RESIDENTIAL SPA
CASE STUDY · ESTATE WELLNESS ANNEX
RESIDENTIAL SPA
CASE STUDY · ESTATE WELLNESS ANNEX
A 656 square-foot annex — previously a pool house divided between a poker room and sleeping quarters — with the potential for something entirely different. The client's mandate was unambiguous: gut it and rebuild it as a fully private residential spa. Sauna, steam shower, cold plunge bath, massage room, glam vanity. An ambitious program for a constrained footprint.
Inherited from a previous design firm, the floor plan carried unresolved aesthetic tension from the start. Two structural challenges demanded immediate solutions: an HVAC bulkhead near the stairwell that needed to be concealed without losing access, and — critically — too much natural light. A spa demands shadow. This one had windows everywhere.
DESIGN DIRECTION
PROJECT: RESIDENTIAL SPA
DRAPERIES - MASSAGE ROOM
Kravet
Madison Velvet Rosewood
OTTOMAN PILLOWS
Donghia
River Stone Earth
BENCH PILLOWS
Kravet
Highs & Lows Anthracite
BENCH CUSHION
Designers Guild
Ampara Pearl
BENCH PILLOWS
Mark Alexander
Veranda Panama Gunmetal
DEMILUNE OTTOMAN
Chivasso
Soft Touch CH3039/094
WALLPAPER
Phillip Jeffries
Belgian Linen Dusty Brown
SWIVEL CHAIRS • ENTRY
CB2
Gwyneth Ivory Boucle
SCONCES • ACCENT WALL
Arteriors
Stefan Sconce
PENDANTS • COMMON AREA
Visual Comfort
Brummel Grande
SCONCES • MASSAGE ROOM
Corbett
Celestial Sconce
MIRRORS • GLAM VANITY AREA
Arteriors
Kris Mirror
CEILING PAINT
Benjamin Moore
White Dove
WALL PAINT
Benjamin Moore
White Sand
FLOORING
Ergon
Cornerstone Slate White
CABINETRY & PANELS
Rift Sawn White Oak
Veneer
COUNTERTOPS
COLD PLUNGE SURROUND & WALLS
Taj Mahal Quartzite
VANITY CABINETRY
Benjamin Moore
Midsummer Night
EXISTING CONDITIONS
PROJECT: RESIDENTIAL SPA
THE STARTING POINT
A 656 sq ft pool house divided between a poker room and sleeping quarters — inherited from a previous design firm with an unresolved floor plan and no spa program. The mandate was a complete gut-rehab from the studs out.
CONSTRAINTS DOCUMENTED
On-site measurement and photography captured the HVAC bulkhead position, window placements, and structural limitations that would define every layout decision. All constraints were modeled in SketchUp before a single wall was framed.
WHAT THE SHELL MADE POSSIBLE
Stripping the space to its bones allowed the full wellness program — sauna, steam, cold plunge, massage room, glam vanity — to be distributed across the footprint without compromise. The blank shell was the brief, realized.
DESIGN PROCESS
PROJECT: RESIDENTIAL SPA
01
FIELD MEASURE
On-site assessment post-demo. Full 3D model built; DWGs issued to GC against inherited constraints.
03
LIGHT CONTROL
Four distinct window solutions devised by zone — switchable film, drapery, gliding oak panels, and decorative casing.
05
VISUALIZATION
V-Ray renders with IES vendor files. STL file issued for CNC stairway accent wall. Lighting tested under all conditions.
02
CONCEPT DIRECTION
Client's Midjourney AI images analyzed as mood board. Aesthetic translated into a feasible, personalized design scheme.
04
PIVOTS
Mid-project shade selections revised; finishes refined. All changes absorbed in model before reaching contractor.
DESIGN DEVELOPMENT • WINDOWS & LIGHT CONTROL
PROJECT: RESIDENTIAL SPA
The vanity area presented a unique design challenge: how to achieve a continuous wall surface for privacy and light-blocking, while still allowing easy access to the natural light of the window behind. The solution: sliding wood fluted panels engineered with the contractor to retract behind the mirror, fully opening the wall when daylight is wanted and disappearing when it isn't.
DESIGN DEVELOPMENT • WINDOWS & LIGHT CONTROL
PROJECT: RESIDENTIAL SPA
A mid-project switch from outside mount Roman shades to full blackout inside mount roller shades introduced an immediate problem: the depth for an inside mount required one more inch than the existing casing offered. With decorative millwork already planned throughout the space, the solution was to build out the wall depth at each window — concealing the hardware completely and turning a technical constraint into a design feature. The detail was sketched on site with the GC, modeled in SketchUp, and approved before anything was built.
LIGHTING & VISUALIZATION
PROJECT: RESIDENTIAL SPA
LIGHTING VISUALIZATION
The client needed to see how selected finishes, fabrics, and paint would read under both artificial light and natural daylight before committing. IES photometric files sourced directly from fixture vendors were loaded into the V-Ray model, allowing the massage room to be rendered under multiple real-world lighting scenarios. Each condition was exported as a separate deliverable for side-by-side client review.
RENDERING ENGINE — V-Ray for SketchUp
LIGHTING DATA — IES Files · Vendor-Supplied Photometric Data
CONDITIONS TESTED — Ambient Low · Accent Up · Full Scene · Daylight
OUTPUT — Client Review Renders · Finish Comparison Sheets
LIGHTING & VISUALIZATION
PROJECT: RESIDENTIAL SPA
V-RAY TEXTURE MAPPING
PLASTER WALLS RENDERED WITH MULTIPLE BUMP & DISPLACEMENT MAPS
Various texture maps were applied to the proposed plaster shower walls in V-Ray, then rendered under both natural daylight and artificial conditions. The STL file for the stairway CNC accent wall was exported directly from SketchUp and fabricated by the contractor.
KEY RESULTS
PROJECT: RESIDENTIAL SPA
Full transformation — poker room and bunkhouse to private spa with sauna, steam shower, cold plunge, massage room, and glam vanity.
Zoned light control — four distinct solutions by zone, each resolved in the 3D model before contractor involvement.
AI-assisted concepting — client Midjourney references translated into a buildable, fully specified design scheme.
3D model as team language — single source of truth for designer, GC, and client through a shifting brief and multiple mid-project pivots.
Role
Junior Designer · 3D Modeler · Project Manager
Tools
SketchUp · LayOut · V-Ray · AI
Scope
Sauna · Steam · Cold Plunge · Massage · Vanity
Light Control
Switchable Film · Fluted Panels · Drapery · Roller Shades
Team
Lead Designer · GC · Client
Output
3D Model · DWGs · Material Drawings · STL Files · V-Ray Renders