"#1 House Design & Build Company in Sri Lanka with 300+ On-Going Projects."

What Do You Get from Lex Duco?


  1. FREE Allocation of One (1) Chartered Architect and Two (2) Chartered Engineers for Your Home Construction
  2. FREE 30% Value Addition to Your Dream Home with Lex Duco Brand
  3. FREE “Design to Cost” Service, where Elegance and Your Budget at the Top Priority
  4. FREE 20 Years Dependable Structural Warranty


We are known for Luxury Elegant House Designs, High Quality Home Constructions and "Design to Cost".


"#1 House Design & Build Company in Sri Lanka with 300+ On-Going Projects."


We are the #1 House Design & Build Company in Sri Lanka with 300+ on-going projects and 200+ Home Designs to select from. Design and Build is our main service and this is how people know Lex Duco.

We provide you with the bellow "Design ONLY" service plus Construction Service together as a single package. In simple terms,..

"We design and we build your dream home within your budget."



Lex Duco Chat

30% High Resale Value* in the Property Market for Lex Duco Branded Homes


"With Lex Duco, it is an Investment with a Lifestyle!"

As you already know, Lex Duco is the Luxury Housing Brand in Sri Lanka, specially in Colombo. Therefore, a home that is designed and constructed by Lex Duco always has a higher resale value in the property market.

Why? Because of,..

  1. The Brand - The number one reason is the brand as people know Lex Duco as the number one luxury housing brand in Colombo and Sri Lanka.
  2. The Warranty - In our opinion, market recently learnt how important a 20 years warranty from a RELIABLE company is. A paper warranty is not at all valuable but the company should be reputed and large enough you provide the clients with a RELIABLE 20 years Warranty. Thus market adds values if your home is constructed by Lex Duco.
  3. The Professional Designs and Constructions - We employ only Chartered professionals to design and construct a home. Market knows it and market is wise enough to add value to it.
  4. The Complete Drawing Folder - With Lex Duco, you receive a complete drawing folder with all drawings and other related documents. It has a huge value when you are reselling as your buyers can see what has actually built under the plaster and paint of your home. It is also more professional and very attractive to buyers.
The market already knows about the official 20 years structural warranty and the drawing folder provided by Lex Duco, and thus, they will ask for it when you are reselling.


Lex Duco Chat

The 4 Questions that You Need Answers for Before Buying or Committing to a New Home


  1. How do I get a beautiful house designed by a professional Chartered Architect while maintaining within in my budget? This is a serious problem as you need the design within your budget in order to afford it. What good is a design if it required 150% of your budget?

  2. How do I get a company to guarantee a fixed budget for my project? I do not want later price suprices.
    This is another common problem, specially when clients deal with small individual contractors who do not have a brand name to protect or who are not established yet to protect it. They start with a small price just to undertake the job and later end up with almost 150-175% of the original quotation.

  3. How do I find and appoint a Chartered Engineer to inspect the project time to time and certify the quality of construction?
    It is difficult to employ Chartered Engineers on private cases as the hiring cost is high, reliability to visit on-time is low due to their busy schedules, coordinator duties between contractors, architects and engineers and so on.

  4. I usually need a warranty when I buy a TV, but how can I get such a warranty for this huge investment in millions?
    It is surprising to see that many people ask for warranties when they buy a TV for a sum less than 100,000/- but not consider it when they spend millions in a building or a house.
    We believe the reason is not because you do NOT need it, but because you do NOT have many options in the market. Thus, you assume the risk of building by yourself while the actual contractor is at ease. Yet, it is not the case with Lex Duco!
The answer to all above questions is "Lex Duco!".


Let's chat about House Plans and House Designs

We are the Best Company to Design Your Dream Home


We possess a design portfolio of 200+ designs that had been developed for our clients. We provide with the service of “Design Only” for our clients, who are interested in doing construction from someone known to them as well.

Why a Lex Duco Design?

"Your budget could be 3Mn or 30Mn, but you NEED a Beautiful Home within your budget, don't you?"

  1. Outstanding Designs with a Portfolio of 200+ Designs
    Just a glance at our website or Facebook page will speak for itself.

    Today, many people google “Lex Duco Designs” to find design ideas for their homes. They visit our website and obtain some ideas as well. However, the true benefit of our designs is for those who obtain our service to develop it. If you forward our designs to someone else and ask to do the same, you are making a grave error. They may match the front appearance of our home designs, but how about the most important lighting, ventilation, building orientation, ground level preparation, functionality, spatial arrangements, personal functional requirements, social requirements and so on?

    A Lex Duco Design is not just the appearance, but much more than that! It is more like a total living experience or a lifestyle that is designed professionally for your individual needs.

    Moreover, if an Architect is a doctor, a house designer is a nurse. She doesn't know the subject in depth, but has an idea just to mimic what an Architect would do. Thus, all your wishes including your spatial arrangements, lighting, ventilation, beauty of the building and so on will be messed up. Your budgetary goals will not be met as they are unaware of "Design to Cost". In other words, the optimum functionality of the house, beauty, usability and budgetary requirements will be compromised.


  2. "Why copy, when you can go for the Original? It's actually a saving with Lex Duco!"


    Let's chat about House Plans and House Designs

  3. DESIGN to COST
    Design to Cost is a system that is invented by Lex Duco to serve our clients better and it is not available elsewhere. It is not cutting down important functional elements to reduce the cost, but to rearrange them intelligently to minimize unnecessary costs while keeping the client's budgetary limitations in the mind.

    Chartered Architects and an Engineers, who are equipped with Lex Duco's Design to Cost Module are fully capable of developing designs within pre-planned budgets as the system guides them to the goal where Architecture and budget are balanced in harmony.

    Here the most important keywords are “Design to Cost”, Chartered Architects and Chartered Engineers and "Design to Cost" is the most important candidate due to the fact that it is the one that keeps Architects and Engineers on the track.

    Let's chat about House Plans and House Designs

  4. It is Cost Effective
    Our goal is your budget and your requirements. We will not design what we want but what you want for your budget.

    As mentioned, "Design to Cost" is a system that provides you with that output. Therefore, it's much more efficient in achieving budgetary goals while keeping the beauty of the house compared to the traditional method where the design is completed blindly without considering the final cost. Hence, the project ends up with a big costly surprise! Design to Cost saves us from that problem.

  5. "A Lex Duco Design is actually a saving to you, but not an extra cost!"

    Lex Duco Chat

  6. Our Designs are by Chartered Architects Only
    With or without Lex Duco, you need a Chartered Architect. Do not let others to ruin your dream home. They may sound cheaper as they charge less for the design, but so as their work. You will lose so much money while constructing and most of all, you will live in a home where you will never experience what the true architecture is.

    We have seen some of those ruined designs where the door of the master bedroom is open to living, living room is too dark even during the daytime, ventilation is not properly planned, the shower is placed in the middle of the bathroom causing the entire bathroom to be always wet, 2.5 - 3ft balconies which are neither useful nor useless, the garage is too narrow for a car to open its doors and many many more.

    Unfortunately, these are the designs they have bought for cheap prices and now they have to suffer for life or sell it at a cheaper price.

  7. "Never let a Draftsman to do the Architect's job!"


    Let's chat about House Plans and House Designs

  8. Our Designs are by Chartered Engineers Only
    Again, with or without Lex Duco, you need a Chartered Structural Engineer. Do not let others to risk the entire future of your dream home.

    The Foundation is everything, and structure comes next. A proper engineering design will allow your home to stand for over 50 years and an unprofessionally designed one will demonstrate signs of structural failure most probably within 5-10 years.

    We recommend not to risk it with your hard earned money.

    All our projects are managed via a "State of the Art" Project Management System under the responsibility of 2 Chartered Civil Engineers, 1 Chartered Architect and 1 Civil Engineer in addition to the technical officers. They are all in-house well-qualified professional staff but not outsourced.

    In simple terms, you will have 2 Chartered Civil Engineers, 1 Chartered Architect and 1 Civil Engineer to deliver your dream home up to its best standards.

Let's chat about House Plans and House Designs

"Design ONLY" Package, what does it include?


"Your budget could be 3Mn or 30Mn, but you NEED a Beautiful Home within your budget, don't you?”

  • An outstanding home or building design.
  • Design to Cost Module to design your dream home or building within your budget.
  • Complete tailor made architectural drawings set that is developed by a Chartered Architect based on your individual requirements and budget. In other words, the service of our Chartered Architects to develop your design under Lex Duco’s strict "Design to Cost" Module.
  • Complete structural drawings set by a Chartered Structural Engineer.
  • Council drawings for local authority approvals.
  • Electrical and plumbing layouts.
  • 5 Free site visits by a Chartered Architect (within 50km of Colombo).
  • 5 Free site visits by a Civil Engineer (within 50km of Colombo).
  • This service is not limited to houses, but available for commercial buildings, condominium projects and hotels as well.

Commercial Buildings, Condominium Projects and Hotels



We undertake “Design Only” or "Design & Build" contracts for commercial buildings, condominium projects and hotels.

Let's chat about House Plans and House Designs

×