How much space does the law actually require for a backyard hen?

Where a city sets a figure at all, the binding minimums we found run from 2 to 4 square feet of coop floor per hen. Plenty of the codes we read while compiling this set no space figure at all — they cap the number of birds, ban roosters and impose setbacks from the neighbours, then say nothing about the area each hen gets. We have not counted how common that is, and this table deliberately over-samples the cities that do regulate space, because those are the ones that can be compared with a welfare standard.

How does that compare to what welfare organisations recommend?

The RSPCA in the UK asks for 1 m² — about 10.8 sq ft — of housing per bird "where possible", and says birds should never be stocked at more than three per m² of coop. Against the municipal minimums we verified, that is 2.7 to 5.4 times more space than the law requires.

Can a city really limit how much space you give your hens?

Yes, and two of the ordinances we read do exactly that. Center City, Minnesota caps coops at 10 sq ft per chicken and runs at 20 sq ft per chicken. Marion, Illinois caps the whole coop at 40 sq ft regardless of flock size. These are structure-size rules aimed at the look of the neighbourhood, but the effect is a legal ceiling on the space a hen may be given.

Why do the numbers differ so much between cities?

Because the two sets of rules are answering different questions. A municipal ordinance is written to manage the relationship between neighbours: noise, smell, sightlines, property values. A welfare recommendation is written to describe what the bird needs. They are not competing answers to the same question, which is exactly why a keeper should not read a city minimum as a target.

Is this list complete?

No, and it does not claim to be. This is a first edition covering the ordinances we have read in full and verified against the official municipal code. We publish the method so it can be checked, and we will add jurisdictions as we verify them. Any figure we could not trace to an official source is not in the table.

Can I reuse this data?

Yes. The compiled table is published under a Creative Commons Attribution 4.0 licence — use it, quote it, chart it, as long as you credit FlockSavvy and link back. If you are a city, an extension service or a welfare organisation and want the underlying figures in another format, email hello@flocksavvy.com and we will send them.

How much space is a backyard hen entitled to?

Cities across the English-speaking world let residents keep hens. Very few of them say how much room each hen must get — and where they do, the figure is a fraction of what animal welfare organisations recommend. We read the ordinances and put the numbers side by side.

What we found

Ordinances regulate the neighbours, not the hen. Of the 6 jurisdictions here, 5 impose a setback from the property line or neighbouring homes, 5 ban roosters outright and 5 require a permit — several with an inspection, a neighbour-notification period or a mandatory class attached. The rules are detailed about what the neighbours will see, hear and smell.
Where a binding figure exists — 5 of these 6 — it runs 2–4 sq ft of coop floor per hen. The RSPCA in the UK asks for 1 m² (10.8 sq ft) per bird where possible — between 2.7× and 5.4× more than the law requires.
Two cities cap the maximum. In Center City, Minnesota, a coop may not exceed 10 sq ft per chicken. Giving a hen the housing the RSPCA recommends would break the ordinance.
The arithmetic can bite. Marion, Illinois allows 10 hens and requires 4 sq ft each — then caps the coop at 40 sq ft. At the maximum permitted flock, the minimum is also the maximum.
Some cities ask more of the keeper than of the coop. University Heights, Ohio requires an approved poultry-keeping class, an annual inspection and a hearing before the Board of Zoning Appeals — and mandates 2 sq ft per hen.

Municipal minimums

Each row was read in the official municipal code and is quoted below the table. Where a city publishes a figure only as guidance rather than in the code itself, we say so — the distinction matters, because guidance is not enforceable and is easy to mistake for law.

City	Max hens	Coop / hen	Run / hen	Setback	Status
PortlandOregon	4	2 sq ft 0.19 m²	10 sq ft	—	guidance only
RainierOregon	5	3 sq ft 0.28 m²	—	7 ft	in the code
University HeightsOhio	4	2 sq ft 0.19 m²	—	20 ft	in the code
Center CityMinnesota	—	4 sq ft 0.37 m² max 10 sq ft	— max 20 sq ft	50 ft	in the code
MarionIllinois	10	4 sq ft 0.37 m² coop capped at 40 sq ft	8 sq ft	15 ft	in the code
West ColumbiaSouth Carolina	4	2 sq ft 0.19 m²	9 → 5 sq ft each as the flock grows	25 ft	in the code

What welfare organisations recommend

Source	Housing	Run or total	Status
RSPCA United Kingdom	1 m² (10.8 sq ft) per bird where possible; never more than 3 birds per m²	no numeric figure published for the run	recommendation
RSPCA Australia	given as a combined figure →	3 m² for 3 large birds or 6 bantams, then +0.4 m² per extra large bird, +0.3 m² per extra small one	recommendation
Humane World United States	no coop floor figure given	20 sq ft (1.9 m²) per bird if confined during the day	recommendation

Why the two sets of numbers are so far apart

It is tempting to read this as cities being careless about animals. That is not quite what the documents show. A municipal ordinance is written to manage the relationship between neighbours — noise, smell, sightlines, the fear that a coop will look like a farmyard. Read them in that light and they are coherent: Center City requires a 50 ft setback from adjacent homes and a screening fence, and caps the coop at 10 sq ft per bird, because a bigger structure is a bigger visual intrusion. The hen is not the subject of the sentence.

A welfare recommendation answers a different question: what does the bird need in order to be healthy? The RSPCA in Australia is explicit about the consequences, citing reduced lameness and fewer bumblefoot problems at lower stocking densities. Those two documents are not competing answers to the same question — which is exactly why a keeper should never read a municipal minimum as a target.

The practical rule that follows: the ordinance tells you what you may build. It does not tell you what your birds need. Check the first, then build for the second — and if your city caps the size of the coop, that cap should also cap the number of birds you keep in it.

Method, and its limits

Every figure was read in the official municipal code or on the welfare organisation's own page, and is quoted verbatim in the sources below. No figure comes from a blog, a retailer or an aggregator.
We distinguish binding code from published guidance. Portland, Oregon is the clearest example: its widely quoted 2 sq ft and 10 sq ft figures appear under "Best practices", while the code itself sets no space requirement at all.
Ordinances change. Each row carries the date we checked it. Confirm with your city before you build — this page is research, not legal advice.
This is a first edition and a small sample. 6 jurisdictions is enough to show the pattern, not enough to quantify how common it is. We are adding jurisdictions as we verify them, and we would rather publish 6 sourced rows than fifty unsourced ones.
The sample is deliberately biased, and you should know how. We went looking for ordinances that specify an area per bird, because those are the ones that can be compared with a welfare standard. So this table over-represents cities that regulate space at all. Most municipal codes we came across while searching cap the flock, ban roosters and set a setback without ever stating how much room a hen gets — which makes the gap documented here the best case, not the typical one. Quantifying how many cities say nothing would need a random sample of ordinances, which is a bigger piece of work and is not what this is.
Conversions use 1 m² = 10.7639 sq ft. Metric figures are rounded to two decimals.

Free to cite

This compilation is published under a Creative Commons Attribution 4.0 licence. Quote it, chart it, republish the table — please credit FlockSavvy and link to this page.

Journalists, city staff and welfare organisations: if you want the underlying figures as a spreadsheet, or want your jurisdiction added, email [email protected]. We will send the data and add the row.

Sources

Each entry links to the official text and quotes the operative sentence. Checked on the date shown.

Portland, Oregon — municipal code. Official text. Checked 2026-09-02.
Recommendations on the size and configuration of the coop: at least two square feet of indoor space for each chicken and ten square feet of outdoor run per chicken.

City code 13.40.020 caps flock size and bans roosters but sets NO space-per-bird requirement. The square-footage figures appear only under 'Best practices'.
Rainier, Oregon — Rainier Municipal Code 6.20.030 (Ord. 1060 s 3, 2013). Official text. Checked 2026-09-02.
The coop shall provide a minimum of three square feet per chicken and be of a sufficient size to permit free movement of the chickens.
University Heights, Ohio — University Heights Codified Ordinances 1478.251 (Ord. 2018-15, passed 4-2-2018). Official text. Checked 2026-09-02.
A minimum of two square feet must be provided per chicken within the chicken coop.
Center City, Minnesota — Center City Code of Ordinances 93.15 (Ord. 2016-12-6A, passed 12-6-2016). Official text. Checked 2026-09-02.
All chicken coops must have a minimum 4 square feet per chicken and must not exceed 10 square feet per chicken and must not exceed 6 feet in total height. Fenced-in chicken runs must not exceed 20 square feet per chicken and fencing must not exceed 6 feet in total height.

REMARKABLE: this ordinance sets a MAXIMUM space per bird, not just a minimum. Giving a hen the 1 m2 (10.76 sq ft) of coop the RSPCA UK recommends would exceed the 10 sq ft cap.
Marion, Illinois — Marion, IL City Code 6-4-5-9 (Ord. 3902, 2023). Official text. Checked 2026-09-02.
Chicken coops are required to have at least four (4) square feet of coop floor area per chicken and must be well maintained. In no case shall the floor area of a chicken coop exceed forty (40) square feet. Chicken coops shall not exceed eight feet (8') in height. Enclosures must have at least eight (8) square feet of outdoor run space per chicken.

The arithmetic bites: 10 hens x 4 sq ft = 40 sq ft, exactly the coop cap. At the maximum permitted flock it is impossible to give each hen more than the bare minimum.
West Columbia, South Carolina — West Columbia, SC Code of Ordinances Sec. 6-3-20. Official text. Checked 2026-09-02.
Coops shall contain at least two (2) square feet in bottom surface area per chicken over four (4) months of age and must be connected to a run of not less than nine (9) square feet for one (1) bird; twelve (12) square feet for two (2) birds; sixteen (16) square feet for three (3) birds; or twenty (20) square feet for four (4) birds over four (4) months of age, which shall be fully enclosed.

Minimum coop height is 18 inches (about 45 cm) - roughly the standing height of a hen. Eggs may not be sold.
RSPCA (UK) — welfare recommendation. Official page. Checked 2026-09-02.
Housing of at least 1m2 should be provided per bird, where possible. If this isn't possible, birds should be stocked at no more than three birds per m2 of coop.

Nest boxes: one per five hens, minimum two, at least 30x30x30cm. Perch 3-5cm wide, height 40cm.
RSPCA Australia — welfare recommendation. Official page. Checked 2026-09-02.
Current recommendations are for a minimum floor/run area of 3 m2 for housing up to six bantams or three large birds. Additional birds will require an increase in enclosure size of at least 0.4 m2 for every large bird and 0.3 m2 for every small bird.

Cites reduced lameness and fewer bumblefoot problems at lower stocking densities.
Humane World (formerly HSUS) — welfare recommendation. Official page. Checked 2026-09-02.
at least 20 square feet each (if chickens are confined during the day); at least one nesting box for every four chickens and a roosting bar that provides at least 1 foot of space for each chicken

Gives NO coop floor area figure at all.

Working out what your own flock needs? Our coop size calculator and run size calculator do the arithmetic in feet or metres, and the run calculator shows how your figure compares to each of the standards on this page.

Common questions

How much space does the law actually require for a backyard hen?: Where a city sets a figure at all, the binding minimums we found run from 2 to 4 square feet of coop floor per hen. Plenty of the codes we read while compiling this set no space figure at all — they cap the number of birds, ban roosters and impose setbacks from the neighbours, then say nothing about the area each hen gets. We have not counted how common that is, and this table deliberately over-samples the cities that do regulate space, because those are the ones that can be compared with a welfare standard.
How does that compare to what welfare organisations recommend?: The RSPCA in the UK asks for 1 m² — about 10.8 sq ft — of housing per bird "where possible", and says birds should never be stocked at more than three per m² of coop. Against the municipal minimums we verified, that is 2.7 to 5.4 times more space than the law requires.
Can a city really limit how much space you give your hens?: Yes, and two of the ordinances we read do exactly that. Center City, Minnesota caps coops at 10 sq ft per chicken and runs at 20 sq ft per chicken. Marion, Illinois caps the whole coop at 40 sq ft regardless of flock size. These are structure-size rules aimed at the look of the neighbourhood, but the effect is a legal ceiling on the space a hen may be given.
Why do the numbers differ so much between cities?: Because the two sets of rules are answering different questions. A municipal ordinance is written to manage the relationship between neighbours: noise, smell, sightlines, property values. A welfare recommendation is written to describe what the bird needs. They are not competing answers to the same question, which is exactly why a keeper should not read a city minimum as a target.
Is this list complete?: No, and it does not claim to be. This is a first edition covering the ordinances we have read in full and verified against the official municipal code. We publish the method so it can be checked, and we will add jurisdictions as we verify them. Any figure we could not trace to an official source is not in the table.
Can I reuse this data?: Yes. The compiled table is published under a Creative Commons Attribution 4.0 licence — use it, quote it, chart it, as long as you credit FlockSavvy and link back. If you are a city, an extension service or a welfare organisation and want the underlying figures in another format, email [email protected] and we will send them.