Although there are differing opinions, survival shelters can be divided into three basic types: primitive shelters (also sometimes referred to as natural shelters); temporary shelters; and permanent shelters. Having a shelter, being able to construct a shelter, or being able to locate shelter for you and your family is going to be essential to your family’s survival.

Primitive shelters are generally considered to be shelters that you construct from the materials (e.g., branches, leaves, rocks) around you.  Sometimes their construction is supplemented with materials that you might be carrying with you (e.g., garbage bags, cord) but they primarily consist of materials that you locate in the area where you find yourself. 

Temporary shelters are “man-made” shelters, and a type of shelter that most of us have used numerous times and are quite familiar with.  These temporary shelters are usually divided into two main groups: tent shelters and semi-permanent shelters.

Semi-permanent shelters are also temporary shelters but are larger, much more durable, and far more comfortable to live in than a tent.  However, semi-permanent shelters also weigh a lot more, come in multiple pieces, and take much longer to put together and disassemble.  These shelters are designed to be used when a person or family will be staying in the same place for at least several months.  The time to locate the spot where you intend to place the semi-permanent shelter and actually assemble it is before the disaster or crisis actually happens. 

Permanent shelters, just as the name implies, are designed and built for permanence and are constructed to stay in one place (i.e., not be moved).  The best example of a permanent shelter is the house or apartment where we live.   However, any stationary building will normally qualify as a permanent shelter.

Safety from A-tomic, B-iological and C-hemical weapons, shelter manufacturer based in Germany. 
Deep Earth Preparedness and Survival Shelter. Prices on application. Site has interior pics, and pics showing how happy customers installed it.
Modular bunkers made from prefabricated concrete, starting at 8 feet thick. 
A true steel reinforced concrete underground bomb shelter. They supply most of the parts, you construct it. 
Concrete Canvas Shelters are rapidly deployable hardened shelters that require only water and air for construction. The 16m2 variant can be deployed by 2 people without any training in under 40 minutes and is ready to use in only 12 hours. 

2012 Shelters

The people behind 2012 Shelters are dedicated to helping people, not only survive, but thrive during hard times, whether it be a storm that knocks out power or the events of 2012. We are highly trained in Construction, Construction Management and the fields of field fortifications, security, ballistic designs and catastrophic event preparation and post event recovery. 

Have everything all made in USA. Metal or fiberglass. Units can hold up to 100 people. 
All underground homes are ultra-custom arch / engineered and specifically designed to be fully self-staining., as in self supportive ( off the grid 100% ) capable of keeping all inside safe for up to one years time / duration or more depending on actual overall design specifications. More when food supplies are replenished.
Tornado-proof, hurricane-proof, earthquake-proof - for anyone wanting to avoid the whole bunker thing, but still be a bit safer. 
Passive Solar, Energy Efficient, Disaster Resistant, Earth Sheltered Underground Homes. 
Earth Sheltering is an eco-friendly type of housing that offers a small level of bunker-type protection.

Storm shelters, fallout shelters and safe rooms.
Promotes human safety, property protection and economic well-being by strengthening homes and safeguarding families from natural and man-made disasters.

One of the many providers of shelters in Australia. Designed for bush fires only, but might be useful for other short-term events. 
Plan and build vacation homes that double as retreats for when times are hard, or nature attacks.
Engineering Design/Build Management for Hardened Structures, Fortified Homes and Bomb Shelters since 1995. Global Warming Designs, Chemical, Biological, Radiological and Explosive (CBRE) Protection Systems. 
This particular system starts out with a used fuel tank. A 10,000 gallon steel fuel tank is eight feet wide and about twenty four feet long. These used steel tanks can be purchased for any where from $250 to $1000. 
These are easy to make and can protect electronic equipment against EMP from a nuclear explosion or a Coronal Mass Ejection (CME)
Hycrete delivers integral waterproofing that can eliminate any need for external membranes, coatings and sheeting treatments. Mentioned in TIME magazine

Licensed distributors of the Hardened Structures Global Network, providing bunkers for New Zealanders. 

 Monolithic Dome Institute

Lots of information on above-ground domes, and how safe they can be in a disaster.   
The first part of this book covers the threats that might cause you to desire a shelter. The author emphasizes the nuclear threat, but also touches on earth changes. The main section covers shelters in detail: radiation shielding, air supply considerations, power systems, cooking options. lighting, food & water, communications, EMP shielding, security, psychological considerations, and even addresses community issues regarding shelters. 
Custom made shelters and bunker, ask for a quote. USA and Canada. 
Nuclear war, accidents, terrorism and radioactive fallout are all much more survivable when you know exactly what you are up against and how to properly defend yourself and your family from its effects. It not only can be done, but even with very limited resources you can raise your families odds of surviving 100 fold simply by reading, learning and applying what's presented here. 
100% American designed & installed. Similar technology used by Mission Critical shelters. As used by NORAD. 
Made from structural fiberglass, these shelters are not permanent structures with concrete foundations, hence there is no need for building permits. 
In ground storm shelters that double as safe room/panic room, 1,000+ year life span, bullet resistant door option, double wall polymer construction. 
Above and below ground, steel or concrete. Designed for tornadoes, but also useful as a cheaper bunker option for preppers. 
Shelters, Chem/Bio Filters & Blast Doors. Member of the American Civil Defense Association. 
Futuristic Shelter Technology available.