two per legal parcel at most, but the exemption allows no more than two hose bibs, two light fixtures, two electrical outlets and a 100-amp subpanel, and no separate electrical service[^2]. Add a third circuit of grow lights or a dedicated service and the greenhouse is no longer covered. The form also asks for the electrical and plumbing layouts of each structure[^2]. ### No lawful home on the lot A greenhouse is an accessory structure: it has to be accessory to something. Park Forest does not allow an accessory structure to be built before the main building it serves[^1]. Humboldt County checks that the parcel is legal, that the greenhouse is detached and on the same building site as the residence, and asks for evidence of an existing permitted residence[^2]. ### Commercial use New York City's rear yard allowance is for a non-commercial greenhouse accessory to a residential building[^3]. Growing for sale can move the project into another category with other rules. ### An incomplete file Park Forest asks for the application, a plat of survey showing where the greenhouse will stand, and the contractor's signed proposal or the homeowner's waiver[^1]. Humboldt County asks for a plot plan in four copies and a floor plan in three, with the dimensions and square footage of each structure and any grading[^2]. A missing survey or layout sends the file back. ## What happens if you build it anyway - **Stop work, then fines and a lien.** In Santa Clarita, California, greenhouses over 120 square feet need a building permit; the city can issue a stop work order for unpermitted construction and, if work continues, the owner is subject to fines and a lien on the property[^5]. - **A penalty to legalize or to remove.** In New York City, legalizing work done without a permit on a one- or two-family home carries a $600 civil penalty, and removing the illegal work carries the same penalty[^6]. ## How to get it approved the first time 1. Read your district's limits for greenhouses: area, yard, height and setbacks[^1]. 2. Check whether the greenhouse is attached or detached; the rules and the filing differ[^3]. 3. Count the outlets, lights and water connections against any exemption[^2]. 4. Draw the greenhouse on a survey or scaled site plan with every distance[^1]. 5. Keep the kit's manual and drawings with the application. The All-in offer builds this file for your address, follows the city's comments until approval, and comes with our money-back guarantee if the city refuses the permit for a written requirement we should have caught. ## Common questions ### Why was my greenhouse refused when it is under 200 square feet? Because 200 square feet is the model building code exemption, not a zoning allowance. Your city can cap greenhouses lower; Park Forest, Illinois, limits a greenhouse to 120 square feet in its R-1 to R-4 districts and requires a building permit for it. ### Can I put a greenhouse on an empty lot? Often not. Park Forest does not allow an accessory structure to be built before the main building it serves, and Humboldt County, California, grants its greenhouse exemption only as an accessory use to an existing, lawfully constructed residence. ### Can I add more outlets and lights later? Check first. Humboldt County's exemption allows no more than two hose bibs, two light fixtures, two outlets and a 100-amp subpanel, with no separate electrical service. Going beyond that means the exemption no longer covers the greenhouse. ### Can a greenhouse be refused for its height? Yes. Park Forest caps accessory structures at 14 feet, and New York City limits a detached greenhouse in the required rear yard to 10 feet above the yard. ## Get it done **We handle the permit. You build.** All-in, until approved: $399 (Fall 2026 launch price, valid through November 30, 2026; regular price $499), approved or your money back ([conditions](https://yespermit.com/guarantee/)): [order](https://yespermit.com/all-in/). Prefer to file it yourself? [Permit Kit](https://yespermit.com/permit-kit/), $349. ## Sources [^1]: [Village of Park Forest, Illinois, Building Department, Accessory Structures, Greenhouse or Shed (Chapter 118, rev. 3-2018)](https://villageofparkforest.com/DocumentCenter/View/3133), checked October 13, 2026. [^2]: [County of Humboldt, California, Planning and Building Department, Residential Accessory Greenhouse Exemption Form (revised 10/2/2020)](https://humboldtgov.org/DocumentCenter/View/116674/Residential-Accessory-Greenhouse-Exemption-Form-PDF), checked October 13, 2026. [^3]: [New York City Department of Buildings, Project Categories, Installation of a New Greenhouse, Grade Level and Rooftop](https://www.nyc.gov/site/buildings/dob/project-categories-greenhouse.page), checked October 13, 2026. [^4]: [City of Federal Way, Washington, Residential permit exemptions (International Residential Code, Section R105.2)](https://www.federalwaywa.gov/page/residential-permit-exemptions), checked October 13, 2026. [^5]: [City of Santa Clarita, California, Building and Safety, Stop Work Order Information](https://santaclarita.gov/building-safety/?p=1012), checked October 13, 2026. [^6]: [New York City Department of Buildings, Form L2 instructions, civil penalties for work without a permit (rev. 03/2026)](https://www.nyc.gov/assets/buildings/pdf/l2_instr.pdf), checked October 13, 2026. --- Source page: https://yespermit.com/greenhouse-permit-denied/ ยท YesPermit, sold by LACANGEL GROUP SAS, 1 rue Marguerin, 75014 Paris, France. Prices in US dollars, taxes included. YesPermit prepares permit applications; it is not an architect, engineer or law firm, and the city or county decides on every permit. Site summary for AI assistants: https://yespermit.com/llms.txt