Principia Design

Bryanston
•
Architects, Digital marketing and SEO services, Doors, Web design
10+
Years on the market
5.0

About: Principia Design is an architectural and interior design company based in Randburg, Johannesburg. We specialize in creating beautiful, functional spaces that reflect our client's unique style and personality. Whether you're looking to renovate your home or office, or build a new space from scratch, we can help turn your vision into reality. We offer a full range of services, from initial consultation and feasibility studies to construction administration and project management. We pride ourselves on our creative problem solving skills and our ability to work within any budget to create the best possible outcome for our clients.

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Cost guides

Draughtsperson

R600 – R1100/hour
Draughtsperson - per hour fee

House planning

R900 – R1900/hour
Architect fee — per hour

3-bedroom house plan

R130,000 – R210,000
3-bedroom house plan

Interior designer

R3500 – R6000/room
Interior design plan per room

Featured articles

Recent requests

Interior design for a 100 sqm apartment

  • Property type: Apartment/Flat
  • City or suburb where you need the service: Johannesburg
  • Approx. size (sqm): 100
  • Estimated project start: 1–3 months
  • Price estimate: R85,000

I'm looking to create a warm, elegent and afro chic, 2 bedrooms, entertainment area, kitchen & bathroom. Would like to move in by the 1st September

Interior design for a 20 sqm toy room conversion

  • Property type: House/Townhouse
  • City or suburb where you need the service: Amanzimtoti
  • Approx. size (sqm): 20
  • Estimated project start: Within a month
  • Price estimate: R8500

I am looking to change a bedroom into a toy room

Interior design for a 45 sqm jewellery shop

  • Property type: Commercial
  • City or suburb where you need the service: Cape Town
  • Approx. size (sqm): 45
  • Estimated project start: 1–3 months
  • Price estimate: R45,000

Would like to remodel the front of our jewellery shop with a show case area, waiting area & consultation area

Interior design for 2 bedrooms and 3 bathrooms

  • Property type: House/Townhouse
  • City or suburb where you need the service: Johannesburg
  • Approx. size (sqm): 120
  • Estimated project start: 1–3 months
  • Price estimate: R85,000

want to update 2 girls’ bedrooms (aged 12 and 9) as well as 3 bathrooms in my home. The house has a bit of a French theme. The girls already have French beds and other furniture items. The bathrooms need to be retiled and updated, with possibly new fittings.

Interior design for a 200 sqm house

  • Property type: House/Townhouse
  • City or suburb where you need the service: Faerie Glen
  • Approx. size (sqm): 200
  • Estimated project start: Within a month
  • Price estimate: R120,000

3 bathrooms need to be redo. Want a more modernise look . Tiles needs to be change. Interior to be done in kitchen and lounge.

Interior design for a 212 sqm commercial showroom and offices

  • Property type: Commercial
  • City or suburb where you need the service: Sandton
  • Approx. size (sqm): 212
  • Estimated project start: Within a month
  • Price estimate: R85,000

Men's high end fashion and shoe brand from London coming to jhb. Dapper, sophisticated l, London feel. This is not a retail store, it is for brand offices with a show room combined. Need interior within next 2-3 weeks. Requirements: Reception area. Show room. Offices/desks 7-8 staff

Interior design for a 790 sqm house with library conversion

  • Property type: House/Townhouse
  • City or suburb where you need the service: Pretoria East
  • Approx. size (sqm): 790
  • Estimated project start: 1–3 months
  • Price estimate: R158,000

4 bed, bathrooms, kitchen, 2 living space & a patio .Would like to keep the existing furniture but willing to add more furniture. I want to change one of the rooms into a library. I love lux look with modern contemporary. No clutter designs,simple yet captivating. A home that makes you want to stay there forever. The outside finish speaks to the inside too! And more...wow me!

Interior design consultation for a 200 sqm house

  • Property type: House/Townhouse
  • City or suburb where you need the service: Linksfield
  • Approx. size (sqm): 200
  • Estimated project start: Within a month
  • Price estimate: R8000

Want to choose the correct colors of furniture with a designer, I already know what I want Want designer to see what I have , and to tell me what else I need and where to put it Basically about 3 to 4 hours

Full interior design for a 150 sqm house

  • Property type: House/Townhouse
  • City or suburb where you need the service: Amandasig
  • Approx. size (sqm): 150
  • Estimated project start: Within a month
  • Price estimate: R120,000

Changing the 2 bathrooms, floor (the entire house), changing new curtains & looking at buying new furniture

Interior design for a 40 sqm apartment

  • Property type: Apartment/Flat
  • City or suburb where you need the service: Cape Town
  • Approx. size (sqm): 40
  • Estimated project start: Within a month
  • Price estimate: R40,000

Newly built apartment to be completed in October. Got some furniture I would like to still use. Assistance with inside pieces, colours and lighting.