Post Ranch Inn
47900 Highway 1, Big Sur
The stay
Redwood and stone houses above the Pacific; the inn says its materials are low-emitting.
Post Ranch has stood on its ridge since 1992: tree houses, ocean houses with grass roofs and cliff houses curved around old oaks, twelve hundred feet above the water. Interiors are reclaimed redwood, stone and glass, and the effect is of being inside the landscape rather than looking at it.
Its published sustainability page is one of the most specific we have read. The inn says it uses low-emitting adhesives, paints, coatings and carpeting, runs an indoor air quality management plan with HEPA filters in public spaces, and makes its sheets and towels without harmful chemicals or dyes.1 Drinking water comes from wells on the property and is tested weekly.1 Pets are not allowed on the grounds.2
These are the hotel’s own statements, not yet checked by us. The inn is remote and geared to adults.
$$$$ indicative
What we love
- Low-emitting paints, adhesives and carpeting, and an indoor air quality plan, per the inn.1
- Well water tested weekly,1 and no pets on the grounds.2
- Houses shaped around the trees, with nothing between you and the Pacific but glass.
Worth knowing
Amenities
- Smoke-free property
- Pet-free rooms
- Filtered or tested drinking water
- Outdoor or low-chloramine pools
- Garden or organic produce
- Low-emitting materials
Map
47900 Highway 1, Big Sur, CA 93920
Our review
At a glance
- Fragrance
- 5 not yet reviewed
- Air
- 1 hotel-reported, 4 not yet reviewed
- Cleaning & care
- 4 not yet reviewed
- Sleep & materials
- 1 hotel-reported, 4 not yet reviewed
- Water & pools
- 2 hotel-reported, 2 not yet reviewed
- Food
- 1 hotel-reported, 1 not yet reviewed
- Light & quiet
- 2 not yet reviewed
- Building
- 1 hotel-reported, 2 not yet reviewed
Four reported by the hotel; the rest not yet reviewed.
4 hotel-reported21 of 25 not yet reviewed
Counts cover the 25 scored criteria; the other 5 windows are context.
Checked
Read the full profileThe ledger
Fragrance
Added scent is the most common complaint from sensitive guests, and the hardest thing to see on a booking page.
No added fragrance in rooms
Not yet reviewed.
No scent marketing
Not yet reviewed.
Fragrance-free laundry
Not yet reviewed.
Unscented bath products
Not yet reviewed.
Unscented spa options
Not yet reviewed.
Know something about fragrance here that we don’t? Tell us
Air
What you breathe for eight hours a night: smoke history, fresh air, filtration and anything burning in the room.
Smoke-free property
Hotel-reportedacross the property
The hotel says: ‘Post Ranch Inn is a non-smoking facility.’
How we know
What we look for. No smoking in any guest room, balcony or indoor space.
Why it matters. Tobacco smoke leaves a residue (thirdhand smoke) on surfaces and in dust. A study of California hotels found that non-smoking rooms in hotels that allow smoking elsewhere did not protect non-smoking guests from it.
Source: Matt et al., Tobacco Control, Thirdhand smoke and exposure in California hotels: non-smoking rooms fail to protect non-smoking hotel guests from tobacco smoke exposure ()
Source 1: Hotel website: sustainabilityUndated · read 21 Oct 2026
Opening windows
Not yet reviewed.
Filtered fresh air
Not yet reviewed.
So far, the hotel says: The inn runs an indoor air quality management plan, and ‘HEPA air filters are used in all public spaces’.
Our note. Guest-room ventilation and the filtering of outdoor air are not described, so this falls short of the criterion.
How we know
What we look for. Mechanical ventilation brings outdoor air in through filters rated MERV 13 or better.
Why it matters. Fine particles (PM2.5) are linked to respiratory and cardiovascular harm. A MERV 13 filter captures at least half of the smallest particles it is rated for and most larger ones, and a steady supply of fresh air dilutes pollutants released indoors.
Source: US EPA, What is a MERV rating? ()
Source 1: Hotel website: sustainabilityUndated · read 21 Oct 2026
In-room air purifier
Not yet reviewed.
No in-room combustion
Not yet reviewed.
Know something about air here that we don’t? Tell us
Cleaning & care
How a room is cleaned, treated and prepared, and whether a request for a gentler clean is actually honored.
Low-chemical housekeeping
Not yet reviewed.
No ozone or biocide treatments
Not yet reviewed.
Low-chemical pest control
Not yet reviewed.
Sensitive-guest preparation
Not yet reviewed.
Know something about cleaning & care here that we don’t? Tell us
Sleep & materials
The textiles, mattress and floor you spend the night closest to, and how allergen-aware the room is.
Tested or organic bed linen
Not yet reviewed.
So far, the hotel says: ‘Sheets and towels are custom-made, using no harmful chemicals or dyes.’
Our note. No certification is named, so this falls short of the criterion.
How we know
What we look for. Sheets and towels certified to a residue-testing standard such as OEKO-TEX Standard 100, or certified organic.
Why it matters. Certifications such as OEKO-TEX Standard 100 test the finished fabric, down to the thread, against a list of restricted substances, which lowers skin exposure over a night’s sleep.
Source: OEKO-TEX, OEKO-TEX Standard 100 (undated)
Source 1: Hotel website: sustainabilityUndated · read 21 Oct 2026
Mattress materials disclosed
Not yet reviewed.
Hard floors
Not yet reviewed.
So far, the hotel says: Carpeting is listed among the inn’s low-emitting materials, and radiant heat warms ‘most guestroom or bathroom floors’.
Our note. Which rooms are carpeted is not stated.
How we know
What we look for. Hard, cleanable floors in guest rooms rather than wall-to-wall carpet.
Why it matters. Dust mites live in carpet, and US health guidance for allergic sleepers is to replace wall-to-wall carpet in bedrooms with bare floors, which can be cleaned completely between guests.
Source: US National Institute of Environmental Health Sciences, Dust mites and cockroaches (undated)
Source 1: Hotel website: sustainabilityUndated · read 21 Oct 2026
Allergy-friendly rooms
Not yet reviewed.
Pet-free rooms
Hotel-reportedacross the property
The hotel says: Pets are not allowed on the grounds; trained service animals only.
How we know
What we look for. Rooms or floors where animals are never allowed, cleaned to a separate routine.
Why it matters. Pet allergen can stay on carpets and furniture for months and travels on clothing. For allergic guests a room animals never enter matters more than any amenity.
Source: US National Institute of Environmental Health Sciences, Pet allergens (undated)
Source 2: Hotel website: policies and FAQsUndated · read 21 Oct 2026
Know something about sleep & materials here that we don’t? Tell us
Water & pools
Drinking water, shower water and pool air.
Filtered or tested drinking water
Hotel-reportedacross the property
The hotel says: All water comes from seven wells on the property and is treated on site, and its ‘quality is monitored and tested weekly’.
Our note. Test results are not published.
How we know
What we look for. Drinking water filtered at the tap or refill station, or treated and tested on site, with filters or tests on a schedule.
Why it matters. Public water systems in California are regulated and monitored by the State Water Board, though older building plumbing can still affect what reaches the tap. Filtration mainly improves taste and removes chlorine, and it replaces single-use bottles; private wells need regular testing.
Source: California State Water Resources Control Board, Division of Drinking Water (undated)
Source 1: Hotel website: sustainabilityUndated · read 21 Oct 2026
Water safety plan
Not yet reviewed.
Shower filters
Not yet reviewed.
Shown for information; not scored.
Outdoor or low-chloramine pools
Hotel-reportedacross the property
The hotel says: The infinity pools are heated and outdoors.
Shown for information; not scored.
How we know
What we look for. Pools are outdoors, or indoor pools have dedicated ventilation and monitored combined chlorine.
Why it matters. Chloramines irritate the skin, eyes and airways, and they build up in the air of indoor pools without enough ventilation. Outdoor pools, and good ventilation for indoor ones, keep levels low.
Source: US CDC, Chloramines and pool operation ()
Source 3: Hotel website: home pageUndated · read 21 Oct 2026
Context, not scored: almost every pool in this catalog is outdoors, so it says little about one hotel against another.
Know something about water & pools here that we don’t? Tell us
Food
Allergen care first; where the produce comes from second.
Allergen-aware kitchen
Not yet reviewed.
Garden or organic produce
Hotel-reportedacross the property
The hotel says: An on-site chefs’ garden supplies the restaurant, which favors ‘organic, seasonal vegetables and fruit whenever possible’.
Shown for information; not scored.
How we know
What we look for. A meaningful share of the kitchen’s produce is grown on site or certified organic.
Why it matters. A large review found detectable pesticide residues about four times as often in conventional crops as in organic ones. Over a short stay the difference in exposure is small, so we show this as a note on the kitchen, not a scored health factor.
Source: Barański et al., British Journal of Nutrition, Higher antioxidant and lower cadmium concentrations and lower incidence of pesticide residues in organically grown crops: a systematic literature review and meta-analyses ()
Source 1: Hotel website: sustainabilityUndated · read 21 Oct 2026
Kitchen note, not scored.
Know something about food here that we don’t? Tell us
Light & quiet
Darkness and silence at night, and radio-quiet options for guests who want them.
Darkness and quiet
Not yet reviewed.
Radio-quiet options
Not yet reviewed.
Shown for information; not scored.
Know something about light & quiet here that we don’t? Tell us
Building
The materials a hotel was built and renovated with, how it handles damp, and what third parties have certified.
Low-emitting materials
Hotel-reportedacross the property
The hotel says: ‘Post Ranch uses low-emitting adhesives, paints, coatings, carpeting, and other materials’, in line with California indoor air quality standards.
How we know
What we look for. Low-VOC paints, adhesives, finishes and flooring specified in construction or renovation.
Why it matters. Paints, varnishes and adhesives release volatile organic compounds, formaldehyde among them, most heavily when new. Low-emitting products reduce that load.
Source: US EPA, Volatile organic compounds’ impact on indoor air quality ()
Source 1: Hotel website: sustainabilityUndated · read 21 Oct 2026
Leak and mold response
Not yet reviewed.
Building certification
Not yet reviewed.
Shown for information; not scored.
Know something about building here that we don’t? Tell us
Notes & sources
- Hotel website: sustainability, Undated · read 21 Oct 2026
- Hotel website: policies and FAQs, Undated · read 21 Oct 2026
- Hotel website: home page, Undated · read 21 Oct 2026
Room count: Sources give 39 or 40 rooms and houses; not stated on the inn’s site. Hotel website (opens the hotel’s website)
Photographs: Alec Favale (Unsplash License, placeholder image, not the hotel); Christopher Stites (Unsplash License, placeholder image, not the hotel); Maverick Frame (Unsplash License, placeholder image, not the hotel); Declan Sun (Unsplash License, placeholder image, not the hotel)
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