Nordhaus is a storefront theme for furniture, lighting, textiles and home decor stores and for home marketplaces with maker shops, on CS-Cart and Multi-Vendor.
Four styles repaint the room itself: Linen (warm plaster and moss), Walnut (dark walnut in a framed mat), Fjord (cool grey-blue and pine) and Terrazzo (blush room with coral and pistachio).
Four styles, one theme
Each style changes the ground, bands, type weight and card treatment, not only the accent colour. Open any of them in the live demo.
Room scenes with a room total and one button for the whole room
Every product shown at scale on the same floor line
Texture swatches, material library and sample box link
Lead time and delivery window on cards and product pages
Will-it-fit drawings and a doorway check against returns
Sale ribbon and countdowns only for real promotion end dates
Text contrast of at least 4.5:1 in every style
How it works
Install the package in Add-ons: it adds the Nordhaus theme without touching your storefront. Activate Nordhaus in Website, Themes and pick a style. The next admin page adds the demo catalogue, so every homepage section is filled at once; replace it step by step.
Rooms are top-level categories. Materials, dimensions and lead times are product features. Room scenes, ribbons and sections are Block Manager blocks.
Features
Room bar with mega panels: product types, a room tile and the room's bestseller
Shoppable room scenes in tabs with numbered hotspots, In this room, room total and Add the room to bag
Built-in room illustrations in the colours of each style, or your own room photo
4:3 wall-and-floor wells for every product image
Cards with material and dimensions, texture swatches, lead time, from price and monthly price
Shop by room tiles, finds under a price, shop by style chips and a material library with samples
Spotlight with dimension lines and a services band
Horizontal filter bar with dropdown panels and a Seen in a room tile on category pages
Product page with texture tiles for fabrics and finishes, delivery window and a will-it-fit check
Multi-Vendor: maker shop line on cards
Cart side panel, sticky header, floating tab bar and sticky buy bar on phones
Installs with full demo content: every section and demo products are ready after activation
Four styles: Linen, Walnut, Fjord and Terrazzo
Child of Responsive: add-on hooks keep working
CS-Cart and Multi-Vendor 4.17.2 to 4.21.x
What you get
Package
kv_theme_nordhaus-1.0.0.zip: the theme and its wrapper add-on, installed through Add-ons → Manage add-ons. Activate it in Website → Themes and pick a style.
Editions
CS-Cart, CS-Cart Ultimate, Multi-Vendor and Multi-Vendor Ultimate 4.17.2 – 4.21.x, one package. A child theme of Responsive: no core files are changed and add-on templates keep working.
Updates & support
12 months included. Updates keep the theme files you changed; your layouts are never replaced.
License
1 production installation; subdomains, staging, dev and localhost are free. The theme checks its license for your domain once a day from the admin panel. Without a valid license the storefront shows the standard Responsive look instead of the Nordhaus design; cart, checkout and orders keep working. How licensing works
Compatibility
We list only the builds we install and test on. “Tested” means the full test plan was run on that build; “Supported” means the build is inside the supported range and uses the same hooks.
CS-Cart version and edition compatibility
CS-Cart version
CS-Cart
CS-Cart Ultimate
Multi-Vendor
Multi-Vendor Ultimate
4.22 and later
Testing next
Testing next
Testing next
Testing next
4.21.2
Supported
Supported
Tested
Supported
4.20.x
Supported
Supported
Supported
Supported
4.19.x
Supported
Supported
Supported
Supported
4.18.x
Supported
Supported
Supported
Supported
4.17.2
Tested
Supported
Supported
Supported
Before 4.17.2
Not supported
Not supported
Not supported
Not supported
Last tested build: Multi-Vendor 4.21.2, Oct 18, 2026Tested on: CS-Cart 4.17.2, Multi-Vendor 4.21.2
Requirements
Platform
CS-Cart, CS-Cart Ultimate, Multi-Vendor or Multi-Vendor Ultimate 4.17.2 – 4.21.x
Requirement
Administrator access to the admin panel
Core changes
None. Hooks and template overrides only
1.0.0
Oct 18, 2026
Latest
Added 5
Nordhaus theme for CS-Cart and Multi-Vendor 4.17.2 - 4.21.x: a home and furniture store theme with rooms as the main navigation (room bar with mega panels: product types, a room tile and the room's bestseller), a sale ribbon with a real countdown, shoppable room scenes in tabs (numbered hotspots, In this room, room total and Add the room to bag; built-in illustrations in the colours of each style or your own room image), shop by room tiles, bestseller tabs, finds under a price, shop by style, a material library with free samples, a spotlight with dimension lines, a services band and the journal.
Product cards on 4:3 wall-and-floor wells with material and dimensions, texture swatches, lead time, "from" price, monthly price and a round add-to-bag button; category pages with product types as mini rooms, a horizontal filter bar and a Seen in a room tile.
Product page with texture tiles for fabric and finish options (the gallery follows the material), size and assembly options, lead time with a delivery window, delivery facts and Will it fit? (front and side drawings, all dimensions, doorway check).
Four styles: Linen, Walnut, Fjord and Terrazzo. DM Serif Display and DM Sans (SIL Open Font License, self-hosted).
Complete demo content (Ostra Living: seven rooms plus Lighting, Textiles and Decor, 43 products with materials, dimensions, lead times and styles, two promotions, journal posts, maker shops on Multi-Vendor) installed on activation.
Tested on CS-Cart 4.17.2, Multi-Vendor 4.21.2. First release.
Does Nordhaus work with my add-ons?
Yes. Nordhaus is a child of the standard Responsive theme and does not override product, cart or checkout templates, so add-on hooks keep working. Kavio Labs add-ons are styled to match each style.
Does it work on CS-Cart and on Multi-Vendor?
Yes, one package for both. On Multi-Vendor the cards show the maker shop that sells the piece.
My product photos have a white background. Will they look right?
The wall-and-floor wells are made for cut-out images on a transparent background. For photos on white, turn off Wall-and-floor product wells: the wells become plain light panels and the photos blend into them.
Why does a card show no swatches?
Swatches come from the variants of the MATERIAL feature that have an image. Add a texture image to each material variant (Products → Features → Material → variants) and assign the materials to the product.
Why is there no "Will it fit?" section?
It needs the features WIDTH_CM and HEIGHT_CM on the product (and DEPTH_CM for the side view). It can also be turned off in the theme settings.
How do I place the hotspots on my own room photo?
Choose My own image in the room block and paste the image URL. Then set Hotspot positions: one x,y pair per product in the order of the products, in % of the image (left and top). Open the image in any editor, read the pixel position of each piece and divide by the image width and height.
What does "Add the room to bag" add?
One of each product of the room block. Select options go in with their first variant; shoppers change fabric or size in the bag or on the product page.
Why does a product show no countdown?
Countdowns only appear for catalog promotions with an end date. Nordhaus never shows invented timers.
Can I change or turn off the monthly price line?
Yes: Monthly price line in the theme settings (6 to 36 months, or Off). It divides the displayed price by the number of months; offer a matching financing payment method before you show it.
What happens without a licence?
A new installation works for 14 days. After that, without a valid licence, the storefront shows the standard Responsive look; cart, checkout and orders keep working and visitors see no message. The admin panel tells you why and how to fix it. See Configuration.
Does the theme work on my staging copy?
Yes. Subdomains of your licensed domain and local development hosts are covered by the same licence.
What happens if your licence server is down?
Nothing visible: the theme keeps the last verified result and keeps working for 14 days while it retries.
Will an update overwrite my changes?
No. Files you changed are kept (a notice lists them), and layouts and blocks are never replaced.
A Swiss-editorial storefront theme with a shop-window homepage, oversized type and four bold styles, built on Responsive so every add-on keeps working.
A department-store theme for large catalogues: colour-coded departments, a department list beside the hero, tabbed product blocks and a sticky buy box.