Garden Office in Knaphill, SurreyGarden Office in Knaphill, Surrey

20′ x 10′ Office in 16mm Shiplap with 6′ x 4′ Entrance Alcove

Shell Building£6000.00
Grey Felt Tiles£1400.00
Guttering Pack£400.00
Superior Exterior Finish£1400.00
Insulation & Lining£1200.00
Doors & Windows£1680.00
Entrance Alcove£360.00
Concrete Pads£2000.00

Having left home to go to University, Mark and Jacks parents took the opportunity to make use of their bedrooms by turning them into a Study and Gym.

Having realised there was now nowhere for them to sleep when they come home, they visited the Phoenix timber Buildings site for inspiration for a Granny Annex for teenagers!

They decided on a two-bedroom Annex with a living area and bathroom. The boys used the kitchen in the main house for their meals……





The Phoenix Timber Building Garden Room is initially priced as a SHELL BUILDING that can then be upgraded to your own specification. Each adjustment will be costed individually so that you know exactly where your money is going.

As a bespoke alternative to the classic summer house and log cabin, our Garden Buildings can be used all year round.


WHAT WILL YOU USE YOUR BUILDING FOR?                      


This will determine the specification you require, and the size and cladding type will ascertain the Shell Building Price. From here, we can steer you in the right direction to achieve the best building for your requirements at the best price.





You will have a choice of roof shape, covering and the colour of your guttering.  Next you can choose from selection of 5-year colour treatments for your building or if you prefer, then you can supply your own. We have a wide choice of doors and windows for you to choose from but again, if you wish, you can supply your own. Once you’ve decided on any internal walls you may need, we can help you decide on the appropriate insulation, lining and even plastering for your project. We can also provide you with any necessary lighting and electric sockets. That fabulous veranda you’ve always wanted can also be added and of course we can supply the appropriate base required.


Our Garden Room SHELL consists of the following:


The roof is covered with 38kg Green Mineral Felt providing weather protection for at least 5 years. It is gutter ready with a flat fascia and a drip rail.


The walls are 7’2” high with 3” x 2” framing and with a breathable membrane. Openings will be made for your door and window requirements.


The insulated 18mm OSB floor is sealed with a damp proof membrane and the outside of the building is treated with Phoenix Oak finish which is guaranteed for one year. All outside joins will have cover strips.


Delivery, construction and VAT are included in the quoted price.





Phoenix Timber Buildings has over 25 years’ experience making bespoke outside buildings and offers a unique building concept.

Every customer starts with a SHELL that can be changed and enhanced to create your perfect building. Unlike other buildings that are on offer you don’t have to compromise on what the manufacturer has already decided is ideal.

Everything is made in our own workshop by our experienced craftsman.

If you want windows around three walls, then we can do that. If you want double doors at both ends of your garage, we can do that too. You tell us what you want and if it is achievable, we will produce it!