Standard on Premium
White wash redwood
Walls & ceilings clad in white wash redwood.
Garden rooms · Signature collection
Sandringham
Spacious elegance inspired by classic estate design. First shown at the RHS Chelsea Flower Show and handmade in Oxfordshire, the Sandringham is built closer to a home than a typical garden building.
From £32,700
Premium package, 3.5m × 3.5m. Platinum from £38,900. Every price includes delivery, installation by our own team and the full standard specification.
Your visit request arrives with "Sandringham" already filled in.
- Sizes
- 4m × 3m – 10m × 5m
- Packages
- Premium or Platinum
- Construction
- SIPs or timber stud
- Guarantee
- 10 years
Finance available on our 10-Year Plan and Buy Now, Pay Later. See the representative example
Specification
Built to be lived in
Closer to residential construction than a typical garden building, with the specification others charge extra for included as standard.
Construction
Structurally engineered SIPs or a traditional timber stud frame, designed by architects and engineers and built to Timber Development UK (previously TRADA) standards.
Insulation
High-performance insulation: from 150mm up to 280mm combined wall, roof & floor build-up, for year-round use.
Triple glazing
Dark grey aluminium doors and windows, triple glazed as standard, with black handles.
Smart air conditioning
Monobloc smart air conditioning: cooling, heating and dehumidifying. Platinum can have an Adax NEO panel heater instead.
Electrics & lighting
Recessed LED spotlights, switches and double sockets, all pre-wired. Platinum adds an external consumer unit and dimmer switching.
Flooring
SPC flooring made for heavy footfall on Premium; engineered oak, matt lacquered, on Platinum.
Roof
Single-piece EPDM rubber roof, supplied in one piece to eliminate the risk of leaks.
Cladding
Redwood 18 × 95mm on Premium, Thermowood 20 × 118mm on Platinum, both treated with Sikkens 771 with UV filters.
Two complete specifications, both installed and ready to tailor. Platinum adds an engineered oak floor, painted plasterboard walls, Thermowood cladding and upgraded electrics and insulation.
| PremiumFrom £32,700 | PlatinumFrom £38,900 | |
|---|---|---|
| Doors | One set of dark grey aluminium doors, triple glazed, black handles. French doors 2m × 2m up to 4m wide; 3 bi-folds at 4.5–7m; 4 at 7.5–8.5m; 5 at 9–10m | One set of dark grey aluminium doors, triple glazed, black handles. French doors 2m × 2m up to 4m wide; 3 bi-folds at 4.5–7m; 4 at 7.5–8.5m; 5 at 9–10m |
| Flooring | SPC (stone plastic composite), made for heavy footfall. Ash Grey, Walnut Brown or Graphite Grey | Engineered oak, matt lacquered. Light Grey, Walnut or Natural Oak |
| Internal walls | White wash redwood cladding | Painted plasterboard, Dulux white |
| External cladding | Redwood 18 × 95mm, treated with Sikkens 771 with UV filters | Thermowood 20 × 118mm tongue & groove, Sikkens 771 with UV filters |
| Electrics | Internal consumer unit, 1-gang switch, white fittings | External weatherproof consumer unit, 1-gang dimmer switch, brushed stainless fittings |
| Lighting & sockets | Recessed LED ceiling spotlights. Double sockets: 2 up to 20m², 3 up to 30m², 4 above | Recessed LED ceiling spotlights. Double sockets: 2 up to 20m², 3 up to 30m², 4 above |
| Heating & cooling | Smart air conditioning | Smart air conditioning, or an Adax NEO wall panel heater |
| Insulation (timber frame) | Floor: Thinsulate foil. Ceiling: 100mm Rockwool. Walls: 75mm Rockwool | Floor: 90mm foil-backed Celotex. Ceiling: 100mm Rockwool. Walls: 100mm Rockwool |
| Insulation (SIPs) | PUR: roof 122–197mm, walls 97–147mm, floor 97–172mm | PUR: roof 122–197mm, walls 97–147mm, floor 97–172mm |
| Price a Premium room | Price a Platinum room |
Both packages include delivery, installation by our own team, the full standard specification and our 10-year guarantee. Groundworks (a concrete base or ground screws) are not included and are quoted separately.
Triple glazing
As standard, for warmth and quiet all year.
Smart air conditioning
Cooling, heating and dehumidifying.
Aluminium doors & windows
Dark grey, triple glazed, black handles.
High-performance insulation
150–280mm wall, roof & floor build-up.
Full electrics & lighting
LED spotlights, switches and sockets, pre-wired.
10-year guarantee
Timber rot, decay & structural integrity.
Internal walls & ceilings
Four finishes at no extra cost. Painted plasterboard is Platinum only.
- White wash redwood
Painted plasterboard
Maple acoustic
Teak acoustic
External cladding
Premium: redwood 18 × 95mm. Platinum: Thermowood 20 × 118mm tongue & groove. Both treated with Sikkens 771 (light Omnia oak) with UV filters. Colour options: TBC
Flooring
Premium: SPC flooring in Ash Grey, Walnut Brown or Graphite Grey. Platinum: engineered oak, matt lacquered, in Light Grey, Walnut or Natural Oak. Swatch photos: TBC
Options & upgrades
Choose your interior finish
Personalise your walls and ceilings at no extra cost. Your package sets the standard finish.
Platinum only
Plasterboard, painted white
Walls & ceilings in plasterboard, painted white.
Free upgrade
Acoustic panelling: maple veneer
Walls & ceilings in maple-veneer acoustic panelling, or panelled walls with white melamine ceilings.
Free upgrade
Acoustic panelling: teak veneer
Walls & ceilings in teak-veneer acoustic panelling, or panelled walls with white melamine ceilings.
Doors, roof and skylights
One set of dark grey aluminium doors is included, chosen to suit the width. French, sliding or bi-fold doors in another arrangement, a pitched cedar roof and skylights can all be tailored, priced by your designer.
Bespoke and Building Regulations
Other sizes are available through our bespoke service. The room can be specified to meet Building Regulations and adapted into an annexe.
Sizes & prices
Find your size
From 4m × 3m up to 10m × 5m, in half-metre steps. Choose a package, width and depth to see the price.
Package
Width
Depth
Selected3.5m × 3.5m12.25m² floor area
Price · Premium£32,700includes delivery, installation & the package specification
Platinum at this size: £38,900
Standard doors French doors 2m × 2m
3D configurator
Design your Sandringham in 3D
Customise the dimensions, materials and finishes, and watch your garden room take shape as you go. Save and share your design with our team.
What's included
Clear about what you're paying for
Sandringham
From £32,700
Every price includes the building, your chosen package, delivery and installation by our in-house team.
- Premium from £32,700
- SPC floor, white wash redwood walls, redwood cladding.
- Platinum from £38,900
- Engineered oak floor, painted plasterboard, Thermowood cladding.
Finance. 10-Year Plan (8.9% APR representative) or Buy Now, Pay Later (9.9% APR): 20% deposit, loans from £1,000 to £50,000. Subject to status.
What's included, and what's extra
- Included
Your packagePremium or Platinum specification, with triple glazing, smart air conditioning, full electrics and our 10-year guarantee.
- Included
DoorsOne set of dark grey aluminium doors, chosen to suit the width: French doors up to 4m wide, then 3, 4 or 5 bi-folds.
- Included
Delivery & installationBy our own specialist installation teams, with minimal disruption.
- Quoted separately
FoundationsA concrete base or ground screws, quoted separately after a site survey.
- Optional
Tailored itemsA different door style, a pitched cedar roof or skylights, priced by your designer.
Representative example: 10-Year Plan
Credit is subject to status, age and affordability. Minimum spend and terms & conditions apply. Crown Pavilions Limited is a credit broker, not the lender. Other finance options are available.
- Cash price
- £32,700.00
- Deposit (20%)
- £6,540.00
- Amount of credit
- £26,160.00
- Duration of agreement
- 120 months
- Interest rate (fixed p.a.)
- 4.91%
- Representative APR
- 8.9%
- 120 monthly payments of
- £325.00
- Total amount payable
- £45,540.00
Uses
One room, many lives
Designed for multi-use: office, gym, studio or entertaining space.
Entertaining
A bar, cinema or games room at the end of the garden.
Sold for non-habitable use. It can be specified to meet Building Regulations and adapted into an annexe.
Compare
How the Sandringham compares
All five share the same included-as-standard specification. The Signature rooms add larger sizes and a choice of two packages.
 |  |  You are viewing |  |  | |
|---|---|---|---|---|---|
| Sizes | 3m × 3m to 7.5m × 4m | 3m × 3m to 6m × 4.5m | 4m × 3m to 10m × 5m | 4m × 3m to 10m × 5m | 5.5m × 3m to 10m × 5.5m |
| Roof | Flat, single-piece EPDM | Flat or optional pitched | Flat EPDM, or tailored pitched cedarPitched: priced by your designer | Flat EPDM, or tailored pitched cedarPitched: priced by your designer | Flat EPDM, or tailored pitched cedarPitched: priced by your designer |
| Construction | Traditional timber stud | Traditional timber stud | SIPs or traditional timber stud | SIPs or traditional timber stud | SIPs or traditional timber stud |
| Packages | One specification | One specification | Premium or Platinum | Premium or Platinum | Premium or Platinum |
| Character | Clean, contemporary lines | More light, more headroom | Spacious elegance; launched at the RHS Chelsea Flower Show | Slate-tile feature front wall | Our flagship, with a covered outdoor seating area |
Standard on all: triple glazing · smart air conditioning · aluminium doors & windows · full electrical package · 150–280mm insulation · 10-year guarantee
Your project
Will it fit, and do I need planning?
Our design consultants will help with both, with no pressure and no hurry.
Will it fit?
A consultation, your way
Talk through size, package, position and access with a design consultant. We can prepare a scaled drawing of your garden with your Sandringham in place.
A site survey before installation confirms the right base for your garden.
Planning guidance
Designed for permitted development
The Sandringham is designed to comply with permitted development in most cases. As a guide:
- Up to 2.5m high if within 2m of a boundary. Sandringham overall height: TBC
- Not in front of the house, and no more than half the garden built on
- Not for sleeping or living in without planning permission
- Flats, listed buildings and designated land have extra rules
Guidance only. Check the Planning Portal or your local planning authority before you build.
Real installs
Sandringham garden rooms in real gardens
See how other owners have sized, finished and used theirs.
A bar on the deck
A wide Sandringham opening onto composite decking, with a bar and outdoor dining.
Size · county: TBC
A studio in the trees
Doors folded back to a quiet studio space, beside a planted rockery.
Size · county: TBC
Lounging on the deck
A long Sandringham with a wide deck and loungers, set against a garden wall.
Size · county: TBC
Stunning bespoke Sandringham garden room
“Crown constructed a bespoke Sandringham garden room for us, to house a gym and sound proofed rehearsal studio. They are an absolutely brilliant company who provided a first class service from the first to the last engagement. The garden room is absolutely stunning.”
Feb 2026
Choosing the right provider
“Choosing the right provider for our garden room took some time, but opting for the Crown Sandringham turned out to be an excellent decision! We're thrilled with it; it has truly transformed our space. The entire Crown team was outstanding throughout the entire process.”
Jan 2026
Would definitely recommend
“Quick, friendly, informative, and cleaned up after them. The installation was excellent, and the service from the original point of contact in the office was all very professional.”
Nov 2025
FAQs
Sandringham questions
Can't find what you need? Call 01491 612820.
What sizes does the Sandringham come in?
From 4m × 3m up to 10m × 5m in half-metre steps, giving 12–50m² of floor space. Other dimensions are available through our bespoke service.
Which doors are included?
One set of dark grey, triple-glazed aluminium doors, set by the width: French doors 2m × 2m up to 4m wide; 3 bi-folds at 4.5–7m; 4 at 7.5–8.5m; 5 at 9–10m.
Premium or Platinum: what is the difference?
Both are complete and installed. Platinum (from £38,900) adds an engineered oak floor, painted plasterboard walls, Thermowood cladding, an external consumer unit, dimmer switching, brushed stainless fittings and upgraded insulation in timber-frame builds.
Will I need a base?
Yes: a concrete base or ground screws. Groundworks are not included in the price; we carry out a site survey to find the right base for your garden and quote it separately.
Do I need planning permission?
In most cases, no. The Sandringham is designed to comply with permitted development. Sleeping or living in it needs planning permission.
Is installation included?
Yes. Delivery and installation by our own specialist teams are included in both packages.
Can I change the interior finish?
Yes, at no extra cost. White wash redwood is standard on Premium and painted plasterboard on Platinum; maple or teak acoustic panelling is available on either. An all-white-melamine finish is not offered.
Can I tailor the doors or roof?
Yes. French, sliding or bi-fold doors in a different arrangement, a pitched cedar roof and skylights can all be tailored. Your designer prices them with you.
Brochure & visits
See the Sandringham for yourself
One short form. Ask for a brochure, book a show-site visit, or arrange a design consultation at home or by video.
- Digital or printed garden rooms brochure
- Show-site visit with a named consultant
- Design consultation and scaled garden drawing
- No obligation, and no chasing
Prefer to talk? Call 01491 612820