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    Portia+Rohm Real Estate Development Group
    Residential and commercial development for sustainable living.
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    Repeatable success is not an accident.
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    We buy, build, and sell into our markets.
    Unparalleled insight gives our clients a strategic advantage.

What we do

Portia+Rohm Development

Targets asset classes: land (with and without entitlements), residential single family lots, multi-family (existing and new ground up construction), mixed use (existing and new ground up construction).

Mercurybox Inc.

Was launched in San Francisco and successfully completed numerous residential and commercial projects in San Francisco Bay Area (San Francisco, Alameda, Contra Costa, Marin counties) . Our management team has experience with residential new ground up construction, residential and commercial properties renovation, bonded public work performance, private and public road improvements.

Portia+Rohm Realty

Boutique real estate agency providing service for real estate buyers and sellers in San Francisco Bay Area.

For Investors

We partner with Investors who seek solid returns on a risk-adjusted basis in real estate development assets. Investors deal directly with us as principals on all development projects and benefit from our entitlement and construction expertise in targeted markets.

Track Record

Our experience is one of our most important contributions. We serve as the broker and developer, while self-performing as licensed general contractor on smaller projects. Being a vertically-integrated business gives us insight into risk and opportunities that we feel is unique in our marketplace.


While we always seek to increase the performance of our portfolio, we also maintain discipline as co-investors. We are constantly refining our data sources and repeatedly testing our investment assumptions. Unlike the stock market, timing the real estate cycle is critical to success. It is relatively easy to make great returns when the market is on the upswing. The more important result is to maintain those returns when the market enters a downturn. Discipline and vigilance help us ensure the best long-term portfolio returns.


The best plans can founder without committment to execution. Every step needs to be managed and verified so that the result is predictable. Development is a risky business because of the number of points of interaction with external authorities such as banks, inspectors, planning commissions, contractors, etc. Any one of them can potentially derail a project or cause significant cost overruns. Navigating these challenges is where we set ourselves apart. We obsess over the details so that our investment partners can have confidence that their funds are being actively protected every step of the way.

For Sellers

Our services for sellers include full spectrum of help with getting the best sale goal. This might include:

  • Specific marketing plan for each property
  • Assistance with getting building permits
  • Plan of property renovation
  • Consultation with choosing design and materials for renovation
  • Managing renovation process
  • Staging
  • Marketing (high-end videos, 3D walk-through tour, day and twilight photos, property website, paid ads, brochures and flyers, hosted tours for brokers etc)

For Buyers

We provide honest professional advice and full market analysis to help our buyers to find a home they would like to purchase.
Using our own special strategies we help to win in a multiple offer situation and very often even get equity at time of closing purchase.

How We Help Buyers

We are tireless in my pursuit to find you a home what you want. We have the patience to work with you for as long as it takes to find the home that resonates with your taste, lifestyle. I thoroughly understand what it takes to get an offer accepted and escrow closed. Home buyers in the competitive San Francisco market need an experienced and reliable advocate to protect their interests. Not only we are conscientious, careful, and mindful of your needs, but we will aggressively negotiate for you during escrow. Through many years of practicing real estate in the Bay Area, our personal relationships with other local Realtors, mortgage brokers, title companies, and inspectors strengthens our ability to ensure you get the home you want and deserve!

Contact Us

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